Nephrology is one of the most billing-intensive specialties in medicine. Unlike most outpatient specialties where each visit generates a single E/M claim, nephrology practices manage a complex mix of monthly capitation payments, dialysis procedure codes, vascular access procedures, chronic disease management, drug administration, laboratory services, and transplant-related billing — each with its own coding rules, documentation requirements, and payer-specific restrictions.
The margin for error is narrow. A single miscoded ESRD Monthly Capitation Payment (MCP) can trigger a payer audit. Billing an E/M service on the same date as a dialysis MCP code without proper justification results in automatic denial. Using an ESRD code for a patient with Acute Kidney Injury is a compliance violation with real financial consequences.
In 2026, the nephrology billing landscape shifted again — with an increased ESRD Prospective Payment System (PPS) base rate, new transplant evaluation codes, expanded remote monitoring reimbursement, and permanent virtual supervision for dialysis. Practices still operating on 2024 or 2025 workflows are leaving revenue on the table and carrying compliance risk they may not be aware of.
This guide covers the complete nephrology billing and coding framework for 2026 — including all major CPT code categories, ICD-10 coding rules, 2026 updates, common denial patterns, and state-specific considerations for Illinois and Florida.
Part 1: The Core CPT Code Categories in Nephrology
Nephrology billing revolves around six primary service categories. Each has distinct coding rules and documentation requirements that differ significantly from general outpatient billing.
1. Chronic Kidney Disease (CKD) — Evaluation and Management
For patients with CKD who are not yet on dialysis, nephrology visits are billed using standard outpatient E/M codes — the same 99202–99215 framework used across specialties.
Key CKD E/M billing rules:
- Select the E/M level based on Medical Decision Making (MDM) or Total Time — the same 2021 CMS guidelines that apply to all outpatient E/M services
- CKD management frequently involves moderate to high complexity MDM — reviewing external lab results, managing prescription drug regimens, coordinating with other specialists, and assessing risk of progression — which supports 99214 and 99215
- When a nephrology E/M is billed on the same date as an in-office procedure (e.g., vascular access evaluation), Modifier 25 must be on the E/M code
Critical CKD ICD-10 coding rules:
CKD must be coded using stage-specific ICD-10-CM codes at the highest level of specificity. The stage documented in the medical record must be consistent throughout every encounter note. Failure to document and code the CKD stage is the single most common nephrology coding error.
| Code | Description |
|---|---|
| N18.1 | CKD Stage 1 |
| N18.2 | CKD Stage 2 (mild) |
| N18.30 | CKD Stage 3, unspecified |
| N18.31 | CKD Stage 3a (GFR 45–59) |
| N18.32 | CKD Stage 3b (GFR 30–44) |
| N18.4 | CKD Stage 4 (severe, GFR 15–29) |
| N18.5 | CKD Stage 5 (GFR <15, not yet on dialysis) |
| N18.6 | End-Stage Renal Disease (ESRD) |
Do not use N18.30 when N18.31 or N18.32 can be determined from the GFR. Payers are increasingly flagging unspecified codes where specific codes exist — particularly for Stage 3 CKD.
CKD with comorbid conditions — always code the underlying cause:
| Etiology | Primary Code | CKD Code |
|---|---|---|
| Diabetic nephropathy (Type 2) | E11.22 | + applicable N18 stage |
| Hypertensive CKD | I12.9 or I12.10 | Included in the I12 code |
| Hypertensive CKD with heart failure | I13.10 | + applicable N18 stage |
| Polycystic kidney disease | Q61.3 | + applicable N18 stage |
Always document the current GFR in the note. The GFR drives CKD staging and must be explicitly recorded — not just referenced from a lab result. Without it, the stage cannot be coded with specificity and payers may downcode or deny.
2. ESRD Monthly Capitation Payment (MCP) Codes — The Most Complex Area in Nephrology Billing
The ESRD Monthly Capitation Payment (MCP) system is unique to nephrology. Rather than billing individual visit codes each time a nephrologist sees a dialysis patient, Medicare reimburses a single monthly payment that covers all routine dialysis-related physician services for that month.
