Medicare Claims Processing Manual (Pub. 100-04), Ch. 19 § 100.12.2
A/B MAC (A)- CAH Ambulance Services - Medicare Part B -
100.12.2 - A/B MAC (A)- CAH Ambulance Services - Medicare Part B -
Payment Policy
(Rev. 2102, Issued: 11-19-10, Effective: 04-01-11, Implementation: 04-04-11)
For dates of service on or after December 21, 2000 and prior to January 1, 2004,
medically necessary ambulance services provided by an IHS CAH or an entity that is
owned and operated by the IHS CAH are paid based on 100 percent of the reasonable
cost if the 35 mile rule for cost-based payment is met. In order for the 35 mile rule to be
met, the IHS CAH or the entity that is owned and operated by the IHS CAH, must be the
only provider or supplier of ambulance services that is located within a 35 mile drive of
the IHS CAH or the entity. Those CAHs that meet the 35 mile rule for cost-based
payment shall report condition code B2 (CAH ambulance attestation) on their bills.
For dates of service on or after January 1, 2004, ambulance services furnished by an IHS
CAH or by an entity that is owned and operated by the IHS CAH are paid based on 101
percent of reasonable cost if the 35 mile rule for cost-based payment is met.
When the 35 mile rule for cost-based payment is not met, the ambulance services
furnished by the IHS CAH or by the entity that is owned and operated by the IHS CAH
are paid based on the ambulance fee schedule.
The IHS CAHs shall notify the A/B MAC (A) whether the ambulance service meets or
does not meet the 35 mile ambulance rule.
The Medicare Part B deductible and coinsurance apply to ambulance services, but are
waived by the IHS.
See Chapter 15, §30.2.3 of Pub. 100-04, Medicare Claims Processing Manual, for more
information on the payment of ambulance claims.