HCPCS code A4913 – Miscellaneous dialysis supplies

Key takeaways

A4913 is the HCPCS Level II code for dialysis supplies that no named code in the A4651-A4932 range describes.

Medicare Part B does not pay A4913 separately. CMS gives it pricing indicator 00 and lists it on the ESRD PPS consolidated billing list.

The ESRD facility’s bundled payment covers the supply in every setting, in-center and home, so a DME supplier cannot bill it to Medicare.

Use a specific code whenever one exists, and link N18.6 on the facility claim to support the ESRD diagnosis.

Pabau, the practice management platform we build, keeps the ESRD diagnosis, the supply codes and each claim’s status on one patient record.

HCPCS code A4913: Definition and clinical category

HCPCS code A4913 is defined by the Centers for Medicare and Medicaid Services (CMS) as miscellaneous dialysis supplies, not otherwise specified. It belongs to HCPCS Level II, the CMS set of HCPCS codes for supplies, equipment and services that CPT codes do not describe.

A4913 sits in the dialysis supply range, A4651-A4932. Most codes in that range name a specific item, such as blood tubing, dialysate or gloves. A4913 is reserved for a dialysis supply that is medically necessary but matches none of those named codes.

Under Medicare, A4913 is not separately payable. It is included in the ESRD Prospective Payment System (PPS) bundle, which pays the dialysis facility one rate per treatment.

Key facts about the code:

• Code system: HCPCS Level II, maintained by CMS
• Range: A4651-A4932, supplies for end-stage renal disease (ESRD)
• Descriptor type: Miscellaneous, not otherwise specified (NOS)
• Medicare pricing indicator: 00, not separately priced by Part B
• Medicare coverage code: D, special coverage instructions apply
• ESRD PPS status: On the CMS CY2026 ESRD PPS consolidated billing list

Because A4913 is a NOS code, correct use starts with checking that no more specific HCPCS code exists for the item. If a named code fits the item, A4913 is the wrong code for it.

What A4913 covers and what it excludes

A4913 is a residual category. It describes items used in hemodialysis or peritoneal dialysis that are medically necessary but do not map to a named A-code. A minor consumable or ancillary component with no standalone code is the typical example.

The exclusion list matters more than the inclusion list. Any item that already has a named HCPCS code must be reported under that code, not A4913. These common dialysis supplies have their own codes:

Every code in this table is on the same CMS ESRD PPS consolidated billing list as A4913. Choosing the specific code improves reporting accuracy and audit defense. It does not unlock a separate Medicare payment.

Our guides to A4750 and A4911 show how two of those named codes are documented and billed.

Medicare coverage rules for A4913

Medicare covers the supplies A4913 describes, but it pays for them only inside the ESRD PPS bundle. CMS assigns A4913 pricing indicator 00, which means Part B does not price it separately. Its coverage code is D, which means special coverage instructions apply.

The code appears on neither the Physician Fee Schedule nor the DMEPOS fee schedule. For Medicare purposes, three conditions still shape how the supply is documented:

• ESRD diagnosis: The patient must have a confirmed ESRD diagnosis. The facility claim carries ICD-10-CM N18.6 (end-stage renal disease), plus the underlying cause code where your MAC requires it.
• Medical necessity: The plan of care must show why this patient needs the specific supply. A vague “dialysis supply” note in the chart does not meet this bar.
• No more specific code: The item must lack a dedicated HCPCS descriptor. If a named code exists, use it instead.

With no separate Medicare payment, there is no fee to look up and no separate Part B claim to authorize for A4913.

ESRD billing requirements and A4913

The ESRD PPS is the billing framework for A4913. CMS bundles dialysis-related drugs, labs, supplies and services into a single per-treatment payment to the ESRD facility. A4913 supplies are part of that bundle in every setting.

Strong medical billing compliance in this area turns on who furnished the supply. Under Medicare, that is the ESRD facility, whether the patient dialyzes in-center or at home.

In-center (facility) dialysis

When dialysis takes place at a Medicare-certified ESRD facility, the per-treatment payment covers the supplies used. No separate payment exists for A4913 in this setting. A separate claim for the supply is denied as bundled.

Home dialysis

Home dialysis supplies are bundled too. Method II, which let a supplier bill a DME MAC directly for home dialysis supplies, ended on January 1, 2011. Since then, the ESRD facility furnishes or arranges home supplies and receives the bundled payment for them.