The MCP code selected depends on two factors: patient age and the number of documented face-to-face visits during the calendar month.
Adult in-center hemodialysis MCP codes (age 20 and over):
| Code | Visits Per Month | Description |
|---|---|---|
| 90960 | 4 or more | ESRD related services, per month, for home dialysis |
| 90961 | 2–3 | ESRD related services, per month |
| 90962 | 1 | ESRD related services, per month |
Home dialysis MCP codes — Full Month (90963–90966):
Used when the nephrologist manages the patient for the complete calendar month of home dialysis. Age is determined at the end of the month.
| Code | Patient Age | Description |
|---|---|---|
| 90963 | Under 2 years | ESRD related services for home dialysis, per full month |
| 90964 | 2–11 years | ESRD related services for home dialysis, per full month |
| 90965 | 12–19 years | ESRD related services for home dialysis, per full month |
| 90966 | 20 years and older | ESRD related services for home dialysis, per full month |
Per Diem Codes — Less Than Full Month (90967–90970) — In-Center AND Home Dialysis:
These codes apply to both in-center hemodialysis and home dialysis patients when ESRD-related services are provided for less than a full calendar month. Bill one unit per day of management. Age is determined at the end of the month.
| Code | Patient Age | Description |
|---|---|---|
| 90967 | Under 2 years | ESRD related services, per day (less than full month) |
| 90968 | 2–11 years | ESRD related services, per day (less than full month) |
| 90969 | 12–19 years | ESRD related services, per day (less than full month) |
| 90970 | 20 years and older | ESRD related services, per day (less than full month) |
When per diem codes apply — four qualifying conditions:
- In-center patient: Received one or more face-to-face visits during the month but a complete monthly assessment was NOT performed
- Home dialysis patient: Received home dialysis for less than a full calendar month
- Either patient type: Hospitalized during the month before a complete assessment could be performed — bill per diem codes for the outpatient supervision days and use appropriate inpatient E/M codes for the hospitalized days
- Either patient type: Dialysis stopped due to recovery, transplant, or death of patient
Example: An adult in-center hemodialysis patient is seen for 10 outpatient supervision days before being hospitalized for the remainder of the month and a complete monthly assessment was not completed. Bill 90970 with 10 units for the outpatient supervision days, and appropriate inpatient E/M codes for the hospitalized days.
Important billing rule for per diem codes: Codes 90967–90970 are limited to one unit per day per provider. The dates of service must indicate each specific day that supervision was provided. A single end-of-month date is not acceptable — each day must be documented and submitted separately.
What MCP codes include — and what they do NOT:
MCP codes are bundled payments. When a nephrologist bills a monthly MCP code, the following services are already included and cannot be billed separately:
- Routine dialysis evaluations
- Dialysis treatment supervision
- Routine patient management related to dialysis
- Medication management directly related to ESRD
When a separate E/M CAN be billed with an MCP code: A separate E/M visit may be billed when the physician evaluates and manages a significant, separately identifiable problem that is unrelated to dialysis. Examples include:
- Severe uncontrolled hypertension requiring a new management approach
- An acute infection (pneumonia, cellulitis)
- A new cardiac diagnosis
- Evaluation of a separate gastrointestinal problem
Modifier 25 is required on the E/M code. The documentation must clearly show the separate, unrelated problem was addressed with its own history, examination, and medical decision-making — completely distinct from the dialysis management note.
Face-to-face visit documentation — the most audited element of MCP billing:
The MCP code selection (90960 vs 90961 vs 90962) is driven by the number of documented face-to-face visits during the calendar month. CMS and commercial payers require:
- The date of each face-to-face visit documented in the medical record
- The nephrologist’s note for each visit
- A clear count of visits that matches the MCP code selected
Billing 90960 (4+ visits) when only 3 visits are documented is a compliance violation. Auditors specifically look at MCP visit counts — ensure your monthly billing workflow includes a visit count reconciliation before the MCP code is submitted.
