Dr. Gary C. Steven

Allergy & Asthma • Wausau, WI • Since 2003 • 1 location locations

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About

Allergy, Asthma & Sinus Center S.C. is a privately owned medical practice in southeastern Wisconsin, led by board-certified allergists Dr. Gary C. Steven and Dr. Donald A. Bukstein. Founded in 2003 and based in Greenfield, WI, the center provides comprehensive allergy, asthma, and sinus care for children and adults, with services including allergy testing, nitric oxide testing, asthma education, exercise challenges, fiberoptic rhinoscopy, and scuba diving fitness evaluations. They operate at four U.S. locations, including Greenfield (HQ) and Mount Pleasant, and run daily pollen counting to improve community pollen data. The practice emphasizes patient and community support through affiliations like the American Lung Association–Wisconsin. If your search is specifically for Dr. Gary C. Steven in Wausau, note that the primary locations are in southeastern Wisconsin (Greenfield and Mount Pleasant) rather than Wausau.

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Clinic Type

Allergy & Asthma

Address

8585 W. Forest Home Ave Suite 200, Greenfield, WI 53228

Phone

+1-414-529-8500

Email

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Opening Hours

Not published — contact the clinic to confirm hours.

Website

https://myaasc.com/

Telehealth

Virtual visits offered

Services Offered

Allergy testing
Asthma care
Sinus care
Virtual visits
Office visits
Testing ordered during initial consult

Team

Dr. Gary C. Steven, Board-certified by the American Board of Allergy and Immunology (ABAI); Fellow of the ACAAI and AAAAI; Certified Physician Investigator (CPI) through ACRP — Physician

Insurance & Payment

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Languages Spoken

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FAQs

What is the ownership model of the Allergy, Asthma & Sinus Center?

Independent clinic owned by Dr. Gary Steven since February 2003 with no corporate executives or investors; care team focuses on patient care.

Photos

What Patients Say

Overall sentiment across review platforms: mixed

Unilocal: 3 reviews (various) (3)
FindATopDoc: 5/5 (3)
Yahoo Local: 2.5/5 (multiple)

Patients praise

patients who found effective, long-term solutions for chronic conditions
praise for thorough evaluations and creative, out-of-the-box treatment planning
appreciation for staff friendliness and helpfulness in certain cases
some patients value the doctor's up-to-date knowledge on latest medications

Common complaints

reports of perceived arrogance and lack of bedside manner
concerns regarding high costs and billing practices for testing and follow-ups
dissatisfaction with a perceived heavy focus on expensive prescription medications
claims of poor office administration and scheduling issues
allegations of unprofessional treatment experiences

"Very pompous. Thinks he knows more then everyone else. Wants you in his drug studies. It is his way or the highway."

— Vitals review

"Dr. Steven’s care has given me my good health back. He is a great doctor who is up on all the latest medications and treatments... willing to listen to and consider a patient’s ideas and thoughts."

— Unilocal review

"They do not care about their patients well being. They just want your money!"

— Mukwonago-WI.helpyouachieve.com review

Synthesized from public review platforms as of Jul 11, 2026 — sources: [1][2][3][4].

Information sourced from the clinic's website as of July 11, 2026. Own this clinic? Claim or correct this listing.