Matthew GrunwaldM.D.
Matthew Grunwald, M.D. is a Gastroenterology provider in Portland, ME affiliated with 2 ambulatory surgery centers in ME, as of July 2026.
- NPI1689061954
- Registered2015
- Centers2
- StateME
- Class of2015
Case volumes, referral patterns, and payer mix live in DataLily AI Insights.
Ambulatory surgery centers
Centers whose service lines match this provider’s. Affiliations change; verify independently.
Matthew Grunwald at a glance
- Provider
- Matthew Grunwald
- Credential
- M.D.
- Specialty
- Gastroenterology
- Procedures
- Gastroenterology CPT codes
- Location
- Portland, ME
- Medical school graduation
- 2015
- NPI registered
- 2015
- NPI
- 1689061954
- Snapshot
- July 2026
Identity, specialty, and affiliations change over time. This is not an endorsement, and not clinical, billing, or legal advice. Providers may request corrections at founders@datalilyai.com. Read the DataLily AI data methodology.
Questions
Where does Matthew Grunwald practice?
Matthew Grunwald, M.D. is based in Portland, ME and is affiliated with 2 ambulatory surgery centers: Intermed PA Dba Generations in Portland, ME and Portland Endoscopy Center in Portland, ME. Affiliations reflect the current DataLily AI snapshot (July 2026) and can change.
What is Matthew Grunwald's NPI number?
Matthew Grunwald's National Provider Identifier (NPI) is 1689061954, registered in 2015. Specialty on record: Gastroenterology; credential M.D.
How many Gastroenterology providers in Maine work at ambulatory surgery centers?
19 Gastroenterology surgeons and proceduralists in Maine are affiliated with ambulatory surgery centers in DataLily AI's current snapshot, Matthew Grunwald among them. The Maine Gastroenterology directory lists each one by city with credential, NPI, and center affiliations.
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