In short

Lyumjev is billed under HCPCS J1813 — Insulin (lyumjev) for administration through dme (i.e., insulin pump) per 50 units. One billing unit is 50 units. CMS's crosswalk lists 2 Lyumjev NDCs under this code.

J1813 code details

Reference

J1813
Insulin (lyumjev) for administration through dme (i.e., insulin pump) per 50 unitsBilling unit: 50 units
Labelers
A-S Medication Solutions; Eli Lilly and Company

Medicare Part B payment limit

CMS ASP file
Payment limit per unit$3.903
Per50 units
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

Lyumjev units and claim line

Enter the dose given to get the J1813 units and the NDC line for the CMS-1500 and the 837P.

Enter the dose given to build the claim line.

Lyumjev 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.

Lyumjev NDCs in the CMS ASP crosswalk
NDC (11-digit)HCPCSLabelerPackageBilling units per package
00002-7728-01J1813Eli Lilly and Company1020
50090-7433-00J1813A-S Medication Solutions1020

Lyumjev: common questions

What is the J-code for Lyumjev?
Lyumjev is billed under HCPCS J1813 — Insulin (lyumjev) for administration through dme (i.e., insulin pump) per 50 units. One billing unit is 50 units. CMS's crosswalk lists 2 Lyumjev NDCs under this code.
How many J1813 billing units are in a package of Lyumjev?
CMS lists 20 billing units per package, depending on the NDC, where one unit is 50 units. Units to report are based on the dose given, not the package.
Is J1813 a CPT code?
No. J1813 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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