3. Dialysis Procedure Codes
For acute kidney injury patients or dialysis procedures billed on a per-session basis, the following procedure codes apply:
| Code | Description |
|---|---|
| 90935 | Hemodialysis procedure, with single physician evaluation |
| 90937 | Hemodialysis procedure, requiring repeated physician evaluation |
| 90945 | Dialysis procedure other than hemodialysis, single evaluation |
| 90947 | Dialysis procedure other than hemodialysis, repeated evaluation |
| G0491 | Dialysis procedure for AKI patients — first treatment |
| G0492 | Dialysis procedure for AKI patients — subsequent treatments |
Critical rule — ESRD vs AKI dialysis codes:
G0491 and G0492 are used specifically for patients with Acute Kidney Injury (AKI) who require dialysis but do NOT have ESRD. Do not use ESRD MCP codes (90960–90970) for AKI patients — this is a compliance violation and a frequent audit finding. The distinction between AKI and ESRD must be clearly documented in the clinical note before any dialysis code is assigned.
4. Vascular Access Procedures
Vascular access procedures are among the highest-revenue services in nephrology and are billed separately from MCP codes. The most commonly billed include:
| Code | Description | Approx. Medicare Rate |
|---|---|---|
| 36818 | AV anastomosis, open; upper extremity vein transposition | $800–$1,200 |
| 36819 | AV anastomosis, open; upper extremity artery transposition | $900–$1,300 |
| 36820 | AV anastomosis, open; forearm vein transposition | $700–$1,000 |
| 36821 | AV fistula creation, direct, any site | $1,500–$2,500 |
| 36831 | Thrombectomy, dialysis circuit, without revision | $1,200–$1,800 |
| 36832 | Revision, dialysis circuit, without thrombectomy | $1,400–$2,000 |
| 36833 | Revision, dialysis circuit, with thrombectomy | $1,600–$2,200 |
Documentation requirements for vascular access:
- Access type (AVF vs AVG)
- Vessel assessment findings
- Anastomosis technique used
- Patency confirmation
- Any complications encountered
- Post-procedure plan and maturation timeline (for new fistulas)
Incomplete vascular access documentation is one of the most common triggers for post-payment audits in nephrology. The note must stand on its own — procedure templates that say “procedure performed without complications” without describing technique and findings will not survive audit.
5. ESRD-Related Drug Administration
Erythropoiesis-stimulating agents (ESAs) and iron replacement therapy are frequently administered in nephrology and billed separately using HCPCS J codes:
| Code | Drug | Notes |
|---|---|---|
| J0886 | Epoetin alfa, per 1,000 units (for ESRD on dialysis) | Buy-and-bill model; document units administered |
| J0885 | Epoetin alfa, per 1,000 units (non-ESRD) | Different code for non-ESRD patients — use correctly |
| J0882 | Darbepoetin alfa, per mcg (for ESRD on dialysis) | Document exact mcg administered |
| J0881 | Darbepoetin alfa, per mcg (non-ESRD) | Separate code from J0882 |
| J1750 | Iron dextran injection, per 50 mg | |
| J2916 | Sodium ferric gluconate complex in sucrose, per 12.5 mg | Ferrlecit |
| J1439 | Ferric carboxymaltose injection, per 750 mg | Injectafer |
Buy-and-bill documentation requirements:
- Exact drug name and NDC number
- Dose and units administered
- Route of administration
- Medical necessity linked to diagnosis (ESRD, iron deficiency anemia)
Using J0886 (ESRD) for a patient who does not yet have ESRD — or J0885 (non-ESRD) for an ESRD patient — is a coding error that triggers claim denial and compliance risk.
