Nephrology Billing Services
Nephrology operates on a billing model that exists nowhere else in medicine: the Monthly Capitation Payment (MCP). For ESRD beneficiaries on hemodialysis, the nephrologist does not bill per visit — the entire month of dialysis-related physician services bundles into a single MCP code that pays based on patient age and the number of documented face-to-face visits per month. The age tiers split four ways: 90951–90953 for patients under 2 years, 90954–90956 for 2–11, 90957–90959 for 12–19, and 90960–90962 for 20+ years. Each tier splits into three visit-frequency bands: code ending in 0 for 4+ visits per month (highest pay), 1 for 2–3 visits, 2 for 1 visit (lowest pay). A 4+visit MCP for an adult (90960) reimburses approximately $285; a 1-visit MCP (90962) for the same patient pays $195 — a $90 monthly differential per patient. Across a 380-patient dialysis panel, capturing the 4+visit tier on the patients who actually receive that level of care can mean $30,000+ a month in differential revenue. Layer on the per-treatment dialysis codes for inpatient hospital encounters (90935 single eval, 90937 multiple), peritoneal dialysis encounter codes 90945/90947, vascular access procedures (36147 fistulogram, 36901–36906 angioplasty/stent of the access), the kidney transplant evaluation and post-transplant management coding, and the AKI dialysis codes for non-ESRD patients (90935/90937 with the right diagnosis), and the result is a billing model where the documentation literally controls which capitation tier the practice gets paid. This page covers how nephrology billing actually plays out across MCP, vascular access, CKD, and transplant, and what stops the most common revenue leaks at each one.
Who This Page Is For
Common Billing Friction in Nephrology
MCP tier selection — the 4+ visit, 2–3 visit, and 1-visit revenue cliff
Adult MCP (age 20+) splits across 90960 (4+ face-to-face visits per month, ~$285), 90961 (2–3 visits, ~$245), and 90962 (1 visit, ~$195). Documentation must support each face-to-face visit with a separately dated encounter note describing the assessment performed. Practices that bill 90960 without four documented visit notes face Medicare downcoding to 90961 or 90962 on audit. Practices that bill 90962 when four visits actually occurred but only one was documented forfeit the $90 monthly differential. Across a 200-patient panel that gap runs $216,000 a year.
Commercial ESRD patients — UnitedHealthcare and the per-visit billing fallback
Medicare adopted the MCP model for ESRD; many commercial payers did not. UnitedHealthcare, certain BCBS plans, and several Medicare Advantage plans require per-visit E/M billing for dialysis-related encounters instead of the bundled monthly capitation. Submitting a 90960 to a payer that requires per-visit billing triggers a denial; submitting per-visit E/M codes to Medicare (which expects MCP) triggers a duplicate-billing denial against the implicit ESRD bundle. Practices need a payer-specific routing matrix that switches between MCP and per-visit billing based on the patient's primary payer.
Vascular access procedures — 36147 fistulogram and 36901–36906 angioplasty/stent
Vascular access maintenance generates substantial billable activity: 36147 angiography of the AV fistula or graft (~$285), 36148 each additional access studied (~$95), and the 36901–36906 angioplasty/stent series with progressive complexity (36902 angioplasty single segment, 36903 stent placement, 36905 mechanical thrombectomy with angioplasty, 36906 mechanical thrombectomy with stent). Each is separately billable when performed outside the routine dialysis session. Humana and several Medicare Advantage plans bundle access procedures with the monthly dialysis payment; the medical-exception pathway requires distinct operative notes for separately performed access work.
Kidney biopsy 50200/50205 and the post-procedure global period
Percutaneous renal biopsy (50200, ~$485) for native kidney evaluation in CKD or AKI workup, and renal allograft biopsy (50205) for post-transplant rejection workup, each carry their own coding requirements and 0–10 day global periods depending on Medicare classification. Imaging guidance (76942 ultrasound or 77012 CT) is separately billable when performed and documented. Pathology coordination on the biopsy specimen (88305 each block) is on the pathology side. Practices that perform biopsies but bill only the procedure without imaging guidance leave $80–$120 per case uncaptured.
