Andreas StefanM.D.
Andreas Stefan, M.D. is a Gastroenterology provider in Portland, ME affiliated with 2 ambulatory surgery centers in ME, as of July 2026.
- NPI1831299460
- Registered2006
- Centers2
- StateME
- Class of1991
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.
Education
Education on record as of August 2026.
Andreas Stefan at a glance
- Provider
- Andreas Stefan
- Credential
- M.D.
- Specialty
- Gastroenterology
- Procedures
- Gastroenterology CPT codes
- Location
- Portland, ME
- Medical school
- University of Minnesota Medical School
- Graduated
- 1991
- NPI registered
- 2006
- NPI
- 1831299460
- 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 Andreas Stefan practice?
Andreas Stefan, 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 Andreas Stefan's NPI number?
Andreas Stefan's National Provider Identifier (NPI) is 1831299460, registered in 2006. Specialty on record: Gastroenterology; credential M.D.
Where did Andreas Stefan go to medical school?
Andreas Stefan, M.D. attended University of Minnesota Medical School, graduating in 1991.
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, Andreas Stefan among them. The Maine Gastroenterology directory lists each one by city with credential, NPI, and center affiliations.
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