6. CKD Education and Preventive Services
Medicare covers kidney disease education services for Stage 4 CKD patients — a frequently missed revenue opportunity in nephrology practices.
| Code | Description | Rate | Frequency |
|---|---|---|---|
| G0420 | Kidney disease education, individual, per session | $80–$120 | Up to 6 sessions per patient |
| G0421 | Kidney disease education, group, per session | $25–$45 per patient | Up to 6 sessions per patient |
Eligibility requirements:
- Patient must have a confirmed diagnosis of Stage 4 CKD (N18.4)
- Education must be provided by a qualified renal disease educational service
- Services cannot be provided on the same day as an E/M visit
For a nephrology practice with 50 Stage 4 CKD patients who each complete the full 6-session education program, G0420 generates approximately $30,000–$36,000 in additional annual revenue from services most practices are not capturing at all.
Part 2: Laboratory and Diagnostic Codes Commonly Billed in Nephrology
Nephrology practices order and often perform a high volume of laboratory services. Correct diagnosis-to-code pairing is essential — payers use clinical edits to verify that each lab code is supported by an appropriate diagnosis.
| Test | CPT Code | Common Diagnosis Pairing |
|---|---|---|
| Renal function panel | 80069 | N18.x, N17.x |
| Basic metabolic panel | 80047 | N18.x, E87.x |
| Comprehensive metabolic panel | 80053 | N18.x, E11.22 |
| Creatinine | 82565 | N18.x, N17.x |
| BUN | 84520 | N18.x |
| Phosphate | 84100 | E83.39, N18.x |
| Potassium | 84132 | E87.5, N18.x |
| Calcium total | 82310 | E83.52, N18.x |
| Ferritin | 82728 | D50.9, N18.6 |
| PTH intact | 83519 | E21.3, N18.4 |
| CBC with differential | 85025 | D63.1, N18.6 |
| Urine protein/creatinine ratio | 84156 | N18.x, R80.9 |
| Urine microalbumin | 82043 | E11.22, N18.x |
Lab-to-diagnosis mismatch is a leading denial trigger in nephrology. For example, billing 84132 (potassium) without linking it to E87.5 (hypokalemia) or an appropriate renal diagnosis will fail payer clinical edits. Build a standard diagnosis-to-lab pairing reference into your billing workflow.
Part 3: 2026 Updates in Nephrology Billing
1. ESRD PPS Base Rate Increased to $281.71
The CY 2026 ESRD Prospective Payment System Final Rule, issued November 20, 2025 and effective January 1, 2026, increased the ESRD PPS base rate from $273.82 to $281.71 — a 2.9% increase that is expected to raise total Medicare payments to dialysis facilities by approximately 2.2%.
This is the facility-level bundled payment rate per dialysis treatment. The increase reflects updated drug pricing, labor costs, and overhead adjustments. Dialysis facilities should confirm their updated payment rates with their MAC (Medicare Administrative Contractor) for their specific geographic wage index adjustments.
2. ESRD Treatment Choices Model Terminated
CMS terminated the ESRD Treatment Choices (ETC) Model in 2026. This value-based payment model had been testing financial incentives for home dialysis and kidney transplantation. Its termination means:
- Practices that were participating in ETC no longer receive or are subject to ETC-specific payment adjustments
- Reporting obligations under the ETC model have ended
- Practices should confirm with their MAC that any ETC adjustment factors have been removed from their payment calculations
3. Permanent Virtual Direct Supervision for Dialysis
CMS made virtual direct supervision permanent for dialysis services in 2026. Previously a temporary COVID-era flexibility, nephrologists can now supervise dialysis technicians and staff via real-time audio/video technology without being physically present in the facility.
Documentation requirements for virtual supervision:
- The supervising nephrologist must be immediately available via real-time two-way audio/video
- The virtual supervision must be documented in the facility’s supervision log
- The method of supervision (virtual vs. in-person) must be clearly noted
4. Expanded Remote Patient Monitoring in Nephrology
Remote Patient Monitoring (RPM) has become increasingly relevant in nephrology — particularly for CKD management, home dialysis monitoring, and post-transplant follow-up. The 2026 CPT updates to RPM codes (covered in our 2026 Medical Coding Updates guide) directly affect nephrology practices:
- New shorter-duration RPM codes now allow billing for 2–15 day monitoring periods within a 30-day window — previously a full month was required
- Automatic transmission is mandatory — manual patient logs or self-reported data do not qualify for RPM reimbursement
- Claims for RPM services are denied when transmission minimums are not met or when documentation fails to reflect the required time thresholds
- RPM is particularly valuable for home peritoneal dialysis patients — automated peritoneal dialysis (APD) machines can transmit treatment data electronically, supporting RPM billing alongside monthly MCP codes
5. New Transplant Evaluation Codes
CPT 2026 introduced new codes for transplant evaluation services — reflecting the growing complexity of pre-transplant assessment work performed by nephrologists. Practices involved in transplant evaluation should review the updated transplant CPT code family and confirm correct code usage with their billing team and transplant center.
