HCPCS drug code · CMS crosswalk
Pfizerpen J-Code / HCPCS Code
In short
Pfizerpen is billed under HCPCS J2540 — Injection, penicillin g potassium, up to 600,000 units. One billing unit is 600000 units. CMS's crosswalk lists 2 Pfizerpen NDCs under this code.
Reference
- J2540
- Injection, penicillin g potassium, up to 600,000 unitsBilling unit: 600000 units
- Labelers
- Pfizer Inc
Medicare Part B payment limit
CMS ASP fileEffective October 1, 2026 through December 31, 2026. Payment allowance limits subject to the ASP methodology are based on 2Q26 ASP data. A payment limit is not a coverage decision; the Medicare contractor decides coverage. CMS ASP pricing files
Pfizerpen units and claim line
Enter the dose given to get the J2540 units and the NDC line for the CMS-1500 and the 837P.
Enter the dose given to build the claim line.
Pfizerpen NDCs and billing units
From CMS’s ASP NDC–HCPCS crosswalk, effective October 1, 2026 through December 31, 2026. Billing units per package are CMS’s figures for the code’s unit.
| NDC (11-digit) | HCPCS | Labeler | Package | Billing units per package |
|---|---|---|---|---|
| 00049-0420-10 | J2540 | Pfizer Inc | 10 × 1 | 84 |
| 00049-0430-20 | J2540 | Pfizer Inc | 1 | 34 |
Pfizerpen: common questions
- What is the J-code for Pfizerpen?
- Pfizerpen is billed under HCPCS J2540 — Injection, penicillin g potassium, up to 600,000 units. One billing unit is 600000 units. CMS's crosswalk lists 2 Pfizerpen NDCs under this code.
- How many J2540 billing units are in a package of Pfizerpen?
- CMS lists 34 to 84 billing units per package, depending on the NDC, where one unit is 600000 units. Units to report are based on the dose given, not the package.
- Is J2540 a CPT code?
- No. J2540 is a HCPCS Level II code from CMS for the drug itself. Giving it, for example by injection or infusion, is usually reported with a separate CPT administration code.