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

Matthew Drew Grunwald, MD

Individual provider Gastroenterology Physician · NPI 1689061954

Matthew Drew Grunwald, MD is a Gastroenterology in Portland, Maine. Qualified in 2015, 11 years ago. Practices with Portland Gastroenterology Associates PA, a 22-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Maine.

Years since qualifying
11
Licensed in
ME
In the registry since
2015
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

161 Marginal Way
Portland, ME 04101-2438
Phone: (207) 773-7964
Fax: (207) 773-9073
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 48 Gilman St, Portland, ME 04102-3004 — (207) 661-4400

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence MD25916 (ME)

Record details

NPI number1689061954
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 23, 2015
Last updated in NPPESDecember 19, 2022
Certification dateDecember 19, 2022
Mailing address161 Marginal Way, Portland, ME 04101-2438

Medicare enrollment

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

Medicare specialtyGASTROENTEROLOGY
Medical schoolOTHER
Graduated 2015 (11 years in practice)
Group practice Portland Gastroenterology Associates Pa — 22 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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