Southwest Allergy & Asthma Center

Immunology • Allen, TX

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About

Allen Allergy & ENT Healthcare in Allen, Texas provides comprehensive diagnosis and treatment for allergies, asthma, and sinus conditions. Services include allergy testing, allergy shots, sublingual immunotherapy (allergy drops), and asthma treatment. The clinic is staffed by board-certified physicians and physician assistants specializing in adult and pediatric allergy and respiratory care.

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Clinic Type

Immunology

Address

1101 Raintree Circle, Suite 140, Allen, Texas 75013

Phone

214-884-3602

Email

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Opening Hours

| Monday | 8:30am – 1:00pm / 2:00pm – 5:00pm | | --- | --- | | Tuesday | 8:30am – 1:00pm / 2:00pm – 5:00pm | | Wednesday | 8:30am – 1:00pm / 2:00pm – 5:00pm | | Thursday | 8:30am – 1:00pm / 2:00pm – 6:00pm | | Friday | 7:30am – 2:00pm | | Saturday | Closed | | Sunday | Closed |

Website

https://swallergy.com/locations/allen/

Services Offered

Allergy Testing
Allergy Shots
Allergy Drops (Sublingual Immunotherapy)
Asthma Treatment
Sinus care
Comprehensive diagnosis and treatment for allergies, asthma and sinus conditions

Team

Gregg Santilli, M.D. — M.D.
Madiha Hussain, PA-C — PA-C

Insurance & Payment

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Languages Spoken

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FAQs

What are the office hours?

See weekly hours: Mon-Fri various times; Sat/Sun Closed.

Awards & Accreditations

Award-Winning Care with Premier Allergy Specialists

Photos

What Patients Say

Overall sentiment across review platforms: mixed

The ENT & Allergy Centers of Texas official website: 5 out of 5 (multiple testimonials listed)

Patients praise

knowledgeable and informative doctors
friendly and professional staff
fast check-in and waiting times
good with children

Common complaints

dismissal of patients after negative feedback

"Dr. Champion is great, she’s very informative and patient. She invites questions and is results driven. Her PA is also wonderful, the entire staff is very competent and moves quickly on needed appointments."

— The ENT & Allergy Centers of Texas patient review

"So my wife gave them a bad review because of Dr. Reddy's services and they sent her a letter saying they will not be providing her any medical care after..."

— Yelp review regarding Allergy & Asthma Associates of Allen

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

In the News

ENT & Allergy Associates Expands Network to Texas by Partnering with Houston ENT & Allergy — Dec 3, 2025
ENT & Allergy Associates Announces Plans to Integrate Epic Across Its Network Elevating the Patient Experience and Care Coordina — Feb 25, 2026
Parallel ENT & Allergy Expands Texas Presence, Welcomes Three Leading Practices as Supported Partners — Jan 7, 2026

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