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Last Modified: 9/24/2020 Location: FL, PR, USVI Business: Part A, Part B

Coding mileage for ambulance transport

Q: How should we code the number of miles for ground or air ambulance trips?
A: Beginning with dates of service on and after January 1, 2011:
For trips totaling up to 100 covered miles, suppliers must round the total miles up to the nearest tenth of a mile and report the resulting number with the appropriate healthcare common procedure coding system (HCPCS) code for ambulance mileage. The decimal must be used in the appropriate place (e.g., 99.9).
For trips totaling 100 covered miles and greater, suppliers must report mileage rounded up to the next whole number mile without the use of a decimal (e.g., 998.5 miles should be reported as 999).
For trips totaling less than 1 mile, enter a “0” before the decimal (e.g., 0.9).
For mileage HCPCS billed on the ASC X12 837 professional transaction or the CMS-1500 paper form only, contractors shall automatically default to “0.1” units when the total mileage units are missing.
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