661,400 vs. 2.6 million jobs

These are the numbers you'll find if you look on the U.S. Bureau of Labor Statistics Office of Occupational Statistics and Employment Projections website at BLS.gov.

In 2008, physicians held 661,400 jobs. There are approximately 2.6 million jobs for nurses.

That's approximately a 1:4 ratio of physicians to nurses.

Physicians and surgeons held about 661,400 jobs in 2008; approximately 12 percent were self-employed. About 53 percent of wage–and-salary physicians and surgeons worked in offices of physicians, and 19 percent were employed by hospitals. Others practiced in Federal, State, and local governments, educational services, and outpatient care centers.

Registered nurses (RNs) constitute the largest healthcare occupation, with 2.6 million jobs. About 60 percent of RN jobs are in hospitals.

Data from the Occupational Outlook Handbook, 2010-11 Edition
Physicians and Surgeons
Registered Nurses