Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. John W Mah, MD

Individual provider Surgery Physician · NPI 1316040272

Dr. John W Mah, MD is a General Surgery in Hartford, Connecticut. Graduated from Sanford School of Medicine of University of South Dakota in 1998, 28 years ago. Practices with Hartford Hospital, a 1,040-clinician group and accepts Medicare assignment. Licensed in Connecticut.

Years since qualifying
28
Trained at
Sanford School of Medicine of University of South Dakota
Licensed in
CT
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

80 Seymour Street Hartford Hospital Surgery Dept
Hartford, CT 06102
Phone: (860) 545-5152
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Surgery Physician (primary) Taxonomy 208600000X · Licence 041522 (CT)

Record details

NPI number1316040272
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedSeptember 6, 2006
Last updated in NPPESFebruary 25, 2008
Mailing addressHartford Hospita Professional Services, Po Box 40,000 Dept 634, Hartford, CT 06151-0634

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyGENERAL SURGERY
Also practisesCRITICAL CARE (INTENSIVISTS)
Medical schoolSANFORD SCHOOL OF MEDICINE OF UNIVERSITY OF SOUTH DAKOTA
Graduated 1998 (28 years in practice)
Group practice Hartford Hospital — 1040 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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