US · guidance
CMS Pub. 100-04, ch. 13, § 20.3.2
Billing for Services
A physician or other supplier may bill and receive Part B payment for the technical component (TC) or
professional component (PC) of diagnostic tests which the physician or other supplier contracts a
physician, medical group, or other supplier to perform. (This claim and payment procedure does not
extend to clinical diagnostic laboratory tests.) The anti-markup rule will apply to the TC or PC of
diagnostic tests that have been ordered by the billing physician or other supplier (or by a party
financially related to the billing physician or other supplier through common ownership or control) if the
performing physician or other supplier does not meet the criteria for “sharing a practice” with the
ordering/billing entity. An example is when the attending physician orders radiology tests from a
radiologist and the radiologist purchases the tests from an imaging center with whom the radiologist
does not meet the criteria for “sharing a practice.” Under the anti-markup payment limitation, the billing
physician or other supplier may not mark up the charge for a test from the acquisition price and must
accept as full payment for the test (even if assignment is not accepted) the lowest of: the fee schedule
amount as if the performing physician or other supplier had billed directly, the billing entity’s actual
charge, or the performing physician or other supplier’s net charge to the billing entity. The billing
physician or other supplier must be financially related to the physician or group that ordered the tests
through common ownership or control.
If the performing physician or other supplier meets the criteria for “sharing a practice” with the billing
physician or other supplier, then the anti-markup payment limitation will not apply and the lower of the
physician fee schedule amount or the billed amount will be paid.
The physician or other supplier that performed the component that is subject to the anti-markup rule
must be enrolled in the Medicare program. No formal reassignment is necessary; however, reassigned
services are also subject to the anti-markup payment limitation.
A. Radiology Services
Contractors shall apply the anti-markup payment limitation to the TC and PC of radiology diagnostic
testing services other than screening mammography procedures. See Publication 100-04, chapter 1,
§30.2.9 for more information on the anti-markup payment limitation.
B. Payment to a Physician or Other Supplier of Diagnostic Tests for Services Subject to the Anti-Markup Payment Limitation
A physician or other supplier that provides diagnostic tests may bill and receive the Part B payment for
the TC or PC of diagnostic tests which that physician or other supplier acquires from another physician,
medical group, or other supplier. If the performing physician does not meet the requirements for sharing
a practice with the ordering/billing physician or other supplier, then the anti-markup payment limitation
rules will apply. (See section 30.2.9 of this chapter for more information.) If the performing physician is
deemed to share a practice with the physician or other supplier that ordered the test, then the physician
fee schedule amount may be billed and the anti-markup payment limitation will not apply. In either
case, the performing physician or other supplier must be enrolled in the Medicare program. No formal
reassignment is necessary; however, the anti-markup payment limitation will apply to reassigned
services.
If the anti-markup rules apply, payment may not exceed the lowest of the following amounts:
• The performing physician or other supplier’s net charge to the billing physician or other
supplier;*
• The billing physician or other supplier’s actual charges; or
• The fee schedule amount allowed for the test if the performing physician or other supplier billed
directly.
*The net charge must be determined without regard to any charge that is intended to reflect the cost of
equipment or space leased to the performing physician or supplier by or through the billing entity. For
more information, see Pub. 100-04, chapter 1, §30.2.9.
The billing physician or other supplier must keep on file the name, address, and NPI of the physician or
other supplier who performed the anti-markup service.
C. Sanctions
Physicians who knowingly and willfully, in repeated cases, bill Medicare beneficiaries amounts beyond
those outlined in this chapter are subject to the penalties contained under §1842(j)(2) of the Act.
Penalties are assigned after post-pay review depending on the severity.
D. Questionable Business Arrangements
No special charge or payment constraints are imposed on tests performed by a physician or a technician
under the physician’s supervision. There are two requirements for all diagnostic tests under §1861(s)(3)
of the Act, as implemented by 42 CFR §410.32 and section 10 of chapter13 of this publication and
section 80, chapter 15 of Pub. 100-02BP. Namely, the test must be ordered by the treating practitioner,
and the test must be supervised by a physician. However, attempts may be made by the medical
diagnostic community to adjust or establish arrangements which continue to allow physicians to profit
from other's work or by creating the appearance that the physician has performed or supervised his/her
technicians who are employed, contracted, or leased. Some of these arrangements may involve cardiac
scanning services and mobile ultrasound companies leasing their equipment to physicians for the day the
equipment is used, and hiring out their staff to the physicians to meet the supervision requirement.
The bona fides of such arrangements may be suspect and could be an attempt to circumvent the anti-markup payment limitation. If you have any doubt that a particular arrangement is a valid relationship
where the physician is performing or supervising the services, this should be investigated. The Office of
the Inspector General (OIG) has responsibility for investigating violations of §1842(n) of the Act.
Another arrangement to circumvent the anti-markup payment limitation is for the ordering physician to
reassign his/her payment for the interpretation of the test to the supplier. The supplier, in turn, bills for
both the test and the interpretation and pays the ordering physician a fee for the interpretation. This
arrangement violates §1842(b)(6) of the Act, which prohibits Medicare from paying benefits due the
person that furnished the service to any other person, subject to limited exceptions discussed in Pub.
100-04, chapter 1, §30.2.2. Also, this arrangement could constitute a violation of §1128 B (b) of the
Act, which prohibits remuneration for referrals (i.e., kickbacks).
Violations of §1128B (b) of the Act may subject the physician or supplier to criminal penalties or
exclusion from the Medicare and Medicaid programs. Illegal remuneration for referrals can be found
even when the ordering physician performs some service for the remuneration.
History
(Rev. 1931, Issued: 03-12-10, Effective: 06-14-10, Implementation: 06-14-10)
Provenance
- Source
- cms.gov
- Retrieved
- 2026-08-25
- Edition
- iom-2026-08-25
- Content hash
4366f48ad1123f9be26846600f3e5265c1d8a41d604b3ebe8696a8d5835bc1da
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