Transplant evaluation and immunosuppression management — billable services often missed
Pre-transplant evaluation involves multi-visit workup that bills as standard E/M (99214/99215) plus consultation-style coding where the patient is being assessed for transplant listing eligibility. Post-transplant management — immunosuppression dose adjustment, rejection surveillance, calcineurin-inhibitor level monitoring — bills as standard E/M with no special transplant code. Practices that consider transplant patients 'covered by the transplant center' and do not bill their own management visits forfeit substantial revenue across the 380+ day post-transplant period when nephrology continues to manage the medical side of the patient.
Nephrology-Specific Payer Issues We Watch For
Medicare
Issue: Monthly capitation payment (MCP) codes (90960-90962) are selected based on the number of face-to-face visits per month — documentation must support each visit with separate dated encounter notes
Our approach: We verify face-to-face visit counts against MCP code selection for every monthly claim and downcode when documentation does not support the billed visit count
UnitedHealthcare
Issue: Does not recognize the ESRD MCP codes for non-Medicare patients and requires per-visit billing instead of monthly capitation
Our approach: We maintain a UHC-specific nephrology billing workflow that converts monthly capitation claims to per-visit E/M billing for commercial ESRD patients
BCBS
Issue: Requires separate prior authorization for erythropoiesis-stimulating agents (EPO/ESA) used in dialysis with specific hemoglobin threshold documentation
Our approach: We track hemoglobin levels for all dialysis patients and submit ESA prior authorizations with lab data supporting the payer-specific hemoglobin thresholds
Humana
Issue: Bundles AV fistula and graft access management codes with the monthly dialysis payment, denying separate claims for vascular access procedures performed in the dialysis unit
Our approach: We document vascular access procedures with distinct operative notes and bill separately when performed outside the routine dialysis session with appropriate modifiers
What We Handle
MCP coding — 90951–90970 across age and visit-frequency tiers
Age-tier and visit-frequency MCP coding with documented face-to-face visits supporting each tier (4+ visit, 2–3 visit, 1 visit), dated encounter notes per visit, and the partial-month billing for new dialysis starts mid-month.
Per-visit billing for commercial ESRD patients
Payer-specific routing between MCP coding (Medicare) and per-visit E/M billing (UnitedHealthcare and certain commercial plans), with a per-payer matrix that prevents wrong-model submissions and the resulting denials.
Vascular access — 36147 fistulogram, 36901–36906 angioplasty and stent
AV access maintenance procedure coding for fistulogram, angioplasty single and multiple segment, stent placement, and mechanical thrombectomy variants, with the medical-exception documentation when commercial payers attempt to bundle access procedures into the dialysis payment.
CKD stage-based E/M and the ESRD transition
CKD pre-dialysis E/M coding (99214/99215 for moderate-to-high MDM patients with stage 3b–5 CKD), the diagnosis-coding discipline for CKD stages (N18.30, N18.31, N18.32 for stage 3 sub-stages, N18.4 for stage 4, N18.5 for stage 5), and the transition workflow when a patient initiates dialysis.
Kidney biopsy — 50200/50205 with imaging guidance
Percutaneous native kidney biopsy (50200) and allograft biopsy (50205) coding with paired imaging guidance (76942 ultrasound or 77012 CT) and the global-period management that follows.
Transplant evaluation, listing, and post-transplant management
Pre-transplant E/M coding for transplant evaluation and listing workup, post-transplant management coding for immunosuppression and rejection surveillance, and the longitudinal billing across the post-transplant period when nephrology continues to manage the medical side.
Key Nephrology CPT Codes
| CPT Code | Description | Avg. Reimbursement |
|---|---|---|
| 90960 | ESRD-related services, per month, for patients 20+ years, with 4+ face-to-face visits | $285 |
| 90961 | ESRD-related services, per month, with 2-3 face-to-face visits | $245 |
| 90962 | ESRD-related services, per month, with 1 face-to-face visit | $195 |
| 90935 | Hemodialysis procedure with single evaluation | $82 |
| 90937 | Hemodialysis procedure requiring repeated evaluation | $118 |
| 90945 | Non-hemodialysis dialysis procedure (peritoneal) | $95 |
| 50360 | Renal transplant, allotransplantation | $2,800 |
| 90951 | ESRD-related services for patients under 2 years, full month | $620 |
Real Results
The Challenge
A 6-provider nephrology group managing 380 dialysis patients was losing revenue on monthly capitation payment coding, missing transplant evaluation billing, and had inconsistent ESRD PPS composite rate billing across two dialysis units
Our Approach
We standardized MCP coding across all dialysis patients, implemented transplant evaluation and follow-up code capture, and reconciled ESRD PPS billing against CMS requirements for both dialysis units
Key Outcomes
- check_circle Monthly capitation revenue increased by $14 per patient per month
- check_circle Transplant evaluation billing added $7,800 per month
- check_circle ESRD PPS composite rate billing errors eliminated
- check_circle Annual revenue increased by $189K
“We were not billing transplant evaluation codes at all. MedPrecision identified that gap and it added nearly $100K annually to our practice.”
