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

Mark Kenneth Detweiler, MD

Individual provider Gastroenterology Physician · NPI 1548344583

Mark Kenneth Detweiler, MD is a Gastroenterology in Londonderry, New Hampshire. Graduated from Pennsylvania State University College of Medicine in 1979, 47 years ago. Accepts Medicare assignment. Licensed in New Hampshire.

Years since qualifying
47
Trained at
Pennsylvania State University College of Medicine
Licensed in
NH
In the registry since
2006
Specialties on file
2
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

1B Commons Dr Unit 9A
Londonderry, NH 03053-3441
Phone: (603) 818-4712
Fax: (603) 421-6899
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Specialist (primary) Taxonomy 174400000X · Licence 6919 (NH)
Gastroenterology Physician Taxonomy 207RG0100X · Licence 6919 (NH)

Record details

NPI number1548344583
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedOctober 25, 2006
Last updated in NPPESApril 24, 2019
Mailing address1b Commons Dr, Unit 9a, Londonderry, NH 03053-3441

Medicare enrollment

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

Medicare specialtyGASTROENTEROLOGY
Medical schoolPENNSYLVANIA STATE UNIVERSITY COLLEGE OF MEDICINE
Graduated 1979 (47 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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