Summary

Dr. Mark Grenquist is a board-certified internal medicine physician who specializes in hospital medicine. He earned his medical degree from Michigan State University College of Osteopathic Medicine and has been practicing for 25 years. His extensive experience in internal medicine allows him to provide comprehensive care for adults with complex medical conditions.

Dr. Grenquist is affiliated with Trinity Health Michigan Chelsea Hospital and practices at locations in Marshall and Chelsea, Michigan. He focuses on treating patients with chronic obstructive pulmonary disease (COPD) and other chronic lung conditions, particularly those with multiple health concerns. His expertise includes performing complete blood counts, coordinating infusion treatments, and interpreting CT scans to help diagnose and monitor his patients' conditions. Patients have rated Dr. Grenquist 4.3 out of 5 stars on average.

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Quick Facts

  • 4.3
  • 25 years of experience
  • 32 insurance plans accepted
  • Michigan State University College Of Osteopathic Medicine
  • 2 written reviews
  • 2 specialties
  • 5 areas of expertise
  • 1 hospital affiliation
  • 2 office locations
  • Male

Office Locations

Dr. Mark Grenquist has 2 locations

Oaklawn Hospital

200 N Madison StMarshall, MI 49068

Chelsea Hospital

775 S Main StChelsea, MI 48118

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Dr. Mark Grenquist, DOEric HarkerDr. Ravinder Rao Polasani, MDDr. Joni Roedel Summitt, DO
Internal MedicineInternal MedicineAllergy & ImmunologyCardiovascular Disease
Accepts New Patients Accepts New Patients Accepts New Patients
4.3 
3.9 
25 Years of Experience 25 Years of Experience 42 Years of Experience 44 Years of Experience
No Virtual Visit Option Virtual Visit Available No Virtual Visit Option No Virtual Visit Option
Speaks English Speaks English, Spanish Speaks English, Spanish
Marshall , MILyons , COColdwater , MICharlotte , MI
Med School: Michigan State University College Of Osteopathic Medicine Med School: Duke University School Of Medicine Med School: Kakatiya Medical College Med School: Michigan State University College Of Osteopathic Medicine
Current Profile
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Insurance Plans Accepted by Dr. Mark Grenquist

  • AARP
  • Aetna
  • Blue Cross Blue Shield
  • Blue Cross Blue Shield - HMO
  • Blue Cross Blue Shield - Medicare
  • Blue Cross Blue Shield of Michigan
  • Blue Cross Blue Shield of Michigan - HMO
  • Cigna
  • Health Alliance
  • Humana
  • Humana - Medicare
  • Humana - Medicare (Advantage HMO)
  • McLaren Health Plan
  • McLaren Health Plan - Medicaid
  • Medicaid - Medicaid
  • Medicaid - Medicaid (Managed)
  • Medicare
  • Medicare - Medicare
  • Meridian Health Plan - Medicaid (Managed)
  • Molina Healthcare
  • Molina Healthcare - HMO
  • Molina Healthcare - Medicaid
  • Priority Health
  • Priority Health - Medicare (Advantage HMO)
  • UnitedHealthcare
  • UnitedHealthcare - HMO
  • UnitedHealthcare - Medicaid
  • UnitedHealthcare - Medicaid (Managed)
  • UnitedHealthcare - Medicare (Advantage HMO)
  • Wellcare
  • WPS Health Plan
  • WPS Health Plan - Medicare

Medical Specialties

Dr. Mark Grenquist has the following 2 specialties

Specialty Expertise

Dr. Mark Grenquist has the following 5 areas of expertise

  • Chest Pain
  • Gastrointestinal Bleeding
  • Hospital Medicine
  • Meningitis
  • Pneumonia

Certifications, License, & Education

25 Years Experience

MEDICAL LICENSE

Doctor Of Osteopathy, Michigan, 2028, Active

EDUCATION & TRAINING

Medical School

Michigan State University College Of Osteopathic MedicineGraduated in 2001

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Frequently Asked Questions

Does Dr. Mark Grenquist accept virtual/telehealth appointments?
Dr. Mark Grenquist has not indicated that they accept virtual/teleheatlh appointments. Contact their office through their Vitals profile to check for availability.
Where is Dr. Mark Grenquist's office located?
Dr. Mark Grenquist's office is located at 200 N Madison St, Marshall, MI, 49068.
Which hospitals is Dr. Mark Grenquist affiliated with?
Dr. Mark Grenquist is affiliated with Trinity Health Michigan Chelsea Hospital.
Does Dr. Mark Grenquist accept my insurance?
You can see the insurance plans that Dr. Mark Grenquist accepts on their Vitals profile.
Is Dr. Mark Grenquist accepting new patients?
Dr. Mark Grenquist has not indicated that they accept new patients. Contact their office through their Vitals profile to check for availability.

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