November 9, 2026
Submitting Claims When the Units of Service Exceed 9,999
When billing for more than 9,999 units of service (UOS) for the same HCPCS code and date of service, suppliers must split the total UOS across multiple claim lines.
Why Splitting is Required
The DME MAC claim processing system allows a maximum of 4 characters in the UOS field (Item 24G on the CMS-1500 paper form or Loop 2400, SV104 on the electronic 837P).
A single claim line can contain no more than 9,999 UOS. If you enter a value greater than 9,999 on a single line, you’ll get a system rejection or claim denial.
Billing over 9,999 Units of Service
When you bill more than 9,999 UOS of the same HCPCS code for a single date of service, split the total units across multiple claim lines.
- Line 1: Report the HCPCS code and bill 9,999 UOS
- Line 2: Report the same HCPCS code and bill the remaining UOS
- Add additional lines if needed
- Do not report more than 9,999 UOS on any individual claim line
Note: When claims are billed in National Council for Prescription Drug Programs (NCPDP) format using National Drug Codes (NDCs), different instructions may apply. For more information, see the CMS NCPDP Companion Document
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Claims with billed amounts exceeding $99,999.99
In addition to the UOS limit, the 837P format accepts a maximum of 7 characters in the dollar-amount field. We’ll reject claims that have a dollar amount greater than $99,999.99. You must submit these as separate claims. See Submitting Claims When the Billed Amount Exceeds $99,999.99 for billing instructions.

