Mark DonowitzM.D.
Gastroenterology·Baltimore, MD
Mark Donowitz, M.D. is a Gastroenterology provider in Baltimore, MD affiliated with 1 ambulatory surgery center in MD, as of July 2026.
- NPI1306893342
- Registered2006
- Centers1
- StateMD
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.
Mark Donowitz at a glance
- Provider
- Mark Donowitz
- Credential
- M.D.
- Specialty
- Gastroenterology
- Procedures
- Gastroenterology CPT codes
- Location
- Baltimore, MD
- NPI registered
- 2006
- NPI
- 1306893342
- 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 Mark Donowitz practice?
Mark Donowitz, M.D. is based in Baltimore, MD and is affiliated with 1 ambulatory surgery center: Downtown Baltimore Surgery Center LLC in Baltimore, MD. Affiliations reflect the current DataLily AI snapshot (July 2026) and can change.
What is Mark Donowitz's NPI number?
Mark Donowitz's National Provider Identifier (NPI) is 1306893342, registered in 2006. Specialty on record: Gastroenterology; credential M.D.
How many Gastroenterology providers in Maryland work at ambulatory surgery centers?
170 Gastroenterology surgeons and proceduralists in Maryland are affiliated with ambulatory surgery centers in DataLily AI's current snapshot, Mark Donowitz among them. The Maryland Gastroenterology directory lists each one by city with credential, NPI, and center affiliations.
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