Dr. Yen Hsia, MD, Ophthalmologist

Dr. Yen Hsia, MD

Ophthalmologist

350 N. Wiget Lane
Suite 200
Walnut Creek, CA 94598

Overall rating

Top reviews

She gives a thorough and effective eye exam and has the ability to use the results effectively when prescribing new lenses. She was able to increase strength of prism as needed and remove astigmatism prescription when no longer nShow moreeeded. I look forward to soon receiving my new glasses. She answers questions when asked, is kind and caring when doing the exam, and I am grateful for having had the opportunity to be under her vision care.

Paula Jean J. • May 20, 2026

Dr. Hsia is the fourth doctor in 6 years that I have seen for Glaucoma and by far the best. Each doctor has progressively been better than the last, and I have finally found the best for my eye health. I take comfort that I am getShow moreting the best care with controlling my eye pressure and confident with my long term outlook. I highly recommend him!

Karen E R. • June 02, 2026

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About Dr. Yen Hsia, MD

Yen Cheng (Joey) Hsia, MD, is an experienced provider at Diablo Eye Associates in Walnut Creek, California. He is a native of the Bay Area and completed his medical school at the Case Western Reserve University, where he was inducted into the Alpha Omega Alpha Honor. He completed his residency at the University of California, San Francisco, and was awarded the prestigious Heed’s fellowship. He completed an additional glaucoma fellowship at the University of California, San Francisco. 

After his training, Dr. Hsia served as the assistant professor of ophthalmology at UCSF and the medical director of the UCSF Berkeley outpatient center. He is excited to be part of Diablo Eye Associates and be able to serve the patients in the East Bay and beyond. Dr. Hsia is board certified by the American Board of Ophthalmology and is an active member of the American Glaucoma Society, the American Society of Cataract and Refractive Surgery, and the American Academy of Ophthalmology.

Dr. Hsia specializes in cataract and glaucoma surgeries. His expertise encompasses complex cataract surgeries, intraocular lens-related complications, including lens exchange and secondary intraocular lens, traditional and novel glaucoma surgeries, minimally invasive glaucoma surgeries, and complex anterior segment surgeries and reconstruction. He was the first surgeon at UCSF to perform numerous novel glaucoma surgeries and artificial iris implantation. Dr. Hsia has published numerous research manuscripts and book chapters for a glaucoma textbook. He is a frequently invited lecturer for regional and national meetings.

In his free time, Dr. Hsia enjoys cooking, snorkeling, scuba diving, and spending time with his family.


Services, Conditions and Procedures

Cataract Surgery

Cataracts

Glaucoma

Comprehensive Ophthalmology

Eye Exam

Dry Eyes

Floaters

Microinvasive Glaucoma Surgery

Emergency Eye Care

Red Eye

Contact Lens

Macular Degeneration

Lens Implant

Diabetic Eye Exam

Eye Pressure

Eye Surgery


Location

Diablo Eye Associates

350 N. Wiget Lane
Suite 200
Walnut Creek, CA, 94598


More About Dr. Yen Hsia, MD

Practice

Diablo Eye Associates

Specialties

Insurance

  • AARP
  • Aetna
  • Affinity (Medicaid)
  • Anthem
  • Blue Cross Blue Shield
  • Blue Shield California
  • Cigna
  • GEHA
  • Humana
  • Medicare
  • TRICARE
  • TriWest
  • View all

NPI Number

1326468661

Provider's Gender

Male


Reviews

4.89
972 Reviews

Very professional and caring doctor Recommended highly

Balbir S P. • July 01, 2026

Very good, like him a lot . Explains well . Takes care of me as his family.

Pattiyal M L. • June 20, 2026

Very friendly, explains the question & answers very clearly, takes time with his patients. Very accommodating. You can count on to take care of you as a patient.

Pattiyal M L. • June 20, 2026

The staff is always smiling and friendly. Dr Hsia treats me like family and patiently listens to my concerns and answers them in a way I can understand.

Carol A P. • June 19, 2026

Staff and doctor were all very nice and efficient, made the whole process very easy.

Dean W. • June 18, 2026

I have always had good experiences when I go to the eye doctors.

Kenneth A N. • June 16, 2026

Dr. Lomelino, is absolutely the best and I have always appreciated her professionalism, knowledge and recommendations. Her compassionate personality, thorough exam and diagnostics, reassures me, I have truly received the best care. Dr. Lomelino and Dr. Gilbert, are without question, the reason I continue to receive my treatment, at Diablo Eye Associates.

