Dr. Howard D. Guan
- Gender: Male
- Experience: 11 years
- Graduated from: Loma Linda University School Of Medicine
- Graduation year: 2010
- Sole propriator: No
- NPI: 1134427636
Dr. Howard D. Guan M.D.
Ophthalmologist
He is located at 340 Rancheros Drive Suites 164/166 in San Marcos, CA 92069. Can help patients with the following: Cataracts, Corneal Disease, Dry Eyes, Presbyopia, Retinal Detachment, Usher Syndrome. His National Provider Identifier (NPI) number is 1134427636. Appointment can be made via the phone number (760) 598-0400. He also has a website where you can get more information. The website can be found at https://lluh.org/services/eye-institute?rsource=llueyes.com/. He is affiliated with 3 practices and 2 hospitals.
Conditions treated
Dr. Howard Guan, being an ophthalmologist, treats the following conditions. Please be advised that this list may not be complete. For the full list of conditions treated, consult directly with Dr. Howard D. Guan.
- Astigmatism
- Binocular Dysfunction (BVD)
- Blepharitis
- Blindness
- Cataracts
- Chalazion
- Color Blindness
- Corneal Disease
- Corneal Ulcer
- Crossed Eyes
- Diabetic Retinopathy
- Double Vision
- Dry Eyes
- Esotropia
- Exotropia
- Eye Floaters
- Eye Strain
- Farsightedness
- Glaucoma
- Herpes of the Eye
- Hypertropia
- Keratitis
- Keratoconus
- LASIK
- Lazy Eye
- Macular Degeneration
- Nearsightedness
- Oculomotor Dysfunction
- Optic Neuritis
- Pink Eye
- Presbyopia
- Retinal Detachment
- Retinitis Pigmentosa (RP)
- Scleritis
- Sty
- Subconjunctival Hemorrhage
- Tunnel Vision
- Usher Syndrome
- Uveitis
Procedures Performed by Dr. Howard D. Guan
Insurances Accepted by Dr. Howard D. Guan
- Medicaid
- Medicare
Medicare Enrollment
Dr. Howard D. Guan is enrolled to bill Medicare as a Practitioner - Ophthalmology .
Bills through: Faculty Physicians And Surgeons Of Llusm
Based on Medicare's public enrollment records as of Jul 17, 2026. This reflects Medicare fee-for-service enrollment only and is not a comment on insurance accepted, quality, outcomes, or board certification.
Payments received
Drug payment
| New World Medical | $1500 |
| Alcon | $541 |
| Glaukos | $319 |
Other
| Consulting | $1500 |
| Food and Beverage | $1408 |
| Travel and Lodging | $89 |
Studies
LOMA LINDA UNIVERSITY SCHOOL OF MEDICINE
Graduated in 2010Other ways to reach out
- Website: https://lluh.org/services/eye-institute?rsource=llueyes.com/
- Facebook: https://www.facebook.com/LLUEyeInstitute/
Affiliated practices
Looking for more Ophthalmologists?
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- Address: 3553 Whipple Road Union City, 94587, CA
- Gender: Male
- Address: 342 F Street Chula Vista, 91910, CA
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- Address: 2554 Lincoln Boulevard Venice, 90291, CA
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- Address: 3747 Sunset Lane Antioch, 94509, CA
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- Address: 8616 La Tijera Boulevard Suite 404 Los Angeles, 90045, CA
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- Address: 10 Koret Way San Francisco, 94143, CA
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- Address: Suite 4 1002 South DE Anza Boulevard San Jose, 95129, CA
Questions & Answers
Does Dr. Howard Guan accept patients with Medicaid?
Yes, Dr. Howard Guan accepts patients with Medicaid.
Where can you meet with Dr. Howard Guan?
Dr. Howard Guan's office is located at 340 Rancheros Drive Suites 164/166 in San Marcos, CA 92069.
What conditions does Dr. Howard Guan treat?
Dr. Howard Guan provides treatment for Cataracts, Corneal Disease, Dry Eyes, Presbyopia, Retinal Detachment, Usher Syndrome. For the full list see this list.
Has Dr. Howard Guan affiliation with hospitals?
Dr. Howard Guan is affiliated with LOMA LINDA UNIVERSITY MEDICAL CENTER. For the full list of hospitals see this list.
Does Dr. Howard Guan have affiliation with practices?
Dr. Howard Guan is affiliated with Loma Linda University Health. For the full list of practices see this list.