POS 65: End-Stage Renal Disease Treatment Facility
POS 65 is the place of service code for a freestanding ESRD treatment facility where outpatient dialysis is furnished. Physician claims at POS 65 revolve around the monthly capitation payment (MCP) codes 90951-90970, while the dialysis facility itself is paid under the ESRD PPS bundled rate.
- Setting
- Freestanding outpatient dialysis center
- Rate type
- Non-facility mapping; physicians paid via monthly capitation
- Common pairing
- MCP codes 90957-90962, dialysis procedure codes
- Watch out for
- MCP visit-count tiers: document each face-to-face encounter
What does POS 65 mean?
POS 65 identifies an end-stage renal disease treatment facility: per CMS, a facility other than a hospital that provides dialysis treatment, maintenance, or training to patients or caregivers on an ambulatory or home-care basis. In practice, the freestanding dialysis centers where most US outpatient dialysis happens.
Professional claims from the dialysis floor carry POS 65; the center's own treatment claims run under the ESRD PPS on institutional bills. The full POS table is in our Place of Service reference.
When do you use POS 65?
Use POS 65 on professional claims for services rendered at a freestanding dialysis facility:
- Monthly capitation codes 90951-90962 for in-center patients, tiered by age and visit count.
- Home dialysis MCP codes 90963-90966 supervised from the facility.
- Limited separately billable physician services performed on the dialysis floor that are not part of the MCP or the facility bundle.
Hospital-based dialysis units are a different setting (outpatient hospital codes apply), and inpatient dialysis is POS 21 with per-session procedure codes. The MCP concept itself is a cousin of capitation: one monthly payment for a defined management burden, regardless of how the month actually went.
How does POS 65 affect payment?
The facility-versus-non-facility question barely moves money here because the dominant physician payment is the monthly capitation code, and the dominant facility payment is the ESRD PPS bundle. What moves money is the MCP tier: for adult in-center patients, the 4-or-more-visit code pays meaningfully more than the 1-visit code in the same month, so each documented face-to-face encounter on the dialysis floor changes the month's reimbursement. Direction is certain even though your locality sets the exact dollars; price the tier spread for your area with the Medicare fee calculator.
The bundle has teeth too: labs and drugs inside the ESRD PPS cannot be unbundled to Medicare by outside suppliers, so reference labs serving dialysis patients need facility contracts, the same dynamic as SNF consolidated billing.
What are the common POS 65 errors and denials?
- MCP tier downcoding by default: practices billing the lowest visit tier all year because rounding documentation never made it to billing. That is silent underpayment, not a denial.
- Split-month errors: full MCP billed in months with hospitalizations or transient patients, drawing recoupments; per-day codes 90967-90970 exist for exactly these months.
- Duplicate MCP claims when two nephrologists in different groups both bill the month for a traveling patient; only one MCP per patient per month pays. Remit codes decode via the denial code lookup.
- Bundle violations: separately billing labs or drugs included in the ESRD PPS.
Frequently asked questions
Through the monthly capitation payment: one monthly code per ESRD patient (90951-90962 by age and number of face-to-face visits, 90963-90966 for home dialysis) covering the ongoing management of the dialysis patient. The tier depends on visit count: for adults, codes distinguish 1 visit, 2-3 visits, and 4 or more visits in the month, so visit documentation directly sets the payment level.
Yes. The dialysis facility bills Medicare under the ESRD Prospective Payment System, a bundled per-treatment rate covering the dialysis, most drugs, and labs. The nephrologist's MCP rides on a professional claim with POS 65. Services included in the facility bundle cannot be separately billed to Medicare by anyone, which is the ESRD version of consolidated billing.
Inpatient dialysis and visits are billed separately (90935-90937 for hemodialysis procedures, E/M at POS 21), and the outpatient MCP for that month may need to be reduced or replaced with per-day codes 90967-90970 depending on the situation. Split months are the sharpest edge in nephrology billing; a hospitalization tracker that talks to your charge entry is the difference between clean and chronic rework.
The MCP home dialysis codes 90963-90966 cover patients dialyzing at home, and claims are commonly billed with POS 65 (the supervising facility) or POS 12 per payer guidance. The payment is monthly regardless. What changes with home patients is the required monthly face-to-face and the facility's home training add-ons, each with their own documentation trail.
Sources & further reading
Reviewed by the ImmediCare Solutions RCM team
Certified billers and coders handling claims across 50+ specialties nationwide. This entry is reviewed against current payer policy and CMS rules. Last review: Jul 5, 2026.
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