HCPCS code A4723 – Dialysate solution billing guide

Key takeaways

HCPCS code A4723 is peritoneal dialysis solution with any dextrose concentration, in a fluid volume above 2999 cc and up to 3999 cc.

The code is one of seven volume bands, A4720 to A4726, so the bag’s labeled fill volume decides which code applies.

CMS lists A4723 among the ESRD supplies not payable to DME suppliers, so Medicare pays for it inside the dialysis facility’s bundled payment.

A separate DME claim for A4723 is denied, and no fee schedule amount, KX modifier or competitive bidding price applies to it.

A4724 is the next dialysate band. Equipment cleaning chemicals are A4674.

HCPCS code A4723: definition and code attributes

HCPCS code A4723 describes peritoneal dialysis solution with any concentration of dextrose. Its fluid volume is greater than 2999 cc but no more than 3999 cc. The code is a Level II code maintained by the Centers for Medicare and Medicaid Services (CMS).

The descriptor turns on two facts: the solution contains dextrose, and its fluid volume falls inside one band. Strength is irrelevant, so a 1.5% and a 4.25% dextrose bag of the same volume share the code.

Check the descriptor each January against the annual CMS HCPCS release. Read the current year of the consolidated billing list too, because CMS revises it every year.

The A4720 to A4728 dialysate code family

CMS splits dextrose-containing peritoneal dialysis solution into seven codes by fluid volume. A4723 is the fourth band. A separate code covers non-dextrose solution.

How to pick the right volume band

Each band starts one cc above a round number. That means a bag labeled with a round volume always sits at the bottom of a band, as the chart below shows.

• A 2,000 cc bag is greater than 1999 cc, so it codes to A4722, not A4721.
• A 3,000 cc bag is greater than 2999 cc, so it codes to A4723.
• A 4,000 cc bag is greater than 3999 cc, so it moves up to A4724.
• A non-dextrose solution leaves the volume bands entirely and codes to A4728.

Read the fill volume from the product label, not from the prescribed exchange volume. A 2,500 cc exchange drawn from a 3,000 cc bag still describes a 3,000 cc supply.

A4724 is the next dialysate band. Equipment cleaning chemicals are A4674.

ESRD PPS consolidated billing for A4723

Medicare pays for A4723 inside the dialysis facility’s bundled payment, not as a separate supply line. The ESRD prospective payment system covers the drugs, laboratory tests, supplies and equipment a facility furnishes to treat ESRD.

CMS publishes the affected codes each year in Attachment B of its ESRD PPS consolidated billing list. The attachment splits the supply codes into two groups. A4723 sits in the group headed DME ESRD supply HCPCS not payable to DME suppliers.

Home peritoneal dialysis works the same way. The ESRD facility that manages the patient’s home program furnishes the solution, and its payment covers it. Other suppliers look to that facility for payment rather than billing Medicare themselves.

The facility’s payment comes from the ESRD PPS base rate, adjusted for patient and facility factors. None of that amount is tied to A4723, which is why a fee schedule lookup for the code returns nothing useful.

What happens when A4723 is billed separately

A DME supplier claim for A4723 is denied under the ESRD PPS consolidated billing edits. More documentation does not change the outcome, because the code has no separate Medicare payment route.

• The line denies as bundled. The remittance reads as a bundling or consolidated billing adjustment. Look up the CARC and RARC on the line in our billers’ denial code guide before acting on it.
• A corrected claim will not fix it. Adding a KX modifier, a certificate of medical necessity or a different unit count leaves the same denial in place.
• The right route is the facility. A supplier that ships dialysate to a home patient arranges payment with the ESRD facility running that patient’s program.
• Repeat denials point to a process problem. If the same supply keeps reaching the DME MAC, the order routing needs to change, not the coding.

Documentation to keep for A4723

Separate Medicare payment is not at stake, but the record still has to support the dialysis care behind the supply. Billing compliance requirements apply to the facility claim that carries the payment.

