Browse Health
Internist, Geriatric Specialist (elderly care)
26 years of experience
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. Daniel Mast:

View the full profile to get information on:

  1. Qualifications
  2. What's important to you

View full profile

Patient Reviews

Patient comments (2)

The overall average patient rating of Dr. Daniel Mast is Good. Dr. Mast has been reviewed by 14 patients who have provided 2 comments. The rating is 4 out of 5 stars.

Patient Ratings
Ease of Appointment 4.8
Promptness 4.8
Courteous Staff 4.8
Accurate Diagnosis 4.4
Bedside Manner 4.4
Spends Time with Me 4.6
Follows Up After Visit 4.8

Specialties & Research

Dr. Daniel Mast, DO is board certified in Internal Medicine and Geriatric Medicine.

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

Education & Awards

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

Compassionate Doctor Recognition (2012, 2015)
On-Time Doctor Award (2014 - 2015)


Dr. Mast has 4 hospital affiliations:

  • Lancaster General Hospital 
  • Lancaster Regional Medical Center 


  • Spanish
  • English

> > > > Dr. Daniel Mast, DO

Similar doctors nearby

Dr. Ami Milton

Internal Medicine
21 years experience
Lancaster, PA

Dr. Phuoc Le

Internal Medicine
22 years experience
Lancaster, PA

Dr. Don Nguyen

Internal Medicine
19 years experience
Lancaster, PA

Dr. Bertram Johnson

Internal Medicine
42 years experience
Lancaster, PA

Dr. Amanda Bittner

Allergy & Immunology
16 years experience
Lancaster, PA

Dr. John Grosh

Internal Medicine
Lancaster, PA
Search All Similar Doctors
Additional Information
Dr. Daniel D Mast DO is a male Internist, has 26 years of experience and practices in Internal Medicine and Geriatric Medicine.
Where does Dr. Daniel D. Mast practice?
Dr. Daniel Mast has 1 office location.
Dr. Daniel Mast practices Internal Medicine and Geriatric Medicine near Lancaster, PA.
See Lancaster Internists and Lancaster Geriatric Doctors.