Theodore SyMD
Gastroenterology·Laguna Hills, CA
Theodore Sy, MD is a Gastroenterology provider in Laguna Hills, CA affiliated with 4 ambulatory surgery centers in CA, as of July 2026.
- NPI1003865627
- Registered2006
- Centers4
- StateCA
- Class of2003
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.
- Mile Square Surgery Center INCFountain Valley, CA · Gastroenterology, Pain management · 13 on panelView center →
- Memorial Care Surgical Center At Orange Coast LLCFountain Valley, CA · Gastroenterology, General surgery, Ophthalmology, Orthopedics, Pain management · 30 on panelView center →
- Digestive Disease Center LpLaguna Hills, CA · Gastroenterology · 5 on panelView center →
- Pavilion Surgery CenterOrange, CA · Gastroenterology, General surgery, Ophthalmology, Pain management, Plastic surgery, Urology · 30 on panelView center →
Education
Education on record as of August 2026.
Theodore Sy at a glance
- Provider
- Theodore Sy
- Credential
- MD
- Specialty
- Gastroenterology
- Procedures
- Gastroenterology CPT codes
- Location
- Laguna Hills, CA
- Medical school
- Northwestern University Feinberg Medical School
- Graduated
- 2003
- NPI registered
- 2006
- NPI
- 1003865627
- 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 Theodore Sy practice?
Theodore Sy, MD is based in Laguna Hills, CA and is affiliated with 4 ambulatory surgery centers: Mile Square Surgery Center INC in Fountain Valley, CA, Memorial Care Surgical Center At Orange Coast LLC in Fountain Valley, CA, Digestive Disease Center Lp in Laguna Hills, CA, and Pavilion Surgery Center in Orange, CA. Affiliations reflect the current DataLily AI snapshot (July 2026) and can change.
What is Theodore Sy's NPI number?
Theodore Sy's National Provider Identifier (NPI) is 1003865627, registered in 2006. Specialty on record: Gastroenterology; credential MD.
Where did Theodore Sy go to medical school?
Theodore Sy, MD attended Northwestern University Feinberg Medical School, graduating in 2003.
How many Gastroenterology providers in California work at ambulatory surgery centers?
547 Gastroenterology surgeons and proceduralists in California are affiliated with ambulatory surgery centers in DataLily AI's current snapshot, Theodore Sy among them. The California Gastroenterology directory lists each one by city with credential, NPI, and center affiliations.
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