HCPCS drug code · CMS crosswalk
Crofab J-Code / HCPCS Code
In short
Crofab is billed under HCPCS J0840 — Injection, crotalidae polyvalent immune fab (ovine), up to 1 gram. One billing unit is up to 1 gm. CMS's crosswalk lists 1 Crofab NDC under this code.
Reference
- J0840
- Injection, crotalidae polyvalent immune fab (ovine), up to 1 gramBilling unit: up to 1 gm
- Labelers
- BTG International 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
Crofab units and claim line
Enter the dose given to get the J0840 units and the NDC line for the CMS-1500 and the 837P.
Enter the units to build the claim line.
Crofab 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 |
|---|---|---|---|---|
| 50633-0110-12 | J0840 | BTG International Inc. | 2 × 1 | 2 |
Crofab: common questions
- What is the J-code for Crofab?
- Crofab is billed under HCPCS J0840 — Injection, crotalidae polyvalent immune fab (ovine), up to 1 gram. One billing unit is up to 1 gm. CMS's crosswalk lists 1 Crofab NDC under this code.
- How many J0840 billing units are in a package of Crofab?
- CMS lists 2 billing units per package, depending on the NDC, where one unit is up to 1 gm. Units to report are based on the dose given, not the package.
- Is J0840 a CPT code?
- No. J0840 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.