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Anesthesiologist (pain control)
31 years of experience
Accepting new patients
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).

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Specialties & Research

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

Education & Awards

Dr. Zerwas graduated from Baylor College of Medicine, Houston.


Dr. Zerwas has 7 hospital affiliations:

  • Memorial Hermann Southeast Hospital 
  • Memorial Hermann Katy Hospital 


  • Spanish

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Additional Information
Dr. John Mccall Zerwas MD is a male Anesthesiologist, has 31 years of experience and practices in Anesthesiology.
Where does Dr. John M. Zerwas practice?
Dr. John Zerwas has 1 office location.
Dr. John Zerwas practices Anesthesiology near Houston, TX.
See Houston Anesthesiologists.