> > > > Dr. Glenn Preston, MD, PHD
Dr. Glenn Geoffrey Preston MD and PHD is a male Internist, has 15 years of experience and practices in Internal Medicine, Medical Oncology, and Hematology.
Dr. Glenn Preston has 2 office locations.
Spencer Hospital
1200 1st Ave E
Spencer, IA 51301

Phone Number
Locations and availability (2)
License & Identifications

A medical license is required for a doctor to practice medicine in a particular state. Requirements vary by state but most require, at a minimum, post-graduate training in the doctor’s specific specialty. An NPI number is a national identifier unique to an individual health care provider and is managed by the Center for Medicare & Medicaid Services (CMS).

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Specialties & Research

Dr. Glenn Preston, MD, PHD is board certified in Hematology and Medical Oncology.

Education & Awards

Dr. Preston graduated from University of Missouri at Columbia.


Dr. Preston has 10 hospital affiliations:

  • Sid Peterson Memorial Hospital 
  • Seton Medical Center 

Accepted Insurance Plans

Dr. Preston accepts these health insurances in at least one office:

  • Aetna - 1 plan
  • United Healthcare - 15 plans
  • Blue Cross Blue Shield of Texas - 4 plans
  • Superior Health Plan - 5 plans
  • Scott and White Health Plan - 6 plans
  • Humana - 12 plans
  • Cigna - 7 plans
  • USA H & W Network - 1 plan


  • Spanish

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Additional Information
Where does Dr. Glenn G. Preston practice?
Dr. Glenn Preston practices Internal Medicine, Medical Oncology, and Hematology near Spencer, IA.
Additional practice locations include: Marble Falls, TX.
See Spencer Internists, Spencer Oncologists, and Spencer Hematologists.