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About

Midwest Allergy Sinus & Respiratory (MASA) is a physician-led, academically oriented subspecialty practice in Central Illinois specializing in Allergy/Immunology and Pulmonary care. With flagship in Bloomington-Normal and additional offices in Springfield, Peoria, Carlinville, and Jacksonville, IL, MASA offers multidisciplinary care for allergy, asthma (including severe asthma), immunology, COPD, sinus and related atopic/dermatologic conditions, sleep and cough issues, and related disorders. The practice provides clinical research participation, advanced biologic therapies, immunotherapy (allergy shots/drops and oral desensitization), IVIG/infusion services, and medically supervised wellness. MASA emphasizes a lifespan approach from infancy through adulthood and engages in dermatology trials and pulmonary care beyond standard allergy treatment.

Clinic Type

Allergy & Immunology

Address

Normal, IL; Springfield, IL; satellite offices in Carlinville, Jacksonville, and Peoria

Phone

309-451-7509

Email

administrativestaff@asthma2.com

Opening Hours

Not published — contact the clinic to confirm hours.

Services Offered

  • allergy testing
  • environmental allergy testing
  • food allergy testing
  • immunology
  • asthma care
  • sinusitis treatment
  • hives treatment
  • contact dermatitis treatment
  • oral food immunotherapy (SLIT)
  • office-based food immunotherapy
  • pediatric and adult care
  • allergy action plans

Team

  • Dareen D. Siri, M.D. — Physician

Insurance & Payment

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Languages Spoken

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Photos

What Patients Say

Overall sentiment across review platforms: positive

  • Facebook: 94% recommend (10 reviews)

Patients praise

  • compassionate and knowledgeable care
  • thorough consultations
  • clear explanation of complex treatments
  • professional and attentive staff
  • effective and personalized care plans

Common complaints

  • administrative billing errors
  • confusing charges
  • occasional communication gaps with insurance departments

"Customer feedback highlights the compassionate and knowledgeable approach at Midwest Allergy Sinus & Respiratory. Reviewers frequently commend Dr. Siri for her expertise, explaining complex treatments clearly and providing current, evidence-based options."

— Wheree

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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VerifiedOnline bookingSince 2005
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