In short

Alimta is billed under HCPCS J9305 — Injection, pemetrexed, not otherwise specified, 10 mg. One billing unit is 10 mg. CMS's crosswalk lists 2 Alimta NDCs under this code.

J9305 code details

Reference

J9305
Injection, pemetrexed, not otherwise specified, 10 mgBilling unit: 10 mg
Labelers
Eli Lilly and Company

Medicare Part B payment limit

CMS ASP file
Payment limit per unit$1.23
Per10 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

Alimta units and claim line

Enter the dose given to get the J9305 units and the NDC line for the CMS-1500 and the 837P.

Enter the dose given to build the claim line.

Alimta 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.

Alimta NDCs in the CMS ASP crosswalk
NDC (11-digit)HCPCSLabelerPackageBilling units per package
00002-7623-01J9305Eli Lilly and Company150
00002-7640-01J9305Eli Lilly and Company110

Alimta: common questions

What is the J-code for Alimta?
Alimta is billed under HCPCS J9305 — Injection, pemetrexed, not otherwise specified, 10 mg. One billing unit is 10 mg. CMS's crosswalk lists 2 Alimta NDCs under this code.
How many J9305 billing units are in a package of Alimta?
CMS lists 10 to 50 billing units per package, depending on the NDC, where one unit is 10 mg. Units to report are based on the dose given, not the package.
Is J9305 a CPT code?
No. J9305 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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