In short

Panhematin is billed under HCPCS J1640 — Injection, hemin, 1 mg. One billing unit is 1 mg. CMS's crosswalk lists 1 Panhematin NDC under this code.

J1640 code details

Reference

J1640
Injection, hemin, 1 mgBilling unit: 1 mg
Labelers
Recordati Rare Diseases Inc.

Medicare Part B payment limit

CMS ASP file
Payment limit per unit$36.05
Per1 mg
Coinsurance18.677%

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

Panhematin units and claim line

Enter the dose given to get the J1640 units and the NDC line for the CMS-1500 and the 837P.

Enter the dose given to build the claim line.

Panhematin 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.

Panhematin NDCs in the CMS ASP crosswalk
NDC (11-digit)HCPCSLabelerPackageBilling units per package
55292-0702-55J1640Recordati Rare Diseases Inc.1336

Panhematin: common questions

What is the J-code for Panhematin?
Panhematin is billed under HCPCS J1640 — Injection, hemin, 1 mg. One billing unit is 1 mg. CMS's crosswalk lists 1 Panhematin NDC under this code.
How many J1640 billing units are in a package of Panhematin?
CMS lists 336 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 J1640 a CPT code?
No. J1640 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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