Temporary Closure Announcement:
As we have had one employee test positive for COVID-19, out of an abundance of caution, we have closed the allergy office on Friday July 10th thru Tuesday, July 14. We will reopen on Wednesday , July 15th , with our usual office hours. The rest of our employees have tested negative and will be tested again next week before we reopen. We are in the process of deep cleaning and sanitizing the entire office and disinfecting air ducts and ventilation. We are committed to providing a safe place for our patients and will be routinely testing our staff weekly. Thank you for our patience and placing your trust in us to keep you safe!

Why Choose Us?


  • Are you tired of the same old treatments? Is your current treatment not as effective as it once was?
  • Have you heard of Sublingual/Oral Immunotherapy? It’s just like receiving asthma shots, without the shots, and YOU CAN DO IT AT HOME.
  • Are you looking for new treatments? We can connect you with clinical trials where you will receive ground breaking treatments for your condition
  • Are you looking for a clinic of experienced specialists that make patient care their number one priority?
allergy asthma doctor long beach costa mesa orange county allergist - why choose us


Very professional and makes you feel at ease at the same time. He has gotten very busy due to that, though I have improved dramatically after seeing him!

Bonnie S

Long Beach, California
I was always seen in a timely manner and I’ve seen Dr. Ratnayake and Dr. Liu. Both have been nice and seemed competent and took the time to explain things to me. Also the front desk and back medical assistants have been nice and considerate as well. When a bill came in and I realized my old insurance had been billed, I had called them to correct the problem. They said they had already seen the problem and had already been rebilled to the correct insurance. It was a simple fix that they corrected right away and I never had to hear about it again. (insurance issues happen in all medical offices). Anyways, I still go to them and will continue. I may take my son there later as well should a problem arise.
allergy asthma doctor orange county long beach costa mesa california-testimonial-nancy p

Nancy P

Long Beach, California
The doctor I saw was exceptional and wise.

Catherine N.

Costa Mesa, California
My visit was great and I look forward to seeing Dr. Kim again.


Orange County, California
I recently saw Dr.Kim for a food allergy test.  Overall, my experience was very good.  He and his staff were knowledgeable, professional and friendly.
asthma allergy doctor orange county california testimonial julie k

Julie K.

Los Angeles, California
The doctors and nurses here are very nice and efficient. When I made my appointment they were glad to work around my schedule. When I showed up a few times early to my appointments they took me in when they had a few nurses done early. Overall this is a very great Medical Center for all the allergies you need to take care of.
allergy asthma doctor orange county long beach costa mesa testimonial-demetrius

Demetrius J.

Long Beach, California
Dr. Betty Liu was so informative about the allergies. She was patient and answered all my questions. She gave me strategies on how to deal with the allergies, more information about food allergies, and how to manage the family dog without getting rid of it. Right away, my son did so much better. It’s been 6 months now, he is doing great. He is breathing and sleeping better, no more snoring.  Best decisions I made regarding my son’s allergies was to consult with Dr. Liu.

S. Y.

Huntington Beach, California