Live
Read more

Clinic Type

Internal Medicine

Address

11904 Oak Creek Pkwy Huntley, IL 60142

Phone

(847) 506-1478 / (847) 884-7710

Email

careers@ascension.org

Opening Hours

Not published — contact the clinic to confirm hours.

Emergency Care

If you are experiencing a life-threatening emergency, call 911 or go directly to the ER.

Services Offered

Team

  • Fred J Halloran — MD

Insurance & Payment

Languages Spoken

Photos

What Patients Say

Overall sentiment across review platforms: positive

  • Birdeye (UW Health Belvidere Clinic): 4.8/5 (445 reviews)
  • Tebra (Eileen Solis, FNP-BC): 4.99/5 (196 reviews)
  • WebMD (Dr. Therese Lucietto-Sieradzki): 4.0/5 (48 ratings)
  • US News (Dr. Mary D. Simmons): 5/5 (28 reviews)
  • Healthgrades (Dr. Clayton Malaker): 4.2/5 (6 reviews)
  • WebMD (Dr. James Phoenix): 5/5 (11 ratings)

Patients praise

  • Caring, attentive, and professional staff
  • Physicians who listen to patient concerns and value their input
  • Efficient, clean, and modern clinic environments
  • Convenience of telehealth options and timely lab services
  • Comprehensive and knowledgeable medical care

Common complaints

  • Long wait times in office waiting rooms
  • Scheduling issues and difficulty booking appointments
  • Perceived dismissiveness or disagreements over medical advice

"Dr. Eileen and her entire staff are amazing! They really make you feel like family. They go above and beyond for their patients."

Tebra (Review for Eileen Solis, FNP-BC)

"You’ll be in her waiting room for at least an hour so don’t bother going while you’re at work."

Vitals (Review for Dr. Therese Lucietto-Sieradzki)

"Dr. Malaker was very caring. He took his time with me and actually listened to what I had to say. He never talk down to me and made me feel like he valued my opinion."

Healthgrades (Review for Dr. Clayton Malaker)

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.

More internal medicine clinics in Belvidere

Belvidere, IL·Internal Medicine

VerifiedOnline booking
Belvidere, IL·Internal Medicine

Summary: OSF HealthCare is a nonprofit integrated health system founded in 1877 and headquartered in Peoria, Illinois. It operates in multiple locations across the United States (including 21 offices in Illinois) and employs over 5,250 staff with annual revenue around $4.6 billion. OSF Medical Group provides primary care and other specialty services; it has roles and clinics listed under various care settings, including primary care, cancer institute, and other specialty programs. If you’re seeking OSF Medical Group – Primary Care in Belvidere, IL, this page confirms OSF HealthCare’s broader network and affiliated locations, but does not provide a specific Belvidere primary care clinic address. For precise Belvidere primary care availability, contact OSF HealthCare through their main site or OSF Medical Group directory to locate the Belvidere clinic or nearest OSF primary care office.

VerifiedSince 1877

See all internal medicine clinics in Belvidere

Comparing your options?

See other internal medicine clinics in Belvidere, or search the full directory by insurance, ratings, and more.

More Internal Medicine Clinics