A4771 HCPCS code: Serum clotting time tube, for dialysis, per 50
A4771 is the HCPCS Level II code for serum clotting time tube, for dialysis, per 50. Its Medicare coverage code is D (Special coverage instructions apply): Medicare covers it when its national or local coverage criteria are met.
Code details
| Field | Value |
|---|---|
| Section | A codes — Transportation, medical/surgical supplies and miscellaneous |
| Coverage code | D — Special coverage instructions apply |
| Pricing indicator | 00 — Not separately priced by Medicare |
| BETOS category | P9B |
| Added | 1986-01-01 |
| Last action effective | 2015-01-01 |
What changed for A4771
- 1986-01-01: A4771 added to HCPCS Level II
- Next scheduled CMS quarterly update (HCPCS and DMEPOS fee schedule): 2027-01-01
Frequently asked questions
What is HCPCS code A4771?
A4771 is the HCPCS Level II code for serum clotting time tube, for dialysis, per 50. Short descriptor: "Serum clotting time tube".
Does Medicare cover A4771?
Coverage code D — Special coverage instructions apply. Medicare covers it when its national or local coverage criteria are met.
Related A47 codes
- A4706 — Bicarbonate concentrate, solution, for hemodialysis, per gallon
- A4707 — Bicarbonate concentrate, powder, for hemodialysis, per packet
- A4708 — Acetate concentrate solution, for hemodialysis, per gallon
- A4709 — Acid concentrate, solution, for hemodialysis, per gallon
- A4714 — Treated water (deionized, distilled, or reverse osmosis) for peritoneal dialysis, per gallon
- A4719 — "y set" tubing for peritoneal dialysis
- A4720 — Dialysate solution, any concentration of dextrose, fluid volume greater than 249 cc, but less than or equal to 999 cc, for peritoneal dialysis
- A4721 — Dialysate solution, any concentration of dextrose, fluid volume greater than 999 cc but less than or equal to 1999 cc, for peritoneal dialysis
- A4722 — Dialysate solution, any concentration of dextrose, fluid volume greater than 1999 cc but less than or equal to 2999 cc, for peritoneal dialysis
- A4723 — Dialysate solution, any concentration of dextrose, fluid volume greater than 2999 cc but less than or equal to 3999 cc, for peritoneal dialysis
- A4724 — Dialysate solution, any concentration of dextrose, fluid volume greater than 3999 cc but less than or equal to 4999 cc, for peritoneal dialysis
- A4725 — Dialysate solution, any concentration of dextrose, fluid volume greater than 4999 cc but less than or equal to 5999 cc, for peritoneal dialysis
Building a device that would bill under a code like this? Caduvo matches a device description to HCPCS/CPT codes, Medicare coverage and payment, and the FDA pathway in one report.
Next steps
- Run a reimbursement report for a device billed under A4771
- Watch A4771 for fee, coverage and descriptor changes
- Build a full Medicare revenue model for A4771
Sources: CMS HCPCS Level II release October 2026; CMS DMEPOS fee schedule; CMS NCCI MUE tables; CMS Medicare utilization (physician and DME supplier files); CMS Medicare Coverage Database articles. Fees are Medicare allowables, not commercial rates. Not billing or legal advice.