Browse Health
Internist, Critical Care Specialist, Geriatric Specialist (elderly care)
33 years of experience
Accepting new patients
Video profile
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).

Learn more about Dr. David Callahan:

View the full profile to get information on:

  1. Qualifications
  2. What's important to you

View full profile

Patient Reviews

Patient comments (5)

The overall average patient rating of Dr. David Callahan is Excellent. Dr. Callahan has been reviewed by 10 patients who have provided 5 comments. The rating is 4.5 out of 5 stars.

Patient Ratings
Ease of Appointment 4.2
Promptness 4.0
Courteous Staff 3.8
Accurate Diagnosis 4.0
Bedside Manner 4.2
Spends Time with Me 4.2
Follows Up After Visit 4.0

Specialties & Research

Dr. David Callahan, DO is board certified in Internal Medicine and Critical Care Medicine.

  • He has special expertise in 1 area:
  • Alzheimer's Disease

Education & Awards

Dr. Callahan graduated from Philadelphia College of Osteopathic Medicine. He has 2 awards.

Castle Connolly's Top Doctors™ (2013)
Patients' Choice Award (2015)


Dr. Callahan has 3 hospital affiliations:

  • Jennersville Regional Hospital 
  • Christiana Care Health Services 
  • Wilmington Hospital 

> > > > Dr. David Callahan, DO

Similar doctors nearby

Dr. Akhnuwkh Jones

Internal Medicine
West Grove, PA

Dr. Bonnie Callahan

Internal Medicine
9 years experience
West Grove, PA

Dr. Michael Duzy

Internal Medicine
20 years experience
West Grove, PA

Dr. Richard Plotzker

Internal Medicine
42 years experience
West Grove, PA

Dr. Deepak Santram

Internal Medicine
46 years experience
West Grove, PA

Dr. Gregory Desimone

Emergency Medicine
35 years experience
West Grove, PA
Search All Similar Doctors
Additional Information
Dr. David Callahan DO is a male Internist, has 33 years of experience and practices in Internal Medicine, Critical Care Medicine, and Geriatric Medicine.
Where does Dr. David Callahan practice?
Dr. David Callahan has 1 office location.
Dr. David Callahan practices Internal Medicine, Critical Care Medicine, and Geriatric Medicine near West Grove, PA.
See West Grove Internists, West Grove Critical Care Practitioners, and West Grove Geriatric Doctors.