John GustafsonM.D.
Obstetrics & Gynecology·Ventura, CA
John Gustafson, M.D. is an Obstetrics & Gynecology provider in Ventura, CA, as of July 2026.
- NPI1003836016
- Registered2006
- Class of1977
Case volumes, referral patterns, and payer mix live in DataLily AI Insights.
Education
Education on record as of August 2026.
John Gustafson at a glance
- Provider
- John Gustafson
- Credential
- M.D.
- Specialty
- Obstetrics/Gynecology
- Procedures
- Obstetrics & Gynecology CPT codes
- Location
- Ventura, CA
- Medical school
- University of Rochester School of Medicine and Dentistry
- Graduated
- 1977
- NPI registered
- 2006
- NPI
- 1003836016
- 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 Gustafson practice?
John Gustafson, M.D. is based in Ventura, CA. Affiliations reflect the current DataLily AI snapshot (July 2026) and can change.
What is John Gustafson's NPI number?
John Gustafson's National Provider Identifier (NPI) is 1003836016, registered in 2006. Specialty on record: Obstetrics/Gynecology; credential M.D.
Where did John Gustafson go to medical school?
John Gustafson, M.D. attended University of Rochester School of Medicine and Dentistry, graduating in 1977.
How many Obstetrics & Gynecology providers in California work at ambulatory surgery centers?
544 Obstetrics & Gynecology surgeons and proceduralists in California are affiliated with ambulatory surgery centers in DataLily AI's current snapshot, John Gustafson among them. The California Obstetrics & Gynecology directory lists each one by city with credential, NPI, and center affiliations.
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