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A medical license is required for a doctor to practice medicine in a particular state. Requirements vary by state but most require, at a minimum, post-graduate training in the doctor’s specific specialty. An NPI number is a national identifier unique to an individual health care provider and is managed by the Center for Medicare & Medicaid Services (CMS).

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Additional Information
Dr. Michael John Barnes MD is a male Pathologist and practices in Pathology and Clinical Pathology/Laboratory Medicine.
Where does Dr. Michael J. Barnes practice?
Dr. Michael Barnes has 1 office location.
Dr. Michael Barnes practices Pathology and Clinical Pathology/Laboratory Medicine near San Francisco, CA.
See San Francisco Pathologists.