HCPCS drug code · CMS crosswalk
Crysvita J-Code / HCPCS Code
In short
Crysvita is billed under HCPCS J0584 — Injection, burosumab-twza 1 mg. One billing unit is 1 mg. CMS's crosswalk lists 3 Crysvita NDCs under this code.
Reference
- J0584
- Injection, burosumab-twza 1 mgBilling unit: 1 mg
- Labelers
- Kyowa Kirin, 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. CMS note: Inflation-adjusted coinsurance. A payment limit is not a coverage decision; the Medicare contractor decides coverage. CMS ASP pricing files
Crysvita units and claim line
Enter the dose given to get the J0584 units and the NDC line for the CMS-1500 and the 837P.
Enter the dose given to build the claim line.
Crysvita 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 |
|---|---|---|---|---|
| 42747-0102-01 | J0584 | Kyowa Kirin, Inc. | 1 | 10 |
| 42747-0203-01 | J0584 | Kyowa Kirin, Inc. | 1 | 20 |
| 42747-0304-01 | J0584 | Kyowa Kirin, Inc. | 1 | 30 |
Crysvita: common questions
- What is the J-code for Crysvita?
- Crysvita is billed under HCPCS J0584 — Injection, burosumab-twza 1 mg. One billing unit is 1 mg. CMS's crosswalk lists 3 Crysvita NDCs under this code.
- How many J0584 billing units are in a package of Crysvita?
- CMS lists 10 to 30 billing units per package, depending on the NDC, where one unit is 1 mg. Units to report are based on the dose given, not the package.
- Is J0584 a CPT code?
- No. J0584 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.