npidata.org
Products
Provider RadarWatch an area and specialty — weekly alerts on new cliniciansPractice RadarWeekly alerts when new organisations register nearbySpecialtiesEvery NUCC taxonomy, with counts by state and cityStatesProvider counts and breakdowns for all 50 statesPhysician listsMDs and DOs with addresses and phone numbersNP listsNurse practitioners, the fastest-growing groupAPIJSON, delta feed, free tier
Use cases
Healthcare sales prospectingPhysician recruiting and locum staffingMedical device sales territory planningCredentialing and provider verificationHealthcare marketing lists and audience buildingPharmaceutical sales and prescriber targeting
Account
Start freeThree radars and an export a month Sign in Pricing
Explore
Data Labs API
About
About usTermsPrivacyContact us

Search › California › Glaucoma Specialist (Ophthalmology) Physician

Howard Guan, M.D

NPI 1134427636 · on the registry since 2011

Practice

Address
340 Rancheros Drive
Suites 164/166
San Marcos, CA 92069
Phone
(760) 598-0400
Fax
(760) 290-7044
Organisation at this address
Americare Adhc, Inc.
Tory Prestera Md Inc.
Rsf Ophthalmology, Pc
County Of San Diego/Hhsa
Advanced Chiropractic Ctr
Inferred from a shared address, not stated in the registry.
Clinicians at this address
38

Registry record

Primary taxonomy
Glaucoma Specialist (Ophthalmology) Physician
207WX0009X
Also registered as
Ophthalmology Physician
Licence states on file
CA
From the registry's licence fields, which are often incomplete.
Sex
Male
Record last updated
2025-10-21

Source: CMS National Plan and Provider Enumeration System. Registration is not the same as practising, and the registry records no retirement — some people listed here no longer practise. More in California