6. Physician Fee Schedule Adjustment
The 2026 Medicare Physician Fee Schedule includes a -2.5% efficiency adjustment affecting many E/M services. This impacts the nephrologist’s professional fees for CKD management visits (99202–99215) — though the ESRD facility-level PPS rate increase partially offsets this for practices with significant dialysis volume.
Part 4: Transition of Care Billing in Nephrology
Dialysis patients are among the highest-risk populations for hospital readmission, making transition of care billing both clinically important and financially significant.
| Code | Description | Rate | Restriction |
|---|---|---|---|
| 99495 | Transitional care management, moderate complexity (14-day contact requirement) | $165–$180 | Cannot be billed in same month as full MCP code |
| 99496 | Transitional care management, high complexity (7-day contact requirement) | $230–$250 | Cannot be billed in same month as full MCP code |
Key rule: Transition of care codes 99495 and 99496 cannot be billed in the same month as a full ESRD monthly MCP code (90960–90962) by the same provider. When a patient is discharged from the hospital and the nephrologist manages both the post-discharge transition and the monthly dialysis, the MCP code takes precedence for that month.
Documentation requirements for TCM in nephrology:
- Interactive contact with the patient or caregiver within 2 business days of discharge
- Face-to-face visit within 7 days (99496) or 14 days (99495) of discharge
- Medication reconciliation
- Coordination with discharging facility and other providers
Part 5: Common Modifiers in Nephrology Billing
| Modifier | When to Use in Nephrology |
|---|---|
| 25 | E/M billed on same day as MCP code — only for a separate, unrelated problem |
| 59 | Distinct dialysis procedure or vascular access service billed same day as another procedure |
| GY | Service statutorily excluded from Medicare coverage |
| GZ | Service expected to be denied as not medically necessary |
| AT | Active/acute treatment (certain circumstances) |
| TC | Technical component only (e.g., ultrasound guidance for vascular access) |
| 26 | Professional component only |
| -53 | Discontinued procedure |
Part 6: Top Denial Reasons in Nephrology and How to Fix Them
1. E/M Billed with MCP Code Without Modifier 25 and Separate Documentation
The most common denial in nephrology. Billing 99213 or 99214 on the same date as a monthly MCP code without Modifier 25 and a clearly separate problem-focused note.
Fix: Every same-day E/M with an MCP code must have Modifier 25 AND a separate note documenting the unrelated problem. The MCP note and the E/M note must be clearly distinct documents.
2. Wrong MCP Code Selected — Visit Count Does Not Match
Billing 90960 (4+ visits) when only 3 visits are documented, or 90961 when only 1 visit occurred.
Fix: Build a monthly visit count reconciliation into your billing workflow. Before submitting the MCP code, count the documented face-to-face visits for that calendar month and confirm the code matches.
3. ESRD Codes Used for AKI Patients
Using 90960–90970 MCP codes for a patient with acute kidney injury who does not have ESRD.
Fix: Verify ESRD status before assigning any MCP code. AKI dialysis is billed with G0491 (first treatment) and G0492 (subsequent treatments). The clinical note must document the distinction.
4. CKD Stage Not Documented or Coded
Billing N18.30 (unspecified Stage 3) when the GFR clearly indicates N18.31 or N18.32, or using N18.9 (unspecified CKD) when the stage is known.