A supplier that ships home dialysis supplies is paid by the facility under its arrangement with that facility, not by Medicare. For each home patient, the facility should keep:

• A home dialysis plan of care from the treating nephrologist
• A note in the plan of care that names the supply and why the patient needs it
• Supply records showing what was shipped and when
• Any supplier invoice for the item

A4913 reimbursement: Why there is no fee schedule rate

A4913 has no Medicare fee schedule rate. The code is absent from the Physician Fee Schedule and the DMEPOS fee schedule. As a result, it has no locality-adjusted rate, no national limitation amount and no invoice-based price.

The supply is paid through the ESRD facility’s per-treatment PPS payment. That payment does not change with the number of A4913 items a patient uses.

CMS updates the consolidated billing list each year. Check the current list on the CMS ESRD PPS consolidated billing page before you set up billing rules for dialysis supplies.

How to document and code A4913 correctly

Correct use of HCPCS code A4913 starts in the chart, with a documentation sequence that has to be in place before anyone picks the code. Practices that use claims management software can build these checks into a pre-submission workflow.

Every A4913 line rests on two separate decisions, made in this order, and the diagram below maps both.

1. Confirm ESRD diagnosis: The patient record must include an active ESRD diagnosis. Link ICD-10-CM N18.6 on the facility claim, or the underlying cause code where your MAC requires it.
2. Verify no specific HCPCS code exists: Search the full A4651-A4932 dialysis range. Document that the search was done and that no more specific code covers the item.
3. Document medical necessity: The nephrologist’s notes or the home dialysis plan of care must state that this patient needs the specific supply. A generic dialysis note does not suffice.
4. Confirm who bills: The ESRD facility reports the dialysis on its institutional claim and receives the bundled payment. A DME supplier does not bill Medicare for the supply.
5. Record the quantity supplied: Log the quantity the patient received. It does not change the Medicare payment, but it supports cost reporting and audits.
6. Keep supporting documentation: File the invoice or itemized supply list. Some non-Medicare payers ask for it, and auditors may request it later.

A clean claim for a dialysis patient needs the first four steps in place before it is filed. The last two protect the facility when a payer or auditor asks how the supply was handled.

Medicaid and commercial payer considerations

The bundling rule above governs traditional Medicare claims. Medicare Advantage plans, state Medicaid programs and commercial payers set their own payment policies for dialysis supplies.

Some follow Medicare’s bundled approach. Others negotiate dialysis rates in the facility contract. Check the payer’s dialysis policy or contract before you report A4913 as a separate line.

When a payer does accept a NOC code for payment, it usually wants a narrative description of the item and an invoice. Keep both ready before the claim goes out.

Common claim denial reasons for A4913 and how to fix them

Most A4913 denials trace back to one misunderstanding: Treating the code as separately payable under Medicare. Effective denial management in healthcare starts with catching that error before the claim is filed.

How claims management software reduces A4913 billing errors

Dialysis billing teams often track diagnoses, supply codes and claim outcomes in separate places. That makes it easy to send a bundled supply out as a separate claim, then lose time on the denial.

Pabau brings that work onto one patient record. The diagnosis, the codes on each claim and the claim’s status sit side by side, so nobody has to cross-check three files.

With one record per patient, your team can see the ESRD diagnosis and the codes on a claim before it is filed. Denials that do arrive are easier to trace back to their cause.

Keep dialysis codes and claims in one place

Pabau puts the ESRD diagnosis, supply codes and claim status on one patient record. Your billing team checks each dialysis claim in one place instead of several spreadsheets.

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Conclusion

Under Medicare, A4913 records what the patient used and earns no payment of its own. The supply is paid inside the ESRD facility’s per-treatment rate, whether the patient dialyzes in-center or at home.

Your work is to pick the most specific code, link the ESRD diagnosis and document why the patient needs the item. Do that, and the facility claim is clean and audit-ready. Billing the supply separately only creates a denial to work.

Book a demo to see how Pabau helps your dialysis billing team stop a bundled supply before it leaves as a separate claim.

Continue your research

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Struggling with claim rejections across your coding team? Denial codes in medical billing explains the most common CARC and RARC codes and how to resolve each one.

Want to reduce HCPCS supply claim errors before they leave your practice? Medical billing compliance outlines documentation and submission standards that support cleaner claims across all payer types.

Billing peritoneal dialysis solution? HCPCS code A4726 covers dialysate by fluid volume and how Medicare treats it.

Coding a tourniquet used at the dialysis chair? HCPCS code A4929 explains its billing and coverage rules.

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