US · guidance
CMS Pub. 100-04, ch. 1, § 30.2.11
Payment Under Fee-For-Time Compensation Arrangements
(formerly referred to as Locum Tenens Arrangements) - Claims
Submitted to A/B MACs Part B
(Rev. 3774, 05-12-17, Effective:06-13-17, Implementation: 06-13-17)
A. Background
It is a longstanding practice for a physician to retain a substitute physician to take over
his/her professional practice when the physician is absent for reasons such as illness,
pregnancy, vacation, or continuing medical education, and for such physician (the regular
physician) to bill and receive payment for the substitute physician’s services as though
he/she performed them. The substitute physician often has no practice of his/her own and
may move from area to area as needed. The regular physician generally pays the
substitute physician on a per diem or other fee-for-time compensation basis with the
substitute physician having the status of an independent contractor, rather than of an
employee, of the regular physician.
A regular physician or physical therapist is the physician or physical therapist who is
normally scheduled to see a patient. A regular physician may include a physician
specialist (such as a cardiologist, oncologist, urologist, hospitalist, etc.).
Under section 16006 of the 21st Century Cures Act, a Medicare-enrolled physical
therapist may use a substitute physical therapist to furnish outpatient physical therapy
services in a HPSA, a MUA, or a rural area under a fee-for-time compensation
arrangement on or after June 13, 2017.
B. General requirements applicable to all Fee-For-Time Compensation Arrangements
A patient’s regular physician or physical therapist may submit the claim, and (if
assignment is accepted) receive the Part B payment, for covered visit services of a
substitute physician or physical therapist, if:
• The regular physician or physical therapist is unavailable to provide the services;
• The Medicare beneficiary has arranged or seeks to receive the services from the
regular physician or physical therapist;
• The regular physician or physical therapist pays the substitute for his/her services
on a per diem or similar fee-for-time basis;
• The substitute physician or physical therapist does not provide the services to
Medicare patients over a continuous period of longer than 60 days subject to the
following exception: A physician or physical therapist called to active duty in
the Armed Forces may bill for services furnished under a fee-for-time
compensation arrangement for longer than the 60-day limit; and
• The regular physician or physical therapist indicates that the services were
provided by a substitute physician or physical therapist under a fee-for-time
compensation arrangement meeting the requirements of this section by entering
HCPCS code modifier Q6 (service furnished under a fee-for-time compensation
arrangement by a substitute physician or by a substitute physical therapist
furnishing outpatient physical therapy services in a health professional shortage
area, a medically underserved area, or a rural area) after the procedure code.
If the only services a physician performs in connection with an operation are post-operative services furnished during the period covered by the global fee, these services
need not be identified on the claim as services furnished by a substitute physician.
With respect to physicians, the term “covered visit service” includes not only those
services ordinarily characterized as a covered physician visit, but also any other covered
items and services furnished by the substitute physician or by others as “incident to” the
physician’s services.
With respect to physical therapists, the term “covered visit service” means outpatient
physical therapy services furnished in a HPSA, a MUA, or a rural area. HPSAs and
MUAs are designated by HRSA. To determine if an area is a HPSA or an MUA, visit
HRSA’s website at https://www.hrsa.gov. A rural area is any area that is outside of a
Metropolitan Statistical Area or a Metropolitan Division (in the case where a
Metropolitan Statistical Area is divided into Metropolitan Divisions), as defined by the
Executive Office of Management and Budget, or the following New England counties:
Litchfield County, Connecticut; York County, Maine; Sagadahoc County, Maine;
Merrimack County, New Hampshire; and Newport County, Rhode Island. To determine
if an area is rural, consult the Crosswalk of Counties to Core-Based Statistical Areas in
the most current Inpatient Prospective Payment system final rule. Any area that is not
designated as urban in the crosswalk is rural.
A “continuous period of covered visit services” begins with the first day on which the
substitute physician or physical therapist provides covered visit services to Medicare Part
B patients of the regular physician or physical therapist, and ends with the last day the
substitute physician or physical therapist provides services to such patients before the
regular physician or physical therapist returns to work. This period continues without
interruption on days on which no covered visit services are provided to patients on behalf
of the regular physician or physical therapist or are furnished by some other substitute
physician or physical therapist on behalf of the regular physician or physical therapist. A
new period of covered visit services can begin after the regular physician or physical
therapist has returned to work.
EXAMPLE: The regular physician or physical therapist goes on vacation on June 30,
and returns to work on September 4. A substitute physician or physical therapist
provides services to Medicare Part B patients of the regular physician or physical
therapist on July 2, and at various times thereafter, including August 30 and September 2.
