IndividualActive
Howard Guan, M.D.
NPI 1134427636 · Glaucoma Specialist (Ophthalmology) Physician · San Marcos, CA
Provider details
- NPI number
- 1134427636
- Entity type
- Individual
- Primary specialty
- Glaucoma Specialist (Ophthalmology) PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A119766 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Practice location
340 Rancheros Drive
Suites 164/166
San Marcos, CA 92069
Phone: (760) 598-0400
Fax: (760) 290-7044
Approximate (ZIP-level) locationGet directions
Mailing address
340 Rancheros Drive
San Marcos, CA 92069
Registry dates
- Enumerated
- 2011-03-07
- Last updated
- 2025-10-21
- Certified
- 2025-10-21
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.