Patrick CallahanMD
Anesthesiology·Chestertown, MD
Patrick Callahan, MD is an Anesthesiology provider in Chestertown, MD affiliated with 3 ambulatory surgery centers in MD, as of July 2026.
- NPI1447218060
- Registered2006
- Centers3
- StateMD
- 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.
Patrick Callahan at a glance
- Provider
- Patrick Callahan
- Credential
- MD
- Specialty
- Anesthesiology
- Procedures
- Anesthesiology CPT codes
- Location
- Chestertown, MD
- Medical school
- Eastern Virginia Medical School
- Graduated
- 1991
- NPI registered
- 2006
- NPI
- 1447218060
- 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 Patrick Callahan practice?
Patrick Callahan, MD is based in Chestertown, MD and is affiliated with 3 ambulatory surgery centers: Upper Bay Surgery Center LLC in Elkton, MD, Surgery Center Of Easton Lp in Easton, MD, and Umm Shore Surgery Centers in Easton, MD. Affiliations reflect the current DataLily AI snapshot (July 2026) and can change.
What is Patrick Callahan's NPI number?
Patrick Callahan's National Provider Identifier (NPI) is 1447218060, registered in 2006. Specialty on record: Anesthesiology; credential MD.
Where did Patrick Callahan go to medical school?
Patrick Callahan, MD attended Eastern Virginia Medical School, graduating in 1991.
How many Anesthesiology providers in Maryland work at ambulatory surgery centers?
72 Anesthesiology surgeons and proceduralists in Maryland are affiliated with ambulatory surgery centers in DataLily AI's current snapshot, Patrick Callahan among them. The Maryland Anesthesiology directory lists each one by city with credential, NPI, and center affiliations.
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