The continuous period of covered visit services begins on July 2 and runs through
September 2, a period of 63 days. Since the September 2 services are furnished after the
expiration of 60 days of the period, the regular physician or physical therapist is not
entitled to bill and receive direct payment for the services furnished August 31 through
September 2. The substitute physician or physical therapist must either bill for the
services furnished August 31 through September 2 in his/her own name and billing
number or reassign payment to the person or group that bills for the services of the
substitute physician or physical therapist. The regular physician or physical therapist
may, however, bill and receive payment for the services that the substitute physician or
physical therapist provides on behalf of the regular physician or physical therapist in the
period July 2 through August 30.
The requirements for the submission of claims under fee-for-time compensation
arrangements are the same for assigned and unassigned claims.
A/B MACs Part B should inform physicians and physical therapists of the compliance
requirements when billing for services of a substitute physician or physical therapist. The
physician/physical therapist notification should state that, in entering the Q6 modifier, the
regular physician or physical therapist (or the medical group or physical therapy group,
where applicable) is certifying that the services are covered visit services furnished by the
substitute physician or physical therapist identified in a record of the regular physician or
physical therapist which is available for inspection, and are services for which the regular
physician or physical therapist (or group) is entitled to submit the claim. A/B MACs Part
B should include in the notice that penalty for false certifications may include civil or
criminal penalties for fraud, or administrative penalties including revocation of the
physician’s or physical therapist’s Medicare billing privileges, right to receive payment,
or to submit claims or accept any assignments. The revocation procedures are set forth
under 42 CFR 424.535 and in the Medicare Program Integrity Manual (Pub. 100-8).
If a line item includes the code Q6 certification, A/B MACs Part B assume that the claim
meets the requirements of this section in the absence of evidence to the contrary. A/B
MACs Part B need not track the 60-day period or validate the billing arrangement on a
prepayment basis, absent postpayment findings that indicate that the Q6 certifications by
a particular regular physician or physical therapist may not be valid.
When A/B MACs Part B make Part B payment under this section, they determine the
payment amount as though the regular physician or physical therapist provided the
services. The identification of the substitute physician or physical therapist is primarily
for purposes of providing documentation to verify upon audit that the services were
furnished, not for purposes of the payment or the limiting charge. Also, notices of
noncoverage are to be given in the name of the regular physician or physical therapist.
C. Requirements applicable to Physician Medical Group or Physical Therapy
Group Claims Under Fee-For-Time Compensation Arrangements
In order for a medical group or physical therapy group to submit claims in the name of
the regular physician or physical therapist for the services of a substitute physician or
physical therapist, the substitute physician or physical therapist may not have reassigned
his or her right to Medicare payment to the group through a CMS-855R reassignment
enrollment form approved by the A/B MACs Part B and the following requirements must
be met:
• The regular physician or physical therapist is unavailable to provide the services;
• The Medicare patient has arranged or seeks to receive the services from the
regular physician or physical therapist; and
• The substitute physician or physical therapist does not provide the services to
Medicare patients over a continuous period of longer than 60 days subject to the
following exception: A physician or physical therapist called to active duty in the
Armed Forces may bill for services furnished under a fee-for-time compensation
arrangement for longer than the 60-day limit.
For purposes of these requirements, per diem or similar fee-for-time compensation which
the group pays the substitute is considered paid by the regular physician or physical
therapist. Also, a physician or physical therapist who has left the group and for whom the
group has engaged a substitute as a temporary replacement may bill for the temporary
physician or physical therapist for up to 60 days. The term “regular physician or physical
therapist” includes a physician or physical therapist who has left the group and for whom
the group has hired the substitute as a replacement.
Services are billed for the entity as follows:
• The medical group or physical therapy group must enter in item 24d of Form
CMS-1500 the HCPCS code modifier Q6 after the procedure code.
• The designated attending physician for a hospice patient (receiving services
related to a terminal illness) bills the Q6 modifier in item 24 of Form CMS-1500
when another group member covers for the attending physician.
• A record of each service provided by the substitute physician or physical therapist
must be kept on file along with the substitute physician’s or physical therapist’s
NPI. This record must be made available to the A/B MACs Part B upon request.
• In addition, the medical group physician or group physical therapist on whose
behalf the services were furnished by a substitute must be identified by his/her
NPI in block 24J of the appropriate line item.
History
(Rev. 3774, 05-12-17, Effective:06-13-17, Implementation: 06-13-17)
Provenance
- Source
- cms.gov
- Retrieved
- 2026-08-25
- Edition
- iom-2026-08-25
- Content hash
a8f1f119675b8624d5d575f0c7abca42fff469e3a23c2af9e269acac4fc5e51b
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