A bill to require the development of a long-range plan to advance the national attack on diabetes mellitus.

National Diabetes Mellitus Act - Requires the Director of the National Institutes of Health, with the advice of the advisory council to the Director, to establish a National Commission on Diabetes within 60 days of enactment of this Act.

Directs the Commission to formulate a long range plan to combat diabetes mellitus, which shall include a coordinated research program proposed Federal, State, and local programs for screening and detection of diabetes, referral for treatment, and counseling on how to live with diabetes.

Authorizes an appropriation of $1,000,000 to carry out such long-range plan.

Authorizes the Secretary of Health, Education, and Welfare to develop or substantially expand centers for research and training in diabetes mellitus and related endocrine metabolic disorders. Authorizes appropriations of $5,000,000 for fiscal 1975, $7,500,000 for fiscal 1976, and $10,000,000 for fiscal 1977 for such centers.

Directs the Director to establish an Inter-Institute Diabetes Mellitus Coordinating Committee to coordinate the total National Institutes of Health research activities relating to diabetes mellitus.