Fix: Document the current GFR in every CKD encounter note. Map the GFR to the specific N18 stage code. Remove N18.9 and N18.30 from charge capture templates where more specific codes can be determined.
5. Drug Code Mismatch — ESRD vs Non-ESRD J Codes
Using J0885 (non-ESRD epoetin alfa) for an ESRD patient, or J0882 (ESRD darbepoetin) for a CKD Stage 4 patient not yet on dialysis.
Fix: Build a payer edit into your billing system that links drug J codes to the patient’s ESRD status. ESRD and non-ESRD drug codes are not interchangeable.
6. Lab-to-Diagnosis Mismatches
Lab codes submitted without an appropriate supporting diagnosis code — for example, 84132 (potassium) without E87.5 or a renal diagnosis.
Fix: Build a standard lab-to-diagnosis pairing grid into your billing workflow. Every lab order should have a pre-mapped diagnosis that satisfies payer clinical edits.
7. RPM Claims Denied for Missing Automatic Transmission
Remote monitoring claims rejected because data was manually reported rather than automatically transmitted from a device.
Fix: Confirm your remote monitoring devices are set up for automatic electronic transmission. Document transmission confirmation dates in the patient record. Do not bill RPM for months where automatic transmission minimums were not met.
Part 7: State-Specific Considerations — Illinois and Florida
Illinois — Nephrology Billing Notes
Medicare is primary for most ESRD patients in Illinois. Federal law grants Medicare eligibility to patients with ESRD regardless of age — most dialysis patients in Illinois are Medicare beneficiaries even if they are under 65. Illinois Medicaid typically acts as a secondary payer for these patients, covering copays and cost-sharing after Medicare processes the primary claim.
For CKD patients not yet on dialysis, Illinois Medicaid covers nephrology E/M services through the HealthChoice Illinois MCO programs. Claims for CKD management go to the patient’s MCO — not to TMHP or HFS fee-for-service. Verify MCO enrollment through MEDI (medi.illinois.gov) at every visit.
Key Illinois-specific billing notes for nephrology:
- ESRD patients on dialysis: bill Medicare first, then submit the Medicare remittance to the Illinois Medicaid MCO as secondary for any remaining patient liability
- CKD management for non-dialysis Medicaid patients: route claims to the patient’s HealthChoice Illinois MCO — Aetna Better Health (Payer ID: 68024), Blue Cross Community Health Plan (XOG + 9 digits, Payer ID: MCDIL), CountyCare (Payer ID: 06541), Meridian (Payer ID: MHPIL), or Molina (Payer ID: 20934)
- Kidney disease education (G0420/G0421) for Stage 4 CKD patients: covered by Medicare; verify coverage with individual MCOs for Medicaid patients
- IAMHP Billing Manual Version 35.0 (November 2025) includes updated guidance for nephrology-related FQHC and specialty services — confirm your billing team is using the current version
Florida — Nephrology Billing Notes
Florida has one of the largest ESRD patient populations in the United States, driven by its significant senior and Medicare-eligible demographic. This makes nephrology one of the highest-volume specialties in the Florida healthcare market.
Florida Medicaid structure for nephrology: Florida Medicaid operates through Statewide Medicaid Managed Care (SMMC), which has two components relevant to nephrology:
- Managed Medical Assistance (MMA) — covers most outpatient medical services including CKD management and nephrology E/M for non-ESRD Medicaid patients
- Long-Term Care (LTC) — covers long-term services and supports, relevant for ESRD patients in nursing facilities or requiring home health
Major Florida Medicaid MCO plans for nephrology:
- Molina Healthcare of Florida
- WellCare of Florida (Centene)
- Aetna Better Health of Florida
- Humana Medical Plan
- Simply Healthcare Plans (Centene)
- UnitedHealthcare Community Plan of Florida
⚠️ As with all Medicaid MCO states — always verify which Florida MMA plan the patient is enrolled with before submitting. Use the Florida Medicaid eligibility portal at mymedicaid-florida.com or your clearinghouse eligibility tool to confirm active enrollment and plan assignment at every visit.
