National Provider Identifier Database

HOWARD GUAN, MD – NPI #1134427636
Glaucoma Specialist

An ophthalmologist who specializes in the treatment of glaucoma and other disorders related to increased intraocular pressure and optic nerve damage. This specialty involves the medical and surgical treatment of these conditions.


Contact Information

HOWARD GUAN, MD
340 RANCHEROS DRIVE
SUITES 164/166
SAN MARCOS, CA92069
Phone: 760-598-0400
Fax: 760-290-7044
Website:
Specialty Taxonomy Code
* Glaucoma Specialist 207WX0009X
Ophthalmology 207W00000X

* Indicates primary specialty

NPI Profile & details for HOWARD GUAN

NPI Number 1134427636
Credentials MD
Entity Individual
Enumeration date 03/07/2011
Last updated 10/21/2025 - About 8 months ago
Sole proprietor1 No
Identifiers
  • CA License #: A119766
Hospital affiliation n/a

1 A sole proprietor/sole proprietorship is an individual, and as such, is eligible for a single NPI number. The sole proprietor must apply for the NPI number using his or her own Social Security Number (SSN), not an Employer Identification Number (EIN) even if he/she has an EIN.

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