Brian McguinnessM.D.
Colorectal Surgery·Walnut Creek, CA
Brian Mcguinness, M.D. is a Colorectal Surgery provider in Walnut Creek, CA, as of July 2026.
- NPI1891870770
- Registered2006
- Class of1995
Case volumes, referral patterns, and payer mix live in DataLily AI Insights.
Education
Education on record as of August 2026.
Brian Mcguinness at a glance
- Provider
- Brian Mcguinness
- Credential
- M.D.
- Specialty
- Colorectal Surgery (Proctology)
- Location
- Walnut Creek, CA
- Medical school
- Tulane University School of Medicine
- Graduated
- 1995
- NPI registered
- 2006
- NPI
- 1891870770
- 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 Brian Mcguinness practice?
Brian Mcguinness, M.D. is based in Walnut Creek, CA. Affiliations reflect the current DataLily AI snapshot (July 2026) and can change.
What is Brian Mcguinness's NPI number?
Brian Mcguinness's National Provider Identifier (NPI) is 1891870770, registered in 2006. Specialty on record: Colorectal Surgery (Proctology); credential M.D.
Where did Brian Mcguinness go to medical school?
Brian Mcguinness, M.D. attended Tulane University School of Medicine, graduating in 1995.
How many Colorectal Surgery providers in California work at ambulatory surgery centers?
39 Colorectal Surgery surgeons and proceduralists in California are affiliated with ambulatory surgery centers in DataLily AI's current snapshot, Brian Mcguinness among them. The California Colorectal Surgery directory lists each one by city with credential, NPI, and center affiliations.
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