Board-certified allergy care for children and adults in Fresno, with a second office in Merced. We work with you to understand your triggers and build a plan designed to help you manage your symptoms.
Skin and blood testing to pinpoint your triggers — integrative allergy care in Fresno and Merced for seasonal, drug, vaccine, and insect allergies.
Learn more →Trusted asthma care in Fresno and Merced — diagnosis, breathing tests, and long-term control, from inhalers to biologics.
Learn more →Sinus care in Fresno and Merced for chronic sinusitis, post-nasal drip, and pressure that won't let up — treating the cause, not just symptoms.
Learn more →Allergy shots and under-the-tongue drops designed to retrain the immune response — personalized treatment throughout the year.
Learn more →Food allergy care in California — testing, oral food challenges, and desensitization options for kids and adults.
Learn more →Gentle, kid-friendly pediatric allergy and asthma care from infancy through the teen years.
Learn more →Personalized skincare plans and treatment options designed to help manage eczema flares.
Learn more →Evaluation for hives that are frequent or long-lasting, and treatment options designed to help.
Learn more →Testing and venom immunotherapy for bee, wasp, and other sting reactions.
Learn more →Evaluation for frequent or hard-to-clear infections and a plan built with your other providers.
Learn more →Evaluation for a cough lasting 8+ weeks, from postnasal drip to reflux and asthma.
Learn more →In-office breathing tests used to help diagnose asthma and evaluate lung function.
Learn more →
Muhammad Hassan Bashir, MD, is a board-certified allergist & immunologist with more than 15 years of experience. He completed his internal medicine residency at UCSF Fresno, followed by advanced allergy & immunology training at the Medical College of Wisconsin and Stanford University. He and the team work closely with each patient — pairing evidence-based care with a plan that fits your life.
Note: These are not the only insurance providers we accept — we also work with other insurance companies not listed above. Please contact us to verify your coverage.
If any of these sound like you, we can help you find a path forward. Schedule a visit →
"The team took time to actually listen and explain what was going on. I left with a clear plan instead of more questions."
"Testing was quick and the staff were great with my son. So glad to have a specialist close to home."
"Friendly, professional, and on time. They explained my options clearly and never rushed the visit."
Highly rated by patients on Google. Reviews shown are placeholders — to be replaced with real Google reviews, with no patient-identifying details.
Our main office is in North Fresno — serving Clovis, Pinedale, Mayfair, Sunnyside, Calwa, Malaga, and Muscatel — with a second office in Merced for patients across the Central Valley.
When looking for the best allergist in Fresno, check for board certification in allergy and immunology, fellowship training, and what patients say. At Sierra Allergy Asthma and Sinus Center, our Fresno allergist is board-certified, completed fellowship training at Stanford University Medical Center, and is highly rated by patients across the Central Valley on Google.
Allergists treat a wide range of conditions, including seasonal allergies, food allergies, asthma, eczema, allergic rhinitis, and sinus issues. At Sierra Allergy Asthma and Sinus Center, our allergy and immunology specialists in Fresno and Merced offer advanced testing and personalized treatment plans to help manage symptoms effectively.
You should visit an asthma doctor in Fresno or Merced if you experience frequent coughing, wheezing, shortness of breath, or asthma attacks that don't improve with standard treatment. Our clinic provides asthma care near Fresno and Merced, CA with specialized options for both adults and pediatric asthma care.
At Sierra Allergy Asthma and Sinus Center, our board-certified allergists use a variety of diagnostic tools such as skin prick testing, blood tests, and oral food challenges. These help pinpoint allergens causing your symptoms, whether it's food allergies, seasonal allergies, or contact dermatitis in Fresno.
Yes — our sinus and allergy specialists treat chronic sinusitis, which is often linked to underlying allergies. We provide sinus care in Fresno and nasal and sinus care in Merced, with integrated allergy and immunology evaluation to help manage the cause, not just the symptoms.
Many allergists are also trained in treating asthma since it is often linked to allergies. Visiting an allergy specialist or an asthma doctor at Sierra Allergy Asthma and Sinus Center can help you manage both conditions effectively.
Schedule online or call our Fresno or Merced office — same-week appointments are available.
In person or by telehealth — testing and evaluation to understand your triggers.
Leave with a personalized care plan designed to help you manage your symptoms.
Book a visit and we'll work with you to understand your triggers and build a plan designed to help.