Medicare Physician Regulation Relief Amendments of 1990 - Amends title XVIII (Medicare) of the Social Security Act to require carriers and peer review organizations to release the medical review screen or the associated screening parameter to a physician before notifying such physician that payment for his or her service has been denied.

Permits Medicare reimbursement of a patient's regular physician for services provided to such patient by another physician who occasionally covers for the regular physician.

Requires Medicare carriers to provide physicians, upon request and without charge, with carrier-generated information which physicians need to submit a payment claim or respond to a carrier inquiry.

Allows a medical society or other professional organization representing physicians to represent a group or class of physicians in Medicare payment determinations, reconsiderations, or appeals.

Directs the Secretary of Health and Human Services to appoint, based on nominations submitted by national medical organizations representing physicians, a Practicing Physicians Advisory Council with which the Secretary must consult concerning changes in the Medicare program and proposed changes in regulations and carrier operation policies.