In short

Fragmin is billed under HCPCS J1645 — Injection, dalteparin sodium, per 2500 iu. One billing unit is 2500 IU. CMS's crosswalk lists 9 Fragmin NDCs under this code.

J1645 code details

Reference

J1645
Injection, dalteparin sodium, per 2500 iuBilling unit: 2500 IU
Labelers
Pfizer Inc

Medicare Part B payment limit

CMS ASP file
Payment limit per unit$45.668
Per2500 iu
Coinsurance4.812%

Effective 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

Fragmin units and claim line

Enter the dose given to get the J1645 units and the NDC line for the CMS-1500 and the 837P.

Enter the units to build the claim line.

Fragmin 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.

Fragmin NDCs in the CMS ASP crosswalk
NDC (11-digit)HCPCSLabelerPackageBilling units per package
00069-0195-02J1645Pfizer Inc10 × 0.210
00069-0196-02J1645Pfizer Inc10 × 0.220
00069-0206-02J1645Pfizer Inc10 × 0.330
00069-0217-02J1645Pfizer Inc10 × 140
00069-0220-02J1645Pfizer Inc10 × 0.550
00069-0223-02J1645Pfizer Inc10 × 0.660
00069-0228-02J1645Pfizer Inc10 × 0.7272
00069-0232-01J1645Pfizer Inc3.838
00069-0253-10J1645Pfizer Inc10 × 440

Fragmin: common questions

What is the J-code for Fragmin?
Fragmin is billed under HCPCS J1645 — Injection, dalteparin sodium, per 2500 iu. One billing unit is 2500 IU. CMS's crosswalk lists 9 Fragmin NDCs under this code.
How many J1645 billing units are in a package of Fragmin?
CMS lists 10 to 72 billing units per package, depending on the NDC, where one unit is 2500 IU. Units to report are based on the dose given, not the package.
Is J1645 a CPT code?
No. J1645 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.

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