John TzagournisM.D.
John Tzagournis, M.D. is a Gastroenterology provider in Columbus, OH affiliated with 2 ambulatory surgery centers in OH, as of July 2026.
- NPI1508818998
- Registered2006
- Centers2
- StateOH
- Class of1999
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.
John Tzagournis at a glance
- Provider
- John Tzagournis
- Credential
- M.D.
- Specialty
- Gastroenterology
- Procedures
- Gastroenterology CPT codes
- Location
- Columbus, OH
- Medical school
- Ohio State University College of Medicine
- Graduated
- 1999
- NPI registered
- 2006
- NPI
- 1508818998
- 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 John Tzagournis practice?
John Tzagournis, M.D. is based in Columbus, OH and is affiliated with 2 ambulatory surgery centers: Central Ohio Endoscopy Center LLC in Columbus, OH and Downtown Endoscopy Center in Columbus, OH. Affiliations reflect the current DataLily AI snapshot (July 2026) and can change.
What is John Tzagournis's NPI number?
John Tzagournis's National Provider Identifier (NPI) is 1508818998, registered in 2006. Specialty on record: Gastroenterology; credential M.D.
Where did John Tzagournis go to medical school?
John Tzagournis, M.D. attended Ohio State University College of Medicine, graduating in 1999.
How many Gastroenterology providers in Ohio work at ambulatory surgery centers?
184 Gastroenterology surgeons and proceduralists in Ohio are affiliated with ambulatory surgery centers in DataLily AI's current snapshot, John Tzagournis among them. The Ohio Gastroenterology directory lists each one by city with credential, NPI, and center affiliations.
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