Summary

Dr. Daniel Mast is a board-certified osteopathic physician specializing in geriatric medicine and internal medicine. He earned his medical degree from Philadelphia College of Osteopathic Medicine and completed his residency training at St. Luke's Hospital. With four decades of clinical experience, Dr. Mast brings extensive knowledge to caring for adult patients across all age groups, with particular expertise in the unique healthcare needs of older adults. He provides care in English.

Dr. Mast practices at multiple locations throughout Lancaster, Pennsylvania, with affiliations at Lancaster General Hospital, Christianacare Wilmington Hospital, and Penn State Health Lancaster Medical Center. His clinical focus includes managing diabetes, particularly Type 2 diabetes in both adults and younger patients. He performs essential diagnostic procedures such as blood work and complete blood counts to monitor patient health and guide treatment decisions. Patients have given Dr. Mast an average rating of 4.4 on Vitals, reflecting their confidence in his comprehensive approach to internal medicine and geriatric care.
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Overview based on verified provider data

Quick Facts

  • accepting new patients
  • 4.4
  • 40 years of experience
  • speaks English
  • St Lukes Hospital
  • 3 written reviews
  • 2 specialties
  • 10 areas of expertise
  • 3 hospital affiliations
  • 4 office locations
  • Male

Patients’ Perspective

  • Gave an accurate diagnosis
  • Had a good bedside manner
  • Spent time with me

Office Locations

Dr. Daniel Dwight Mast has 4 locations

Lancaster General Hospital

555 N Duke StLancaster, PA 17602

Union Community Care

625 S Duke StLancaster, PA 17602
Mon7:00 am - 7:00 pm
Tue7:00 am - 7:00 pm
Wed7:00 am - 7:00 pm
Thu7:00 am - 7:00 pm
Fri7:00 am - 5:30 pm
SatClosed
SunClosed

Lancaster General Health Suburban Outpatient Pavilion

2100 Harrisburg PikeLancaster, PA 17601
Mon6:30 am - 7:00 pm
Tue6:30 am - 7:00 pm
Wed6:30 am - 7:00 pm
Thu6:30 am - 7:00 pm
Fri6:30 am - 7:00 pm
Sat7:00 am - 12:00 pm
SunClosed

Penn State Health Lancaster Medical Center

2160 State RdLancaster, PA 17601

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Dr. Daniel Dwight Mast, DO
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Dr. Daniel Dwight Mast, DODr. Stephen Paul Jacob, MDAndrew C MayfieldDr. Ian Roy Schreibman, MD
Geriatric MedicineAnesthesiologyNurse PractitionerGastroenterology
Accepts New Patients Accepts New Patients Accepts New Patients
4.4 
40 Years of Experience 41 Years of Experience 27 Years of Experience
No Virtual Visit Option No Virtual Visit Option No Virtual Visit Option No Virtual Visit Option
Speaks English Speaks English, Spanish Speaks English, Spanish Speaks English, Spanish
Lancaster , PABaltimore , MDLititz , PAHershey , PA
Med School: Philadelphia College Of Osteopathic Medicine Med School: University Of Rochester School Of Medicine & Dentistry Med School: New York University School Of Medicine
Current Profile
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Insurance Plans Accepted by Dr. Daniel Dwight Mast

Be sure to verify insurance information directly with your doctor's office, as it may undergo frequent changes.

Medical Specialties

Dr. Daniel Dwight Mast has the following 2 specialties

Specialty Expertise

Dr. Daniel Dwight Mast has the following 10 areas of expertise

  • Alzheimer's Disease
  • Cognitive Issues/Testing
  • Confusion
  • Dementia
  • EOL Care
  • Internal Medicine
  • Osteopenia
  • Osteoporosis
  • Senility
  • Urinary Incontinence

Certifications, License, & Education

40 Years Experience

Dr. Daniel Dwight Mast holds an active medical license in the state of Pennsylvania.

Medical License

Doctor Of Osteopathy with an active medical license in the state of Pennsylvania that expires in 2026.

Education & Training

Residency

Completed their residency at St Lukes Hospital.

Medical School

Graduated from Philadelphia College Of Osteopathic Medicine in 1986.

NPI Number

Dr. Mast's NPI number is 1104910140.

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Frequently Asked Questions

How can I make an appointment with Dr. Daniel Mast?
You can find contact information for Dr. Daniel Mast here on Vitals.
What languages does Dr. Daniel Mast speak?
Dr. Daniel Mast speaks English.
Does Dr. Daniel Mast accept my insurance?
You can see the insurance plans that Dr. Daniel Mast accepts on their Vitals profile.
Is Dr. Daniel Mast accepting new patients?
Dr. Daniel Mast is accepting new patients on Vitals. View Dr. Daniel Mast's profile on Vitals to make an appointment.
Where is Dr. Daniel Mast's office located?
Dr. Daniel Mast's office is located at 555 N Duke St, Lancaster, PA, 17602.

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