Loop 2400 SV2/FL 46 | Medicare Billing: CMS-1450 & 837I

Table 41: Loop 2400 SV2/FL 46 Field
Service Units	Source
Enter a numeric measure of services rendered by revenue category or HCPCS code.	Patient or provider records

Generally, the entries in this FL quantify services by revenue code category, like the number of days in a particular type of accommodation or pints of blood. But when HCPCS codes are required for services, the units are equal to the reported number of times the provider performed the procedure or service. Providers should enter the number of covered days, visits, treatments, procedures, and tests.