1. The dialysis prescription: the nephrologist’s order for peritoneal dialysis, naming the solution, dextrose strengths and exchange schedule.
2. The plan of care: the facility’s current plan for the home or in-center peritoneal dialysis patient.
3. Delivery records: what was shipped to the patient, including bag volumes, so the volume band can be checked against the code.
4. Treatment records: home dialysis logs or flowsheets showing the exchanges the patient performed.

A post-payment reviewer looks for these records on the facility side. A supply invoice on its own does not show the clinical need.

Payer coverage beyond Medicare for A4723

Medicare is the primary payer for most patients with ESRD. Medicaid and commercial plans sit alongside it for some patients, and their policies on dialysis supplies vary.

• Medicaid: Many state programs follow the ESRD bundle for dialysis supplies. Check your state agency’s bundled code list before submitting A4723 on its own line.
• Medicare Advantage: Plans pay dialysis facilities under their own contracts. Read the plan’s dialysis policy rather than assuming the Original Medicare rule.
• Commercial payers: Some fold dialysate into the dialysis payment, and some accept it as a separate supply. Confirm the plan’s supply policy before the first claim.

Common billing mistakes with HCPCS code A4723

Most A4723 errors trace back to treating the code as an ordinary DMEPOS supply. These are the ones that recur.

• Billing it to the DME MAC: CMS lists A4723 among the ESRD supplies not payable to DME suppliers. The claim is denied on receipt. A denial management process that flags the bundling denial stops the same claim going out again.
• Using it for hemodialysis: The descriptor names peritoneal dialysis. Hemodialysis concentrates have their own codes, such as A4706 to A4709.
• Picking the band from the prescription: The code follows the bag’s fill volume. A prescribed 2,500 cc exchange does not make a 3,000 cc bag an A4722.
• Inventing a per-1,000 ml unit: The descriptor sets a volume band, not a per-liter unit. Do not divide total milliliters by 1,000 to build a unit count.

How Pabau keeps peritoneal dialysis supply records ready for review

Dialysis supply questions usually arrive months after the bags were shipped. By then, the prescription, the delivery record and the home treatment log often sit in three different places. Someone then spends an afternoon matching them up.

Pabau, the practice management and EHR platform we build, keeps those records on one patient file. The order, the treatment notes and the forms your team completes attach to the patient they belong to. Pabau does not choose or check the code for you.

Where a payer does accept a claim, Pabau’s claims tools for billing teams submit it through the Claim.MD integration. It then tracks the claim status and the remittance that comes back. The coding decisions in this guide stay with your billing team.

Keep dialysis supply records ready for review

Pabau keeps the dialysis order, treatment notes and forms on one patient record. Where a payer accepts a claim, it submits it through Claim.MD and tracks the status.

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Conclusion

A4723 is a narrow code with a simple test. The bag holds dextrose dialysate for peritoneal dialysis, and its fill volume sits above 2999 cc and up to 3999 cc. If either fact fails, a neighboring code applies.

The payment question is settled before any claim is built. Medicare pays the ESRD facility, and a DME supplier claim for A4723 is denied. The effort belongs in the facility record and in each non-Medicare payer’s supply policy.

Peritoneal dialysis programs generate a lot of paperwork per patient, and the record is where the time goes. Book a demo to see how Pabau keeps orders, notes and claim tracking on one patient record.

Continue your research

Coding the next bag size down? A4722 covers dextrose dialysate above 1999 cc and up to 2999 cc.

Coding the next bag size up? A4724 covers dextrose dialysate above 3999 cc and up to 4999 cc.

Working with non-dextrose solution? A4728 applies the same bundling rule to non-dextrose dialysate.

Billing peritoneal dialysis tubing? A4719 explains how consolidated billing treats the Y set tubing code.

Cleaning dialysis equipment? A4674 is the code for chemicals and antiseptic solution used on dialysis equipment.

Frequently asked questions