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About

Summary: - University of Michigan Health-Sparrow (formerly Sparrow Health System) is a nonprofit regional health system based in Lansing, Michigan, founded in 1896. - It operates Sparrow Hospital and multiple facilities, delivering comprehensive care across rural, primary, emergency, cancer, heart, and women’s health services (including a Level 1 Trauma Center and the Mother Baby Center). - The system has rebranded to University of Michigan Health-Sparrow; some communications may use Sparrow Health System or UM Health-Sparrow during the transition. - For East Lansing primary care specifically, UM Health-Sparrow provides local primary care practices as part of its network, focusing on accessible, community-based care in Mid-Michigan. If you’re seeking East Lansing primary care locations, you’ll likely find UM Health-Sparrow primary care clinics in the East Lansing area as part of the Lansing network, under the UM Health-Sparrow branding.

Clinic Type

Primary Care

Address

2900 Hannah Blvd., Ste 104, East Lansing, MI 48823

Phone

517.364.8000

Email

info@TheMac.org

Opening Hours

Monday-Thursday 7 a.m.–5 p.m.; Friday 7:30 a.m.–4 p.m.

Emergency Care

Emergency care available (via UM Health-Sparrow emergency services)

Services Offered

  • primary care
  • outpatient department
  • family medicine

Team

  • Marissa A. Miller, DO, DO — Provider
  • Danielle E. Mugerian, DO, DO — Provider
  • Katherine E. Stanulis, NP, NP — Provider

Insurance & Payment

Languages Spoken

FAQs

What are the clinic hours?

Hours: Monday-Thursday 7 a.m. - 5 p.m.; Fridays 7:30 a.m. - 4 p.m.

Photos

What Patients Say

Overall sentiment across review platforms: mixed

  • Birdeye (Sparrow Urgent Care East Lansing): 2.4/5 (184 reviews)
  • Solv Health (Sparrow Urgent Care East Lansing): 5.0/5 (2 reviews)
  • Vitals (Dr. Marissa A. Miller): 4.2/5 (22 ratings)
  • U.S. News (UM Health-Sparrow Lansing Primary Care): 4/5 (12 reviews)

Patients praise

  • Friendly and helpful staff members
  • Clean facility environment
  • Efficient check-in and short wait times in some instances
  • Physicians described as compassionate, thorough, and effective listeners

Common complaints

  • Difficulty reaching the office via phone, leading to dropped calls or unanswered inquiries
  • Concerns regarding timely follow-up on prescriptions
  • Occasional dissatisfaction with specific physician interactions

"Dr. Miller listens well and gives options to help you be a partner for your own care. She's absolutely amazing. She's very caring and takes time to listen..."

Vitals patient review for Dr. Marissa A. Miller

"The Nurse Practitioner did not order my prescription to the drug store after my visit. I tried calling but the calls dropped. I had to return to the office to ask about the prescription."

Yelp/MapQuest review for UM Health-Sparrow facility

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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