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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 Merkle:

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Specialties & Research

Dr. John Merkle, MD is board certified in Diagnostic Radiology.

Education & Awards

Dr. Merkle graduated from Southern Illinois University, Springfield.


Dr. Merkle has 4 hospital affiliations:

  • Ste Genevieve County Memorial Hospital 
  • Perry County Memorial Hospital 

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Additional Information
Dr. John Alan Merkle MD is a male Diagnostic Radiologist, has 32 years of experience and practices in Diagnostic Radiology.
Where does Dr. John A. Merkle practice?
Dr. John Merkle has 3 office locations.
Dr. John Merkle practices Diagnostic Radiology near Saint Louis, MO.
Additional practice locations include: Sainte Genevieve, MO.
See Saint Louis Radiologists.