Expert Care for Allergies, Asthma, & Immunology

Welcome to Olympia Allergy and Immunology, the practice of Dr. Jon Welch, MD. We specialize in providing comprehensive testing, effective desensitization therapies, and clear treatment pathways for patients of all ages in Bellevue and the greater Seattle area.

Secure Patient Communication & Care Portal

To ensure secure, timely, and direct communication with Dr. Welch's clinical staff, all patients are required to use the Klara framework. We utilize this platform to streamline your care and protect your privacy.

  • Direct Messaging: Skip the phone lines and text our staff directly.
  • Digital Intake: Complete your required patient paperwork before your visit.
  • Online Billing: Securely view statements and take care of medical balances.

Please note: Inbound calls and voicemails are rarely processed by our front desk. For the fastest response, please launch the messenger below.

Launch Secure Klara Portal

Our Specialized Treatment Pathways

Allergy Testing & Diagnosis

Accurate identification of environmental, animal, and food triggers utilizing precise diagnostic methods including skin patch testing and oral food challenges.

Advanced Desensitization

Specialized immunotherapy and desensitization pathways designed to safely build tolerance against severe anaphylactic food allergies and insect stings.

Asthma & Complex Immunology

Targeted medical strategies for managing chronic asthma flares, atopic dermatitis (eczema), hives, and complex immunodeficiency conditions.

What Our Patients Say

Real experiences from our patients in Bellevue and the greater Seattle area.

★★★★★
“Dr. Welch is a kind soul with great bedside manners and excellent treatment protocols. He and his team at Olympia Allergy go the extra mile for their patients. Treatment cost, flexibility on appointments, and understanding are all 5/5.”
Jacob C. Google
★★★★★
“I really love this office! Dr. Welch is not only kind but also very skilled, and the nurses are always cheerful and welcoming. I feel truly lucky to have found Dr. Welch and his clinic.”
Gigi A. Google
★★★★★
“Both my daughters have severe food allergies leading to anaphylaxis. Both can now have minimal portions of nuts without severe reaction. Well worth every penny to know it won’t send them to the hospital fighting for their life.”
Cassia G. Google
★★★★★
“Dr. Welch is attentive to my concerns, answers all my questions, and knows me by name. His staff is extremely well trained, attentive, and always helpful. Dr. Welch is the best by far, more superior.”
Cynthia N. Google
★★★★★
“Dr. Jon Welch and his team offer superb, friendly, prompt, efficient, and knowledgeable medical services. Have my strongest recommendation.”
Chris S. Google
★★★★★
“Dr. Welch is caring and responsive to my needs. His staff is very nice and helpful as well. Definitely recommend!”
Huifang W. Google

Local Daily Pollen Count

Bellevue, WA

Tree Pollen

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Grass Pollen

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Clinic Location

Olympia Allergy and Immunology
2320 130th Ave NE
Building E, Suite 220
Bellevue, WA 98005

Practice Hours

  • Monday - Thursday: 8:00 AM - 6:00 PM
  • Friday: 8:00 AM - 12:00 PM
  • Saturday & Sunday: Closed

Allergy Shot Hours

Day Morning Afternoon
Mon 8:30 – 11:30 AM 1:00 – 4:30 PM
Tue 8:30 – 11:30 AM 1:00 – 4:30 PM
Wed 8:30 – 11:30 AM 1:00 – 4:30 PM
Thu 8:30 – 11:30 AM 1:00 – 4:30 PM
Fri 8:30 – 11:30 AM

No appointment needed for regular allergy shots.