Why General Billing Teams Miss Nephrology Issues
General billing staff handle dozens of specialties and rarely develop the depth needed for nephrology coding nuances. Here is what gets missed.
Modifier and bundling errors
Specialty-specific modifier rules and CCI edits are frequently overlooked by teams that do not work exclusively in nephrology.
Under-coding high-complexity visits
Nephrology encounters often qualify for higher-level E/M codes, but generalist billers default to mid-level codes to avoid audit risk.
Missed payer-specific rules
Each payer has unique coverage and documentation requirements for nephrology procedures that general teams rarely memorize.
Slow denial turnaround
Without specialty knowledge, appeal letters lack the clinical specificity needed to overturn nephrology denials quickly.
“Nephrology practices with dialysis units leave the most revenue on the table with monthly capitation coding errors and missed transplant evaluation billing. The per-patient revenue impact is small, but across 300+ dialysis patients it adds up to six figures.”
MedPrecision Billing Team
Nephrology Coding and Compliance Specialist
Transition Plan
Switching billing partners should not disrupt patient care or cash flow. Our transition plan is designed for zero downtime.
Discovery and Specialty Audit
We review your current nephrology billing workflows, denial patterns, and payer mix to build a tailored onboarding plan.
System Integration
We connect to your EHR and practice management system, configure specialty-specific code sets, and validate charge capture workflows.
Parallel Billing Period
We run billing in parallel with your current process for 2-4 weeks to verify accuracy before taking over completely.
Full Transition and Reporting
Once validated, we assume full billing responsibility with monthly reporting dashboards and a dedicated account manager.
Nephrology Billing Terms
- Monthly Capitation Payment (MCP)
- Medicare's per-month payment for ESRD-related physician services including all outpatient dialysis-related care. Payment level varies based on patient age and the number of face-to-face visits per month (90951-90970 code series).
- ESRD PPS (Prospective Payment System)
- Medicare's bundled payment system for dialysis facility services that includes a base rate adjusted for patient and facility characteristics. Covers dialysis treatment, drugs, lab tests, and supplies in a single composite payment.
- Composite Rate
- The bundled per-treatment payment covering routine dialysis services, supplies, equipment, and certain drugs and tests. Items not included in the composite rate can be billed separately with appropriate HCPCS codes.
- Vascular Access Management
- Procedures related to creating, maintaining, and managing arteriovenous fistulas, grafts, and catheters used for dialysis. Separately billable when performed outside the routine dialysis session with proper documentation.
- Transplant Evaluation Coding
- Codes for the evaluation and management of patients being assessed for kidney transplant eligibility, including pre-transplant workup, listing management, and post-transplant follow-up care.
- EPO/ESA Administration
- Erythropoiesis-stimulating agent administration for dialysis-related anemia. Billing requires documentation of hemoglobin levels, dosage adjustments, and prior authorization for commercial payers with specific lab value thresholds.
Last updated: 2026-03-17
Common Questions
Common questions about nephrology billing services.
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Request Review arrow_forwardHow does monthly capitation payment work for dialysis patients?
MCP codes (90960-90970) provide a monthly bundled payment for managing dialysis patients based on age and the number of face-to-face visits provided that month. Four or more visits per month yields the highest rate, while 2-3 visits or 1 visit yields progressively lower rates. We track visits and bill the correct MCP level each month.
How do you bill for vascular access procedures?
Vascular access procedures are billed with procedure-specific CPT codes depending on the type of access (AV fistula, AV graft, tunneled catheter) and whether it is initial creation, revision, or declotting. We apply correct professional and facility component modifiers based on the site of service.
What changes when a CKD patient starts dialysis?
When a patient initiates dialysis, billing transitions from standard E/M office visits to the ESRD Monthly Capitation Payment model. We manage this transition including the first month's partial billing, patient education session coding, and establishing the monthly visit tracking workflow.
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