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

Mr. Mark Stephen St Marie, MD

Individual provider Gastroenterology Physician · NPI 1629150792

Mr. Mark Stephen St Marie, MD is a Gastroenterology in Williamsville, New York. Qualified in 1976, 50 years ago. Practices with General Physician PC, a 487-clinician group, accepts Medicare assignment and offers telehealth. Licensed in New York.

Years since qualifying
50
Licensed in
NY
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

111 N Maplemere Rd Ste 200
Williamsville, NY 14221-3182
Phone: (716) 626-2644
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence 136312 (NY)

Record details

NPI number1629150792
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedOctober 19, 2006
Last updated in NPPESAugust 27, 2024
Certification dateAugust 21, 2024

Medicare enrollment

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

Medicare specialtyGASTROENTEROLOGY
Also practisesINTERNAL MEDICINE
Medical schoolOTHER
Graduated 1976 (50 years in practice)
Group practice General Physician Pc — 487 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

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