John FassioMD
John Fassio, MD is an Ophthalmology provider in Park City, UT affiliated with 3 ambulatory surgery centers in UT, as of July 2026.
- NPI1689671638
- Registered2005
- Centers3
- StateUT
- Class of1989
Case volumes, referral patterns, and payer mix live in DataLily AI Insights.
Ambulatory surgery centers
Centers whose service lines match this provider’s. Affiliations change; verify independently.
- St Marks Ambulatory Surgery Associates LpSalt Lake City, UT · ENT, General surgery, Ophthalmology, Orthopedics, Pain management, Plastic surgery, Urology · 30 on panelView center →
- Physicians Surgery CenterSalt Lake City, UT · Ophthalmology · 30 on panelView center →
- Avenues Surgical CenterSalt Lake City, UT · Ophthalmology · 30 on panelView center →
Education
Education on record as of August 2026.
John Fassio at a glance
- Provider
- John Fassio
- Credential
- MD
- Specialty
- Ophthalmology
- Procedures
- Ophthalmology CPT codes
- Location
- Park City, UT
- Medical school
- University of Louisville School of Medicine
- Graduated
- 1989
- NPI registered
- 2005
- NPI
- 1689671638
- 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 Fassio practice?
John Fassio, MD is based in Park City, UT and is affiliated with 3 ambulatory surgery centers: St Marks Ambulatory Surgery Associates Lp in Salt Lake City, UT, Physicians Surgery Center in Salt Lake City, UT, and Avenues Surgical Center in Salt Lake City, UT. Affiliations reflect the current DataLily AI snapshot (July 2026) and can change.
What is John Fassio's NPI number?
John Fassio's National Provider Identifier (NPI) is 1689671638, registered in 2005. Specialty on record: Ophthalmology; credential MD.
Where did John Fassio go to medical school?
John Fassio, MD attended University of Louisville School of Medicine, graduating in 1989.
How many Ophthalmology providers in Utah work at ambulatory surgery centers?
107 Ophthalmology surgeons and proceduralists in Utah are affiliated with ambulatory surgery centers in DataLily AI's current snapshot, John Fassio among them. The Utah Ophthalmology directory lists each one by city with credential, NPI, and center affiliations.
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