In short

Imlygic is billed under HCPCS J9325 — Injection, talimogene laherparepvec, per 1 million plaque forming units. One billing unit is 1 million pfu. CMS's crosswalk lists 2 Imlygic NDCs under this code.

J9325 code details

Reference

J9325
Injection, talimogene laherparepvec, per 1 million plaque forming unitsBilling unit: 1 million pfu
Labelers
Amgen Inc

Medicare Part B payment limit

CMS ASP file
Payment limit per unit$77.657
Per1 million pfu
Coinsurance18.53%

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

Imlygic units and claim line

Enter the dose given to get the J9325 units and the NDC line for the CMS-1500 and the 837P.

Enter the units to build the claim line.

Imlygic 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.

Imlygic NDCs in the CMS ASP crosswalk
NDC (11-digit)HCPCSLabelerPackageBilling units per package
55513-0078-01J9325Amgen Inc11
55513-0079-01J9325Amgen Inc1100

Imlygic: common questions

What is the J-code for Imlygic?
Imlygic is billed under HCPCS J9325 — Injection, talimogene laherparepvec, per 1 million plaque forming units. One billing unit is 1 million pfu. CMS's crosswalk lists 2 Imlygic NDCs under this code.
How many J9325 billing units are in a package of Imlygic?
CMS lists 1 to 100 billing units per package, depending on the NDC, where one unit is 1 million pfu. Units to report are based on the dose given, not the package.
Is J9325 a CPT code?
No. J9325 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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