Allergy, asthma and pediatric care for children and adults across North Orange County and the Inland Empire. Dr. Mahesh Vyas has been licensed in California since 1981 and is board certified in both Allergy & Immunology and Pediatrics.
Trees, grasses, weeds and Santa Ana winds — we help you stay ahead of every season.
years caring for Orange County families — board certified in Allergy & Immunology and Pediatrics.
Two specialties, one practice
Children & adults
Two years of fellowship training in pediatric and adult allergy prepared Dr. Vyas to find the root causes of your symptoms, then treat them by avoiding exposure or by desensitizing you to your triggers.
Newborn to age 21
Children are not small adults. Their medical needs change as they grow, and caring for them and their parents is an art. Dr. Vyas has been a board-certified pediatrician for over four decades.
Coming soon: Aesthetic laser services.
Allergy & asthma services
Select a service to learn how we diagnose and treat it.
How we work
Being an allergist is somewhat like being a detective.Dr. Mahesh Vyas, MD
When symptoms start, how long they last, what makes them better or worse, and what runs in the family. The history holds the first clues.
Allergy testing narrows down which pollens, molds, animals, foods or other allergens are behind your reactions.
Test results only matter when they match your symptoms. We put the pieces together to identify the true root cause.
Your plan reduces exposure to triggers, controls symptoms with the right medication, and when appropriate, builds tolerance through allergy shots.
Allergies and asthma shift with seasons and age. We adjust your plan so you stay ahead of symptoms.
Southern California season guide
Typical allergen levels across Orange County and the Inland Empire by month. Choose a month to plan ahead.
Pediatrics
“Children are not small adults. They have special medical needs that change as they grow.”
From the first newborn visit to age 21, your child sees a doctor trained in both pediatrics and allergy. That matters when coughs, rashes or stomach troubles turn out to be allergy or asthma.
Our physicians
Board Certified Allergist & Pediatrician
Dr. Vyas cares for adults and children with allergies and asthma, and provides pediatric care from newborns to age 21.
Physician
Dr. Cellona practices alongside Dr. Vyas, helping families across our Anaheim Hills, Chino Hills and Anaheim offices.
Hospital affiliations listed for Dr. Vyas.
Three convenient offices
Fax (714) 974-0300
Patient resources
Common questions
Yes. Dr. Vyas completed fellowship training in both pediatric and adult allergy, so the whole family can be seen in one practice.
Colds usually clear in 7 to 10 days and often bring aches or fever. Allergy symptoms like sneezing, itchy eyes and congestion tend to last for weeks, return at the same time each year, or flare around specific triggers. An allergy evaluation can find the cause.
Allergy shots (immunotherapy) expose your body to gradually increasing doses of what you’re allergic to, so it becomes less sensitive over time. They can reduce symptoms and the need for daily medication.
We care for children from newborns to 21 years of age.
Call the office closest to you: Anaheim Hills (714) 974-0100, Chino Hills (909) 393-7966, or Anaheim (714) 778-1100.