Medicare Claims Processing Manual (Pub. 100-04), Ch. 3 § 100.3
Resident and Interns Not Under Approved Teaching Programs
100.3 - Resident and Interns Not Under Approved Teaching Programs
(Rev. 1, 10-01-03)
A3-3669
A. - General
A provider's cost for the services furnished by residents and interns not under approved
teaching programs (including physicians employed by the provider who are authorized to
practice only in a provider setting) are covered under Part B. (Part A covers only the costs of
services performed for inpatients by residents and interns who are under approved teaching
programs.) See the Medicare Benefit Policy Manual, Chapter 6 for further information on the
coverage of these services.
The provider determines that part of the inpatient charges which represents the cost of the
services of residents and interns who are not under approved teaching programs and bills
these separately under Part B, using type of bill code 121 and revenue code 096X, 097X, or
098X as applicable.
B. - Provider Procedures
The cost of Part B residents' and interns' services to inpatients is calculated on a per diem
basis by the hospital in consultation with its A/B MAC (A). The A/B MAC (A) apportions
the total cost of such services (including fringe benefits, etc.) between inpatient and
outpatient services on the basis of the time spent on each. It obtains the inpatient per diem
figure by dividing the total annual inpatient cost for these services by the estimated annual
number of inpatient days for all patients.
For the patients who are enrolled under Part B, regardless of whether Part A benefits are
payable, the provider is reimbursed for 80 percent of the cost of providing these services.
The provider collects or bills the complementary insurer for 20 percent of the per diem rate
for the services of residents and interns covered under Part B times the number of inpatient
days provided. The administrative cost of determining Part B deductible status involving the
cost of query, response, recording, and accounting on an individual basis in the aggregate,
exceeds the potential patient deductible obligation. Therefore, as long as the patient is
entitled to Part A benefits no determination of the patient's deductible liability need to be
made for inpatient Part B interns' and residents' services.
Patients not enrolled under Part B are liable for the entire cost of intern and resident services.
The provider maintains a record of the inpatient days of these individuals so that this cost
may be excluded from the amount of program obligation at the time of final cost settlement.
C. - A/B MAC (A) Procedures
Its A/B MAC (A) assists the provider in arriving at the inpatient per diem rate for the cost of
services covered under Part B provided by residents and interns. (See the Provider
Reimbursement Manual, Part I, §2120 for apportioning costs between inpatient and
outpatient per diem and §2406 for establishing interim rates.) The normal interim
reimbursement rate applied to other provider services applies to Part B residents' and interns'
services.