Why Choose Us?


  • This is the ONLY allergy asthma doctor in Southern California offering Sublingual/Oral Immunotherapy treatment. It is like receiving an allergy shot WITHOUT the shots! Learn more about Sublingual Immunotherapy here.
  • Clinical trial referrals if you’re looking for a new treatment.
  • Experienced specialists with decades of experience.
  • Dedicated patient care.
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


Latest Videos

September 30, 2016

Sublingual Immunotherapy (SLIT) is an amazing alternative to shots and we are one of the few allergy offices offering this therapy...

Sublingual Immunotherapy (SLIT)

August 28, 2016

Dr. Betty Liu of the Allergy, Asthma, & Respiratory Care Medical Center discussed Asthma and its currently-available treatments.

What is Asthma?

August 28, 2016

Dr. Betty Liu of The Allergy, Asthma, & Respiratory Care Medical Center explains Allergic Rhinitis and its available treatments.

What is Allergic Rhinitis?

August 28, 2016

Dr. Betty Liu of the Allergy, Asthma, & Respiratory Care Medical Center explains Food Allergies and the currently-available treatments for...

What are Food Allergies?