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License & Identifications

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).

Learn more about Dr. John Merwin:

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Specialties & Research

Dr. John Merwin, MD is board certified in Anesthesiology.

Education & Awards

Dr. Merwin graduated from The University of Texas at San Antonio.


Dr. Merwin has 1 hospital affiliations:

  • St Anthonys Medical Center 

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Additional Information
Dr. John David Merwin MD is a male Anesthesiologist, has 26 years of experience and practices in Anesthesiology.
Where does Dr. John D. Merwin practice?
Dr. John Merwin has 9 office locations.
Dr. John Merwin practices Anesthesiology near Saint Louis, MO.
Additional practice locations include: Chesterfield, MO and Bridgeton, MO.
See Saint Louis Anesthesiologists.