Ladera Ranch Office

777 Corporate Drive, Suite 250
Ladera Ranch, CA 92694
(949) 388-1798 phone
(949) 388-6495 fax
*This Office Provides After Hours Care

Providing care in our Ladera Ranch office:

Eric Ball, MD
Kenson Lo, MD, MPH
John Mersch III, MD
Katherine Williamson, MD
Melody Mitchel, MSN, CPNP, CNS
Anneke Sager, MSN, CPNP

OFFICE HOURS

Monday through Friday
8 a.m. to 11:30 a.m.
12:45 p.m. to 4:30 p.m.

After-hours care is available in our Ladera Ranch office Monday through Thursday and on Saturdays. Please visit our After-Hours Care page for more details.

WELL EXAMS & FOLLOW-UP APPOINTMENTS

(949) 770-4242

SAME-DAY SICK VISITS

When scheduling an appointment for a same-day sick visit, please contact your office of choice:

Ladera Ranch
(949) 388-1798

Lake Forest
(949) 770-0513

Rancho Santa Margarita
(949) 858-1100

San Clemente
(949) 429-7700

If I could give 7 stars, I would! Every doctor is wonderful, Lisa, the nurse practitioner is fantastic as well as the girls up front! Both our kids have gone here since birth and we are beyond pleased! My kids had some complex medical issues and had been misdiagnosed. The doctors here diagnosed correctly and after short treatment and food changes, we have very healthy kids!

Danielle V., Anaheim, CA

Love taking my son to Dr. CHU. He has seen my son since he was born, I can’t say enough good things about him. He is really smart, he listens to everything and anything you want to address and he is very thorough. I would also like to mention all of the nurses and nurse practitioners are really good. The facility is always very clean. Another thing- they have really helped me squeeze my son in for an emergency appointment….5 stars!!!

Lydia M., Irvine, CA

Both of my children go here and I couldn’t be happier with them! From the great office staff that makes every visit simple and fast to the incredible nurses that always make my children ages 5 months and 4 yrs feel like family,

Marcus G., Anaheim, CA