Howard GuanM.D.
Howard Guan, M.D. is an Ophthalmology provider in San Marcos, CA affiliated with 3 ambulatory surgery centers in CA, as of July 2026.
- NPI1134427636
- Registered2011
- Centers3
- StateCA
- Class of2010
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.
- Ucsd Center For Surgery Of Encinitas LpEncinitas, CA · Ophthalmology, Orthopedics, Podiatry · 23 on panelView center →
- Scripps Encinitas Surgery Center LLCEncinitas, CA · Ophthalmology, Orthopedics, Pain management · 14 on panelView center →
- Premiere Surgery Center INCEscondido, CA · Ophthalmology · 7 on panelView center →
Education
Education on record as of August 2026.
Howard Guan at a glance
- Provider
- Howard Guan
- Credential
- M.D.
- Specialty
- Ophthalmology
- Procedures
- Ophthalmology CPT codes
- Location
- San Marcos, CA
- Medical school
- Loma Linda University School of Medicine
- Graduated
- 2010
- NPI registered
- 2011
- NPI
- 1134427636
- 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 Howard Guan practice?
Howard Guan, M.D. is based in San Marcos, CA and is affiliated with 3 ambulatory surgery centers: Ucsd Center For Surgery Of Encinitas Lp in Encinitas, CA, Scripps Encinitas Surgery Center LLC in Encinitas, CA, and Premiere Surgery Center INC in Escondido, CA. Affiliations reflect the current DataLily AI snapshot (July 2026) and can change.
What is Howard Guan's NPI number?
Howard Guan's National Provider Identifier (NPI) is 1134427636, registered in 2011. Specialty on record: Ophthalmology; credential M.D.
Where did Howard Guan go to medical school?
Howard Guan, M.D. attended Loma Linda University School of Medicine, graduating in 2010.
How many Ophthalmology providers in California work at ambulatory surgery centers?
869 Ophthalmology surgeons and proceduralists in California are affiliated with ambulatory surgery centers in DataLily AI's current snapshot, Howard Guan among them. The California Ophthalmology directory lists each one by city with credential, NPI, and center affiliations.
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