Loyal Gogstad Tillotson , MD

Gastroenterology and Internal Medicine

(605) 342-3280

Rapid City Medical Center LLP
2820 Mount Rushmore Rd
Rapid City, SD 57701


Loyal G. Tillotson, a native of northeastern Ohio, received a B.A. degree in Chemistry from Ohio Northern University before earning combined M.D. and Ph.D. degrees from Harvard Medical School. His graduate and postgraduate research centered on the cellular and molecular biology of colon cancer. His postgraduate clinical training included an Internal Medicine Residency at Duke University Medical Center and Gastroenterology Fellowship at the Massachusetts General Hospital in Boston. Subsequently, he has had faculty appointments at Harvard Medical School and the University of North Carolina at Chapel Hill. Dr. Tillotson is certified as a Diplomat in both Internal Medicine and Gastroenterology by the American Board of Internal Medicine. He is a member of the American Gastroenterological Association and has presented a variety of research papers at its national meetings. In addition to these professional activities, Dr. Tillotson has been a long-standing member of the Christian Medical and Dental Association and serves on the Rapid City Christian School Board. He is married and the father of two children.

Gender: Male

Years in Practice: 36 Years

Languages Spoken: Spanish and English

Education & Training

Medical School: Harvard Medical School,Harvard Medical School

Graduation Date: in 1985

Specialties & Hospital Affiliations

Hospital Affiliations:

  • Rapid City Regional Hospital

Specialties: Gastroenterology and Internal Medicine

Health Insurance and Affiliations

  • Aetna Choice POS II
  • Aetna Signature Administrators PPO
  • Aexcel PPO
  • BCBS Blue Card PPO
  • CIGNA Open Access Plus
  • Dakota Care
  • First Health PPO
  • Humana Choice POS
  • Humana ChoiceCare Network PPO
  • Multiplan PPO
  • UHC Choice Plus POS
  • UHC Medica Choice
  • UHC Navigate HMO
  • UHC Navigate POS
  • UHC Options PPO
  • Wellmark Blue PPO

Tillotson's Office Information

Website: www.rapidcitymedicalcenter.com
Accepting New Patients: Yes
Medicare Accepted: Yes
Medicaid Accepted: Yes

Office Hours:

Mon8:00 AM-5:00 PM
Tue8:00 AM-5:00 PM
Wed8:00 AM-5:00 PM
Thu8:00 AM-5:00 PM
Fri8:00 AM-5:00 PM

Doctor Tillotson's Other Office Information

The University Physicians Internal Medicine Office
1501 N Campbell Ave
Tucson, AZ 85724
(520) 694-4000

Fax:(520) 062-6096
Accepting New Patients: No
Medicare Accepted:No
Medicaid Accepted:No

Office Hours:

Mon8:00 AM-5:00 PM
Tue8:00 AM-5:00 PM
Wed8:00 AM-5:00 PM
Thu8:00 AM-5:00 PM
Fri8:00 AM-5:00 PM