CMS Pub. 100-02, ch. 15, § 80.6.1

Diagnostic Test

A “diagnostic test” includes all diagnostic x-ray tests, all diagnostic laboratory tests, and other diagnostic

tests furnished to a beneficiary.

Treating Physician

A “treating physician” is a physician, as defined in §1861(r) of the Social Security Act (the Act), who

furnishes a consultation or treats a beneficiary for a specific medical problem, and who uses the results of a

diagnostic test in the management of the beneficiary’s specific medical problem.

A radiologist performing a therapeutic interventional procedure is considered a treating physician. A

radiologist performing a diagnostic interventional or diagnostic procedure is not considered a treating

physician.

Treating Practitioner

A “treating practitioner” is a nurse practitioner, clinical nurse specialist, or physician assistant, as defined in

§1861(s)(2)(K) of the Act, who furnishes, pursuant to State law, a consultation or treats a beneficiary for a

specific medical problem, and who uses the result of a diagnostic test in the management of the beneficiary’s

specific medical problem.

Testing Facility

A “testing facility” is a Medicare provider or supplier that furnishes diagnostic tests. A testing facility may

include a physician or a group of physicians (e.g., radiologist, pathologist), a laboratory, or an independent

diagnostic testing facility (IDTF).

Order

An “order” is a communication from the treating physician/practitioner requesting that a diagnostic test be

performed for a beneficiary. The order may conditionally request an additional diagnostic test for a

particular beneficiary if the result of the initial diagnostic test ordered yields to a certain value determined by

the treating physician/practitioner (e.g., if test X is negative, then perform test Y). An order may be

delivered via the following forms of communication:

• A written document signed by the treating physician/practitioner, which is hand-delivered, mailed,

or faxed to the testing facility; NOTE: No signature is required on orders for clinical diagnostic

tests paid on the basis of the clinical laboratory fee schedule, the physician fee schedule, or for

physician pathology services;

• A telephone call by the treating physician/practitioner or his/her office to the testing facility; and

• An electronic mail by the treating physician/practitioner or his/her office to the testing facility.

If the order is communicated via telephone, both the treating physician/practitioner or his/her office, and the

testing facility must document the telephone call in their respective copies of the beneficiary’s medical

records. While a physician order is not required to be signed, the physician must clearly document, in the

medical record, his or her intent that the test be performed.