How does Medicare define physician services for providers?

The rule, word for word

“A. General Physician services are the professional services performed by a physician or physicians for a patient including diagnosis, therapy, surgery, consultation, and care plan oversight. The physician must render the service for the service to be covered. (See Pub. 100-01, Medicare General Information, Eligibility, and Entitlement Manual, Chapter 5, §70, for definition of physician.) A service may be considered to be a physician’s service where the physician either examines the patient in person or is able to visualize some aspect of the patient’s condition without the interposition of a third person’s judgment. Direct visualization would be possible by means of x-rays, electrocardiogram and electroencephalogram tapes, tissue samples, etc. For example, the interpretation by a physician of an actual electrocardiogram or electroencephalogram reading that has been transmitted via telephone (i.e., electronically rather than by means of a verbal description) is a covered service. Professional services of the physician are covered if provided within the United States, and may be performed in a home, office, institution, or at the scene of an accident. A patient’s home, for this purpose, is anywhere the patient makes his or her residence, e.g., home for the aged, a nursing home, a relative’s home. B. Consultations As of January 1, 2010, CMS no longer recognizes consultation codes [...]”

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