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Southwest Allergy & Asthma Center

Immunology • Allen, TX

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.

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 |

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].

Information sourced from the clinic's website as of July 11, 2026.

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