Dialysis Center Billing Services

Dialysis billing is built around the End-Stage Renal Disease Prospective Payment System. Medicare pays a bundled rate for each treatment, and many drugs, labs, and supplies are included in that bundle. Claims are filed monthly on the institutional form, with one line for each treatment date.

Claim details matter. Each claim needs the right treatment type, a condition code, lab values, and modifiers. Treatments above the usual monthly limit need support. Westmont Revenue Partners connects dialysis centers and nephrology groups with vetted medical billing experts who know these rules. Good dialysis center billing keeps your monthly claim cycle steady and your records ready for review.

Who this is for

• Independent and hospital-based dialysis facilities
• Home dialysis and training programs
• Nephrology groups that bill monthly physician services
• Dialysis organizations that handle many patients and payers
• Administrators who manage Medicare, Medicare Advantage, and commercial payers

What gets billed

• In-center hemodialysis treatments
• Peritoneal dialysis, including continuous and cycler methods
• Home dialysis training and support
• Dialysis for acute kidney injury at a certified facility
• Drugs and biologicals given during dialysis, as the payment system allows
• Laboratory tests tied to dialysis
• Separately payable services marked as unrelated to dialysis
• Monthly physician management of dialysis patients
• Extra treatments with medical need documented
• Medicare Advantage information-only claims

Commonly billed codes

Code	Type	What it covers
721	Bill type	Dialysis facility claim for a full billing period
0821	Revenue code	Hemodialysis treatments (the 082x group)
0831	Revenue code	Peritoneal dialysis treatments (the 083x group)
0841	Revenue code	Continuous ambulatory peritoneal dialysis (the 084x group)
0851	Revenue code	Continuous cycling peritoneal dialysis (the 085x group)
90935	CPT	Hemodialysis with one physician evaluation
90937	CPT	Hemodialysis needing repeated physician evaluation
90945	CPT	Peritoneal dialysis with one physician evaluation
90960	CPT	Monthly dialysis services for adults with four or more visits
90966	CPT	Monthly home dialysis management for adults
G0491	HCPCS	Dialysis for acute kidney injury at an ESRD facility
AY	Modifier	Item or service not related to ESRD treatment
N18.6	ICD-10-CM	End-stage renal disease
Z99.2	ICD-10-CM	Dependence on renal dialysis
71 to 76	Condition code	Type of dialysis setting, such as in-unit, self-care, or home

Note

Codes are examples for orientation, not a complete list, and do not guarantee coverage or payment. Always check current code sets and payer policy.

Billing challenges in dialysis centers

Bundled payment rules. Many drugs and labs are included in the treatment payment. Billers learn which items are bundled so claims do not include lines that cannot be paid separately.

Treatment limits per month. Medicare generally caps payment at a set number of treatments in a month unless medical need is shown. Billers flag extra sessions early and make sure the notes support them.

Required claim data. Every claim needs a condition code for the dialysis setting and a Kt/V reading. Missing data can return a claim. Billers set up checklists so clinical staff supply data on time.

AY and unrelated services. Services that are not part of dialysis care use a specific modifier and follow separate rules. Billers review each non-dialysis line and avoid mixing the two types.

Home dialysis and training. Training treatments and home dialysis use different setting codes and timelines. Billers confirm the patient's setting and dates for each month.

Acute kidney injury treatments. Dialysis for acute kidney injury at a certified facility uses its own code and condition code. Billers watch for the difference between acute and chronic patients.

Medicare Advantage and secondary payers. Some claims are information only, while others need coordination with a primary payer. Billers track coverage changes and update records each month.

Physician monthly billing. Monthly management codes depend on patient age and the number of face-to-face visits. Billers help nephrology groups align visit counts with the code they report.

How Westmont can help

• Match your facility with vetted billing experts who work with ESRD claims
• Support end-to-end revenue cycle work, from monthly claim prep to payment posting
• Help with denial management and Medicare Advantage follow-up
• Connect you with experts for enrollment and credentialing questions
• Provide a way to compare billing partners before you decide

Frequently asked questions

How are dialysis centers paid by Medicare?

Medicare pays dialysis facilities a bundled amount for each treatment under the ESRD payment system. Many drugs, labs, and supplies are included in that bundle. Adjustments may apply for patient and facility factors. Rates change each year, so check current Medicare updates.

What bill type do dialysis centers use?

Medicare dialysis facility claims use bill type 721 for a full billing period. Adjustments and cancellations have their own bill type endings. Your biller should confirm formats with your Medicare administrative contractor and with each Medicare Advantage plan.

What is the AY modifier?

AY marks a drug, lab, or service that is not related to the patient's ESRD care. Items with this modifier follow standard Medicare rules and are not paid under the dialysis bundle. Using it correctly requires clear records, so many centers review these lines before submission.

Do dialysis claims need lab values?

Yes, Medicare requires certain data on dialysis claims, including a Kt/V reading for dialysis patients. Missing values can cause a claim to be returned. A good billing process includes a monthly check with clinical staff to confirm all required data is present.

Should a dialysis center outsource billing?

Many centers do, especially smaller ones. Westmont does not submit claims itself. We connect you with vetted billing experts who know dialysis claims. Ask each expert how they handle monthly cycles, home programs, and Medicare Advantage follow-up.

Related billing services

• Nephrology Billing
• Hospital Billing
• Infusion Center Billing
• Laboratory Billing
• Home Health Billing