DOS and unit reporting on CMS 1450 - cpt code A0030, A0040, A0322 AND A0427

F. Line-Item Dates of Service Reporting

Providers are required to report line-item dates of service per revenue code line. This means that they must report two separate revenue code lines for every ambulance trip provided during the billing period along with the date of each trip. This includes situations in which more than one ambulance service is provided to the same beneficiary on the same day. Line-item dates of service are reported in the Service Date field.

NOTE: Information regarding the claim form locator that corresponds to the Service Date is found in Pub. 100-04, Medicare Claims Processing Manual, Chapter 25 – Completing and Processing the Form CMS-1450 Data set.


G. Service Units Reporting

For line items reflecting HCPCS code A0030, A0040, A0050, A0320, A0322, A0324, A0326, A0328, or A0330 (services before January 1, 2001) or code A0426, A0427, A0428, A0429, A0430, A0431, A0432, A0433, or A0434 (services on and after January 1, 2001), providers are required to report in Service Units each ambulance trip provided during the billing period. Therefore, the service units for each occurrence of these HCPCS codes are always equal to one. In addition, for line items reflecting HCPCS code A0380 or A0390, the number of loaded miles must be reported. (See examples below.)

Therefore, the service units for each occurrence of these HCPCS codes are always equal to one. In addition, for line items reflecting HCPCS code A0380, A0390, A0435, or A0436, the number of loaded miles must be reported.