HCPCS drug code · CMS crosswalk
Gammaplex J-Code / HCPCS Code
In short
Gammaplex is billed under HCPCS J1557 — Injection, immune globulin, (gammaplex), intravenous, non-lyophilized (e.g., liquid), 500 mg. One billing unit is 500 mg. CMS's crosswalk lists 6 Gammaplex NDCs under this code.
Reference
- J1557
- Injection, immune globulin, (gammaplex), intravenous, non-lyophilized (e.g., liquid), 500 mgBilling unit: 500 mg
- Labelers
- Bio Products Laboratory
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
Gammaplex units and claim line
Enter the dose given to get the J1557 units and the NDC line for the CMS-1500 and the 837P.
Enter the dose given to build the claim line.
Gammaplex 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 |
|---|---|---|---|---|
| 64208-8234-06 | J1557 | Bio Products Laboratory | 100 | 10 |
| 64208-8234-07 | J1557 | Bio Products Laboratory | 200 | 20 |
| 64208-8234-08 | J1557 | Bio Products Laboratory | 100 | 40 |
| 64208-8235-05 | J1557 | Bio Products Laboratory | 50 | 10 |
| 64208-8235-06 | J1557 | Bio Products Laboratory | 100 | 20 |
| 64208-8235-07 | J1557 | Bio Products Laboratory | 200 | 40 |
Gammaplex: common questions
- What is the J-code for Gammaplex?
- Gammaplex is billed under HCPCS J1557 — Injection, immune globulin, (gammaplex), intravenous, non-lyophilized (e.g., liquid), 500 mg. One billing unit is 500 mg. CMS's crosswalk lists 6 Gammaplex NDCs under this code.
- How many J1557 billing units are in a package of Gammaplex?
- CMS lists 10 to 40 billing units per package, depending on the NDC, where one unit is 500 mg. Units to report are based on the dose given, not the package.
- Is J1557 a CPT code?
- No. J1557 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.
Other codes for the same drug
- J1459Injection, immune globulin (privigen), intravenous, non-lyophilized (e.g., liquid), 500 mg
- J1551Injection, immune globulin (cutaquig), 100 mg
- J1552Injection, immune globulin (alyglo), 500 mg
- J1553Injection, immune globulin (yimmugo), 100 mg
- J1554Injection, immune globulin (asceniv), 500 mg
- J1555Injection, immune globulin (cuvitru), 100 mg
- J1556Injection, immune globulin (bivigam), 500 mg
- J1558Injection, immune globulin (xembify), 100 mg
- J1559Injection, immune globulin (hizentra), 100 mg
- J1561Injection, immune globulin, (gamunex-c/gammaked), non-lyophilized (e.g., liquid), 500 mg