Key Florida-specific billing notes for nephrology:
- ESRD patients on dialysis: Medicare is primary; Florida Medicaid MMA or LTC may act as secondary depending on the patient’s specific program enrollment
- CKD management for Medicaid patients: bill to the patient’s MMA plan MCO — not to Florida Medicaid fee-for-service
- Florida has a high volume of dual-eligible ESRD patients (both Medicare and Medicaid) — confirm whether each dual-eligible patient is enrolled in a D-SNP plan or standard Medicare + Medicaid secondary. Bill Medicare first, then route the crossover to the appropriate Florida Medicaid MCO
- Florida’s large Medicare Advantage market means many nephrology patients are in MA plans rather than original Medicare — confirm your practice is credentialed with the major Florida MA plans (UnitedHealthcare, Humana, BCBS of Florida) as these plans have their own prior authorization requirements for nephrology services including vascular access procedures
Florida Medicaid timely filing limits for nephrology claims:
| MCO | Timely Filing Limit |
|---|---|
| Molina Healthcare of Florida | 120 days |
| WellCare / Simply Healthcare (Centene) | 180 days |
| Aetna Better Health of Florida | 120 days |
| Humana Medical Plan | 90 days |
| UnitedHealthcare Community Plan | 90–180 days (verify contract) |
⚠️ Always verify timely filing deadlines in your specific provider contract with each Florida MCO. The limits above reflect published general guidelines — contracted terms govern.
What Your Nephrology Practice Should Do Right Now
Coding and documentation:
- Audit your last 30 MCP claims and confirm the visit count documented in the record matches the MCP code billed — this is the single highest-risk compliance area in nephrology
- Review all active dialysis patients and confirm ESRD diagnosis is clearly documented — patients who were admitted with AKI should not be carrying ESRD codes unless ESRD has been confirmed and documented
- Update CKD coding to remove N18.9 and N18.30 where more specific codes are determinable from GFR documentation
- Confirm drug J code assignments (J0885 vs J0886, J0881 vs J0882) match each patient’s ESRD status
2026 updates to implement:
- Update your ESRD PPS rate expectations — the new base rate of $281.71 represents a 2.9% increase from 2025
- Remove ETC Model payment adjustments if your practice was participating
- Set up virtual supervision documentation protocols if your practice uses remote supervision for dialysis
- Review your RPM billing workflow — confirm automatic device transmission is in place and that transmission logs are being documented
Revenue opportunities being missed:
- CKD Stage 4 education codes G0420/G0421 — audit your Stage 4 CKD patient list and identify those who have not yet received their 6 Medicare-covered education sessions
- Home dialysis training codes 90989/90993 — if your practice trains patients on peritoneal dialysis or home hemodialysis, confirm these are being captured
- RPM for home dialysis patients — if your APD machines support automatic data transmission, RPM billing may be available alongside monthly MCP codes
Final Thoughts
Nephrology billing is not forgiving of approximations. The rules around ESRD MCP codes, dialysis procedure coding, drug administration documentation, and CKD staging are specific, payer-enforced, and audited frequently. Practices that invest in getting the details right — visit count reconciliation, correct MCP code selection, accurate drug J code assignment, and compliant same-day E/M documentation — consistently outperform those that rely on generalized billing knowledge.
The 2026 ESRD PPS rate increase, permanent virtual supervision, and expanded RPM reimbursement represent meaningful revenue opportunities for nephrology practices that are positioned to capture them.
At ClaimsXperts, nephrology is one of our core specialty billing areas. We work with nephrology practices in Illinois, Florida, and across the country on ESRD MCP compliance, CKD coding accuracy, vascular access billing, drug administration documentation, and full-cycle revenue cycle management.
Contact us today to learn how ClaimsXperts can strengthen your nephrology billing operation.
ClaimsXperts is a Revenue Cycle Management company based in Frisco, TX, serving medical practices across the United States. We specialize in medical billing, coding, and insurance credentialing for solo practitioners, group practices, and specialty clinics.