John OneillMD
Dermatology·Bethesda, MD
John Oneill, MD is a Dermatology provider in Bethesda, MD, as of July 2026.
- NPI1184635575
- Registered2006
- Class of1982
Case volumes, referral patterns, and payer mix live in DataLily AI Insights.
Education
Education on record as of August 2026.
John Oneill at a glance
- Provider
- John Oneill
- Credential
- MD
- Specialty
- Dermatology
- Location
- Bethesda, MD
- Medical school
- Georgetown University School of Medicine
- Graduated
- 1982
- NPI registered
- 2006
- NPI
- 1184635575
- 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 Oneill practice?
John Oneill, MD is based in Bethesda, MD. Affiliations reflect the current DataLily AI snapshot (July 2026) and can change.
What is John Oneill's NPI number?
John Oneill's National Provider Identifier (NPI) is 1184635575, registered in 2006. Specialty on record: Dermatology; credential MD.
Where did John Oneill go to medical school?
John Oneill, MD attended Georgetown University School of Medicine, graduating in 1982.
How many Dermatology providers in Maryland work at ambulatory surgery centers?
65 Dermatology surgeons and proceduralists in Maryland are affiliated with ambulatory surgery centers in DataLily AI's current snapshot, John Oneill among them. The Maryland Dermatology directory lists each one by city with credential, NPI, and center affiliations.
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