HCPCS drug code · CMS crosswalk
Cytarabine J-Code / HCPCS Code
In short
Cytarabine is billed under HCPCS J9100 — Injection, cytarabine, 100 mg. One billing unit is 100 mg. CMS's crosswalk lists 9 Cytarabine NDCs under this code.
Reference
- J9100
- Injection, cytarabine, 100 mgBilling unit: 100 mg
- Labelers
- FreseniUS Kabi USA, LLC; Meitheal Pharmaceuticals Inc.; Pfizer Inc; Sagent Pharmaceuticals
Medicare Part B payment limit
CMS ASP filePayment limit per unit$0.853
Per100 mg
Coinsurance20%
Effective 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
Cytarabine units and claim line
Enter the dose given to get the J9100 units and the NDC line for the CMS-1500 and the 837P.
Enter the dose given to build the claim line.
Cytarabine 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 |
|---|---|---|---|---|
| 25021-0223-20 | J9100 | Sagent Pharmaceuticals | 20 | 20 |
| 25021-0229-05 | J9100 | Sagent Pharmaceuticals | 5 × 5 | 5 |
| 61703-0155-01 | J9100 | Pfizer Inc | 20 | 20 |
| 61703-0303-46 | J9100 | Pfizer Inc | 50 | 10 |
| 61703-0304-36 | J9100 | Pfizer Inc | 25 | 5 |
| 61703-0305-38 | J9100 | Pfizer Inc | 5 × 5 | 5 |
| 61703-0319-22 | J9100 | Pfizer Inc | 20 | 20 |
| 63323-0120-20 | J9100 | FreseniUS Kabi USA, LLC | 1 | 20 |
| 71288-0109-20 | J9100 | Meitheal Pharmaceuticals Inc. | 20 | 20 |
Cytarabine: common questions
- What is the J-code for Cytarabine?
- Cytarabine is billed under HCPCS J9100 — Injection, cytarabine, 100 mg. One billing unit is 100 mg. CMS's crosswalk lists 9 Cytarabine NDCs under this code.
- How many J9100 billing units are in a package of Cytarabine?
- CMS lists 5 to 20 billing units per package, depending on the NDC, where one unit is 100 mg. Units to report are based on the dose given, not the package.
- Is J9100 a CPT code?
- No. J9100 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.