William A L. • June 13, 2026

Dr. Lomelino is a professional who shows care for her patients and explains each step as she is examining. I will certainly miss her. Best of luck Dr. Michele Lomelino

Antonia M A. • June 13, 2026

Wonderful ophthalmologist! Just the best.

Kristina K. • June 12, 2026

Dr. Hsia is an awesome, caring professional. It's hard to find such a professional now a days. I think I'm really blessed to have Dr. Hsia as my ophthalmologist. Thank you, Dr. Hsia.

Chul L. • June 11, 2026

What a fabulous, down-to-earth, helpful doctor! I actually enjoy going to the eye doctor because I know Dr. Lomolino will help me without judgement and in a friendly and kind manner.

Carlyn O. • June 06, 2026

Wonderful Dr.

Simi M Z. • June 06, 2026

On time (actually about 5 minutes early). The technician was efficient, friendly and explained each procedure. Th n into a second room for Dr Hsai who was his great with his explanations of each result and zing I was out of there until next year

Frank H. • June 05, 2026

Dr Hsia the best doctor who treats me from glaucoma He’s patient and curious about my medication

Sue S. • June 05, 2026

I have always received great service and treatment by Dr. Hsia and his staff. They got me in for an appointment with short notice when I had an issue with my eye.

Rodney L. • June 04, 2026

He’s the best doctor in the whole bay area

Sue S. • June 04, 2026

I was very nervous about my cataract surgery and everything went just beautifully. I would recommend this doctor to whoever is thinking of having cataract surgery. He was very professional, very easy-going and answered all the questions that I had.

Sandy Q. • June 03, 2026

Dr. Hsia is the fourth doctor in 6 years that I have seen for Glaucoma and by far the best. Each doctor has progressively been better than the last, and I have finally found the best for my eye health. I take comfort that I am getting the best care with controlling my eye pressure and confident with my long term outlook. I highly recommend him!

Karen E R. • June 02, 2026

She actively interacts with patients and is friendly and efficient.

Arlene S. • June 01, 2026

Professional. Answered my many questions. Didn’t seem rushed. I knew I was in good hands. I will definitely come back.

Sandra Miller R. • May 30, 2026

The Dr. Is very professional and a fantastic surgeon. I always feel confident that I'm going to get the best care.

Mark H. • May 29, 2026

Great listener. Cheerful and positive too. Explains patiently and effectively.

Gary L T. • May 27, 2026

Dr. Lomelino has been taking care of me along with Dr. Gilbert for many years. I trust Dr. Lomelino’s care and professionalism. What a pleasure to have a provider like her in my corner.

Karen M. • May 23, 2026

Very thorough and knowledgeable on all things that concerned my eyes.

Anthony C. • May 23, 2026

I got the feeling today that this practice did not respect my time. We arrived early for our appointment and then didn't get called for about 10 minutes after the scheduled start of the appointment. The technician conducted the basic exam including shooting the pictures of the inside of my eyes, etc. Then she dilated my eyes, took me to a waiting area, told me it would be about 10 minutes. About 55 minutes later we got called, only to be put on hold for another delay. Finally we did get to see the doctor, and that contact took about three minutes. Total elapsed time for this appointment was 90 minutes... about 80 minutes of which was spent waiting in various waiting rooms and waiting areas. Not acceptable in my mind! Disrespected my time. I understand having to wait my turn, but why have appointments if that appointment time means nothing and you just end up waiting and waiting and waiting for the process to move along.

Lawrence W. • May 21, 2026

She gives a thorough and effective eye exam and has the ability to use the results effectively when prescribing new lenses. She was able to increase strength of prism as needed and remove astigmatism prescription when no longer needed. I look forward to soon receiving my new glasses. She answers questions when asked, is kind and caring when doing the exam, and I am grateful for having had the opportunity to be under her vision care.

Paula Jean J. • May 20, 2026

Improved my prescription I will know more after the new glasses have been received and I put them to the test. Her eye exam was very thorough anIm

Paula Jean J. • May 20, 2026

I really like Dr Lonelino she explains what she's doing & listens to my concerns. The only issue I have with the doctors office is the automated appointment reminder before my appointment, I got a live person called me plus numerous texts, which I confirmed with and still got another text afterward

Penny B. • May 19, 2026

The Doc is great My appointment was 11:10 I didn't see him until 12:30. That is really poor service.

Victor K C. • May 19, 2026

Excellent professional care

Robert E. • May 16, 2026

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