In short

Azasan is billed under HCPCS J7500 — Azathioprine, oral, 50 mg. One billing unit is 50 mg. CMS's crosswalk lists 2 Azasan NDCs under this code.

J7500 code details

Reference

J7500
Azathioprine, oral, 50 mgBilling unit: 50 mg
Labelers
Bausch Health US, LLC

Medicare Part B payment limit

CMS ASP file
Payment limit per unit$0.103
Per50 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

Azasan units and claim line

Enter the dose given to get the J7500 units and the NDC line for the CMS-1500 and the 837P.

Enter the dose given to build the claim line.

Azasan 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.

Azasan NDCs in the CMS ASP crosswalk
NDC (11-digit)HCPCSLabelerPackageBilling units per package
65649-0231-41J7500Bausch Health US, LLC100150
65649-0241-41J7500Bausch Health US, LLC100200

Azasan: common questions

What is the J-code for Azasan?
Azasan is billed under HCPCS J7500 — Azathioprine, oral, 50 mg. One billing unit is 50 mg. CMS's crosswalk lists 2 Azasan NDCs under this code.
How many J7500 billing units are in a package of Azasan?
CMS lists 150 to 200 billing units per package, depending on the NDC, where one unit is 50 mg. Units to report are based on the dose given, not the package.
Is J7500 a CPT code?
No. J7500 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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