Allergy relief
We can ease the symptoms, or change the course of the disease, for nearly any type of allergy, from the most common to the rarest.
Allergy & asthma specialists · Clackamas & Tigard
Breathe easier through every Oregon season.
Personalized care for allergies, asthma and food allergy, backed by more than 50 FDA clinical studies led right here in Portland.
- 50+FDA studies led
- 99.9%food-allergy patients desensitized
- 1 of 3Oregon clinics offering food OIT
What we treat
Allergy & asthma treatment services
Dr. Fritz and his staff offer a range of treatments for your specific needs, using cutting-edge techniques and medicines, some first studied by our own research arm, Portland Research.
Asthma treatment
25 million Americans have asthma, and 60% of cases are driven by allergies. We build a personal asthma management plan so you can live a normal, active life.
Desensitization
Food oral immunotherapy (OIT), plus drug and venom desensitization, to build lasting tolerance instead of just avoiding triggers.
How desensitization works →Conditions we treat
- Nose & eye allergies
- Seasonal allergies
- Hay fever
- Rhinitis
- Sinusitis
- Nasal polyps
- Asthma
- Bronchitis
- COPD
- Vocal cord dysfunction
- Food allergy
- Drug allergy
- Aspirin sensitivity
- Latex allergy
- Insect sting & venom allergy
- Anaphylaxis
- Hives
- Eczema
- Dermatitis
- Contact dermatitis
- Pet allergies
- Dust allergy
- Hereditary angioedema (HAE)
Freedom from reactions
Food, drug & venom desensitization
More than 200,000 Americans visit the ER each year for food allergies. Portland Allergy & Asthma is one of only three clinics in Oregon able to provide food desensitization.
Food oral immunotherapy (OIT)
Done over the long term, OIT can free patients from reactions to egg, milk, soy, peanut, tree nuts, seeds and wheat. Dr. Fritz has conducted OIT research published in The New England Journal of Medicine and wrote a book chapter on food allergy used to teach physicians worldwide. Over the past ten years he has desensitized 99.9% of his food-allergic patients.
What the OIT process looks like
- Build-up, about 2–12 months. You eat gradually larger daily amounts of the food you're allergic to.
- Regular check-ins. Clinic visits, usually every 1–2 weeks, to see how you tolerate each new dose level.
- Daily maintenance. Once you reach your target, a daily maintenance dose keeps your tolerance in place.
Drug desensitization
We can desensitize patients to aspirin, penicillin and other antibiotics in just 1 to 5 days of treatment, depending on the medication.
Venom desensitization
For dangerous reactions to honey bee, wasp, yellow jacket or hornet stings. After testing identifies the insect, desensitization makes future stings far less likely to cause a problem. It's a simple, potentially life-saving treatment covered by almost all insurance plans.
About us
A Portland native caring for Portland families
Dr. Fritz grew up in Portland and has practiced allergy and asthma medicine for more than 25 years, since beginning his fellowship in Michigan in 2001. He now welcomes patients at our Clackamas and Tigard clinics. We treat every type of allergy, and we are one of the few clinics in Oregon to provide food, venom and drug desensitization. We are also one of the largest practices on the West Coast for hereditary angioedema (HAE) patients and research studies.
Patient-centered care is the heart of our practice. We take the time to understand your needs, and our goal is simple: you should feel better walking out of our office than when you walked in.
Research that reaches your care
Dr. Fritz has been the principal investigator in over 50 FDA-approved studies and is recognized as a leader in his field. Being involved in research lets us offer new therapies that few practices can match.
- 25+ years of experience
- 50+ FDA studies as principal investigator
- 4.75★ patient rating on ZocDoc
- Published peanut OIT research in The New England Journal of Medicine
Patient stories
What our patients say
A few of our 5-star reviews on Google.
★★★★★“My daughter has been under Dr. Fritz's care for seven years, managing both her allergies and asthma. The allergy shots, coupled with the discovery that her asthma was allergy-triggered, have led to her being asthma-free for going on three years and no longer needing medications. The results are truly remarkable.”
★★★★★“He helped my son with Oral Immunotherapy for tree nuts and we are forever grateful for his help. Dr. Fritz is a good human being… kind, compassionate, and a wonderful doctor.”
