Croix FossumM.D.
Radiation Oncology·San Diego, CA
Croix Fossum, M.D. is a Radiation Oncology provider in San Diego, CA, as of July 2026.
- NPI1104351006
- Registered2017
- Class of2017
Case volumes, referral patterns, and payer mix live in DataLily AI Insights.
Education
Education on record as of August 2026.
Croix Fossum at a glance
- Provider
- Croix Fossum
- Credential
- M.D.
- Specialty
- Radiation Oncology
- Location
- San Diego, CA
- Medical school
- Mayo Medical School
- Graduated
- 2017
- NPI registered
- 2017
- NPI
- 1104351006
- 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 Croix Fossum practice?
Croix Fossum, M.D. is based in San Diego, CA. Affiliations reflect the current DataLily AI snapshot (July 2026) and can change.
What is Croix Fossum's NPI number?
Croix Fossum's National Provider Identifier (NPI) is 1104351006, registered in 2017. Specialty on record: Radiation Oncology; credential M.D.
Where did Croix Fossum go to medical school?
Croix Fossum, M.D. attended Mayo Medical School, graduating in 2017.
How many Radiation Oncology providers in California work at ambulatory surgery centers?
88 Radiation Oncology surgeons and proceduralists in California are affiliated with ambulatory surgery centers in DataLily AI's current snapshot, Croix Fossum among them. The California Radiation Oncology directory lists each one by city with credential, NPI, and center affiliations.
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