John CastorMD
John Castor, MD is a Gastroenterology provider in Columbus, OH affiliated with 4 ambulatory surgery centers in OH, as of July 2026.
- NPI1093987257
- Registered2008
- Centers4
- StateOH
- Class of2005
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.
- Knightsbridge Surgery CenterColumbus, OH · Gastroenterology, General surgery, Urology · 30 on panelView center →
- Central Ohio Endoscopy Center LLCWesterville, OH · Gastroenterology · 3 on panelView center →
- Central Ohio Endoscopy Center LLCPickerington, OH · Gastroenterology · 5 on panelView center →
- Central Ohio Endoscopy Center LLCColumbus, OH · Gastroenterology · 30 on panelView center →
Education
Education on record as of August 2026.
John Castor at a glance
- Provider
- John Castor
- Credential
- MD
- Specialty
- Gastroenterology
- Procedures
- Gastroenterology CPT codes
- Location
- Columbus, OH
- Medical school
- Clvlnd Clinic Lerner College of Med of Case Wstn Rsv University
- Graduated
- 2005
- NPI registered
- 2008
- NPI
- 1093987257
- 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 Castor practice?
John Castor, MD is based in Columbus, OH and is affiliated with 4 ambulatory surgery centers: Knightsbridge Surgery Center in Columbus, OH, Central Ohio Endoscopy Center LLC in Westerville, OH, Central Ohio Endoscopy Center LLC in Pickerington, OH, and Central Ohio Endoscopy Center LLC in Columbus, OH. Affiliations reflect the current DataLily AI snapshot (July 2026) and can change.
What is John Castor's NPI number?
John Castor's National Provider Identifier (NPI) is 1093987257, registered in 2008. Specialty on record: Gastroenterology; credential MD.
Where did John Castor go to medical school?
John Castor, MD attended Clvlnd Clinic Lerner College of Med of Case Wstn Rsv University, graduating in 2005.
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 Castor among them. The Ohio Gastroenterology directory lists each one by city with credential, NPI, and center affiliations.
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