★★★★★“After suffering from allergies for years I finally sought treatment at Portland Allergy and Asthma. I'm just over half way through with my shots and already notice a HUGE difference! I should have done this years ago!”
★★★★★“I’m so lucky to have found Dr Fritz! He is compassionate and really listens. … They can always fit me in when needed and it’s always appreciated.”
★★★★★“I’ve been a patient of Dr. Fritz for almost 3 years now, I highly recommend his practice. My allergies are no longer debilitating during the summertime & I can actually enjoy my life.”
★★★★★“Very short wait time, staff always friendly and great with scheduling my injections a month ahead. And Dr. Fritz is the best! Recommend highly.”
Had a great visit? Your review helps other families find care.
Before your visit
Patient forms & billing
Call the clinic of your choice to book, then download and fill out the forms below before your first appointment.
Pay your bill onlineTwo clinics
Visit us in Clackamas or Tigard
Call the office of your choice to book an appointment.
Clackamas Clinic
8740 SE Sunnybrook Blvd., Suite 300Clackamas, OR 97015
- Mon – Fri
- 8:30 am – 5:00 pm
- Lunch
- Closed 12:30 – 1:30 pm
(971) 358-5600Fax (971) 358-5601
Get directions →Tigard Clinic
Roosevelt Building9370 SW Greenburg Rd., #311
Portland, OR 97223
- Tue, Wed, Fri
- 8:30 am – 5:00 pm
- Mon, Thu
- Closed
- Lunch
- Closed 12:30 – 1:30 pm
(503) 245-8060Fax (971) 358-5801
Get directions →Text messaging
SMS terms & conditions
How Portland Allergy & Asthma uses text messages, and how to stop them at any time.
STOP Opt out
HELP Get help
START Opt back in
Program description
Portland Allergy & Asthma Patient Messages sends text messages to patients and their parents or guardians who have agreed to receive them. Messages include appointment reminders and confirmations, scheduling updates, requests to complete patient forms, billing notices, and office announcements such as closures or changes in hours.
How you opt in
You agree to receive text messages by giving us your mobile number and checking the SMS consent box on our new-patient paperwork, by telling our front-desk staff in person or by phone that you want to receive texts, or by texting START to our office number. Consent to receive text messages is not a condition of receiving care or making a purchase.
Message frequency and cost
Message frequency varies based on your appointments and account activity. Message and data rates may apply. Check with your wireless carrier for details about your plan.
How to opt out
Reply STOP to any message to stop receiving texts. You will receive one final message confirming that you have been unsubscribed, and no further texts will be sent. To start receiving messages again, reply START.
Help
Reply HELP to any message for assistance, or call our Clackamas clinic at (971) 358-5600 or our Tigard clinic at (503) 245-8060 during office hours.
Your health information
Text messages are not a secure form of communication. We limit the information we send by text and do not include test results or detailed medical information. Do not use text messages for medical emergencies. In an emergency, call 911.
Carrier disclaimer
Wireless carriers are not liable for delayed or undelivered messages.
See our Privacy Policy for how we handle your mobile number and personal information.
Your privacy
Privacy policy
Last updated October 13, 2026
Information we collect
When you contact us, book an appointment or complete patient forms, we collect information such as your name, mobile phone number, email address, mailing address and insurance details. Health information you share with us as a patient is protected under HIPAA and handled according to our Notice of Privacy Practices, available at either clinic.
How we use your information
We use your information to schedule and provide care, send appointment reminders and other messages you have agreed to receive, process billing, and respond to your questions.
Mobile information and SMS consent
No mobile information will be shared with third parties or affiliates for marketing or promotional purposes. All the above categories exclude text messaging originator opt-in data and consent; this information will not be shared with any third parties.
We may share information with service providers that help us operate, such as our text messaging platform and billing processor, only as needed to provide those services to you.
Opting out
You can stop text messages at any time by replying STOP. See our SMS terms for details.
Contact us
Questions about this policy? Call our Clackamas clinic at (971) 358-5600 or our Tigard clinic at (503) 245-8060, or write to us at 8740 SE Sunnybrook Blvd., Suite 300, Clackamas, OR 97015.