Best Allergists & Immunologists in Fullerton
Finding the right allergist or immunologist in Fullerton means weighing insurance coverage, distance, and bedside manner. The metro has a growing bench of allergists & immunologists — 4 allergists & immunologists are listed below.
4 allergists & immunologists in Fullerton

Charles E. Groncy, MD Inc.
4.5Charles E. Groncy, MD Inc. · Allergy Physician
301 W Bastanchury Rd(714) 680-6220
Saba Haq Above Medical PC
4.5Saba Haq Above Medical PC · Allergy & Immunology Physician
1440 N Harbor Blvd Suite 916(949) 463-0650
St Jude Hospital Yorba Linda
4.5St Jude Hospital Yorba Linda · Allergy & Immunology Physician
279 Imperial Hwy(714) 449-4800
Sahar Z Faghih, DO
4.5Sahar Z Faghih · Allergy & Immunology Physician
1401 S Brookhurst Rd Suite 106(714) 773-1001
Allergists & Immunologists in Fullerton by insurance
These providers list this insurance as accepted, but coverage should be confirmed directly with the provider before booking.
Allergists & Immunologists in nearby cities
Same specialty in cities near Fullerton — useful if your insurance network extends across the metro.
About finding an allergist or immunologist in Fullerton
Fullerton has allergists & immunologists practicing across hospital systems, group practices, and independent clinics. When choosing an allergist or immunologist in Fullerton, the three factors most patients care about are: insurance acceptance, distance from home or work, and patient reviews. Heallexa shows all three on every listing so you can compare without clicking back and forth.
Many Fullerton allergists & immunologists list major insurance plans including Blue Cross Blue Shield, Aetna, UnitedHealthcare, Cigna, Humana, and Medicare. Listings reflect what providers have indicated they accept — always confirm in-network status directly with the office before booking. Out-of-network visits can cost 3–5× more than in-network ones.
Common questions about allergists & immunologists in Fullerton
How do I find the highest-rated allergist or immunologist in Fullerton?+
Sort the list above by rating. Heallexa surfaces verified patient reviews alongside credentials so you can see whether a provider's strengths match what you actually need.
What if no Fullerton allergists & immunologists accept my insurance?+
Try the surrounding metro — insurance networks often extend across multiple cities. The nearby-cities links below open the same specialty in adjacent markets. Always confirm coverage directly with the provider.
Are walk-in visits available with Fullerton allergists & immunologists?+
Walk-ins are uncommon for most allergists & immunologists. The "available today" filter shows providers with open same-day slots.
How often is this Fullerton list updated?+
Heallexa refreshes provider data from public NPI records and license databases on a rolling basis. Listings that fall out of the active registry are removed automatically.