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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).

Patient Reviews

Patient comments (10)

The overall average patient rating of Dr. Thomas Keller is Excellent. Dr. Keller has been reviewed by 14 patients who have provided 10 comments. The rating is 3.5 out of 4 stars.

Patient Ratings
Ease of Appointment 3.2
Promptness 3.4
Courteous Staff 3.5
Accurate Diagnosis 3.7
Bedside Manner 3.8
Spends Time with Me 3.6
Follows Up After Visit 3.7

Specialties & Research

Dr. Thomas Keller, DO is board certified in Internal Medicine.

  • He has special expertise in 2 areas:
  • Hot Flashes
  • Menopause

Education & Awards

Dr. Keller graduated from West Virginia School of Osteopathic Medicine, Lewisburg. He has 3 awards.

Patients' Choice 5th Anniversary Award (2014)
Patients' Choice Award (2010 - 2014)
Compassionate Doctor Recognition (2010 - 2013)


Dr. Keller has 2 hospital affiliations:

  • Hanover Hospital, Inc 
  • Hanover General Hospital 

> > > > Dr. Thomas Keller, DO

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Additional Information
Dr. Thomas Clark Keller DO is a male Internist, has 10 years of experience and practices in Internal Medicine.
Where does Dr. Thomas C. Keller practice?
Dr. Thomas Keller has 1 office location.
Dr. Thomas Keller practices Internal Medicine near Hanover, PA.
See Hanover Internists.