Erica JohnstoneM.D.
Obstetrics & Gynecology·San Francisco, CA
Erica Johnstone, M.D. is an Obstetrics & Gynecology provider in San Francisco, CA, as of July 2026.
- NPI1487773263
- Registered2007
- Class of2003
Case volumes, referral patterns, and payer mix live in DataLily AI Insights.
Education
Education on record as of August 2026.
Erica Johnstone at a glance
- Provider
- Erica Johnstone
- Credential
- M.D.
- Specialty
- Obstetrics/Gynecology
- Procedures
- Obstetrics & Gynecology CPT codes
- Location
- San Francisco, CA
- Medical school
- Duke University School of Medicine
- Graduated
- 2003
- NPI registered
- 2007
- NPI
- 1487773263
- 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 Erica Johnstone practice?
Erica Johnstone, M.D. is based in San Francisco, CA. Affiliations reflect the current DataLily AI snapshot (July 2026) and can change.
What is Erica Johnstone's NPI number?
Erica Johnstone's National Provider Identifier (NPI) is 1487773263, registered in 2007. Specialty on record: Obstetrics/Gynecology; credential M.D.
Where did Erica Johnstone go to medical school?
Erica Johnstone, M.D. attended Duke University School of Medicine, graduating in 2003.
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, Erica Johnstone among them. The California Obstetrics & Gynecology directory lists each one by city with credential, NPI, and center affiliations.
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