Summary

Dr. Grant Marquart is a family medicine physician who earned his medical degree from Oregon Health & Science University School of Medicine. With five years of experience in family practice, he provides comprehensive care for patients of all ages. His approach focuses on treating the whole family, from pediatric care to adult medicine.

Dr. Marquart practices at Mercy Medical Center in Roseburg, Oregon, and maintains affiliations with Peacehealth Southwest Medical Center and Legacy Salmon Creek Medical Center. He treats conditions such as back pain during pregnancy, back pain in children and teens, and obstructive sleep apnea. His practice includes drug screening procedures, including tests for benzodiazepines, cannabinoids, and cocaine, ensuring comprehensive patient safety and care coordination.

Overview based on verified provider data

Quick Facts

  • 5 years of experience
  • 19 insurance plans accepted
  • Oregon Health & Science University School Of Medicine
  • 1 specialty
  • 3 hospital affiliations
  • 2 office locations
  • Male

Office Locations

Dr. Grant Williams Marquart has 2 locations

Mercy Medical Center

2700 Nw Stewart PkwyRoseburg, OR 97471

Dr. Grant Williams Marquart

22 S Greene StBaltimore, MD 21201

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Dr. Grant Williams MarquartHelix Virtual CareNicole Baldwin, APRN, FNP-BCDr. Kimberly Ann Shields
Family MedicineFamily MedicineFamily MedicineFamily Medicine
Accepts New Patients Accepts New Patients Accepts New Patients
4.2 
4.8 
5 Years of Experience 8 Years of Experience 24 Years of Experience
No Virtual Visit Option Virtual Visit Available Virtual Visit Available Virtual Visit Available
Speaks English Speaks English, Spanish
Roseburg , ORBoca Raton , FLOrlando , FLPortland , OR
Med School: Oregon Health & Science University School Of Medicine Med School: Univ Of North Texas Health Science Center Texas College Of Osteopathic Med
Current Profile
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Insurance Plans Accepted by Dr. Grant Williams Marquart

  • Aetna
  • ATRIO Health Plans
  • Blue Cross Blue Shield
  • CarePartners of Connecticut
  • Cigna
  • Medicaid - Medicaid
  • Medicaid - Medicaid (Managed)
  • Medicare
  • Medicare - Medicaid
  • Medicare - Medicare
  • Moda Health
  • Mutual of Omaha
  • PacificSource Health Plans
  • Providence Health Plans
  • Umpqua Health Alliance
  • Umpqua Health Alliance - HMO
  • Umpqua Health Alliance - Medicaid
  • Umpqua Health Alliance - Medicaid (Managed)
  • UnitedHealthcare

Medical Specialties

Dr. Grant Williams Marquart has the following specialty

Certifications, License, & Education

5 Years Experience

Dr. Grant Williams Marquart holds an expired medical license in the states of Oregon and Washington.

Medical License

Medical Doctor with an expired medical license in the state of Oregon that expired in 2025 and an expired medical license in the state of Washington that expired in 2025.

Education & Training

Medical School

Graduated from Oregon Health & Science University School Of Medicine in 2021.

NPI Number

Dr. Marquart's NPI number is 1730728361.

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Frequently Asked Questions

Is Dr. Grant Marquart accepting new patients?
Dr. Grant Marquart has not indicated that they accept new patients. Contact their office through their Vitals profile to check for availability.
Does Dr. Grant Marquart accept my insurance?
You can see the insurance plans that Dr. Grant Marquart accepts on their Vitals profile.
Does Dr. Grant Marquart accept virtual/telehealth appointments?
Dr. Grant Marquart has not indicated that they accept virtual/teleheatlh appointments. Contact their office through their Vitals profile to check for availability.
Where is Dr. Grant Marquart's office located?
Dr. Grant Marquart's office is located at 2700 Nw Stewart Pkwy, Roseburg, OR, 97471.
Which hospitals is Dr. Grant Marquart affiliated with?
Dr. Grant Marquart is affiliated with Mercy Medical Center, Peacehealth Southwest Medical Center, and Legacy Salmon Creek Medical Center.

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