Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Justin Daniel Hark, DO

Individual provider Emergency Medicine Physician · NPI 1649809559

Justin Daniel Hark, DO is an Emergency Medicine in Lewistown, Pennsylvania. Graduated from Philadelphia College of Osteopathic Medicine in 2020, 6 years ago. Practices with Geisinger Clinic, a 3,413-clinician group and accepts Medicare assignment. Licensed in Pennsylvania.

Years since qualifying
6
Trained at
Philadelphia College of Osteopathic Medicine
Licensed in
PA
In the registry since
2020
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

400 Highland Ave
Lewistown, PA 17044-1167
Phone: (717) 242-7180
Fax: (717) 242-7299
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Emergency Medicine Physician (primary) Taxonomy 207P00000X · Licence OS022827 (PA)

Record details

NPI number1649809559
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedApril 2, 2020
Last updated in NPPESAugust 8, 2023
Certification dateAugust 8, 2023
Mailing address4015 Crescent Ave, Lafayette Hill, PA 19444-1632

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyEMERGENCY MEDICINE
Medical schoolPHILADELPHIA COLLEGE OF OSTEOPATHIC MEDICINE
Graduated 2020 (6 years in practice)
Group practice Geisinger Clinic — 3413 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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