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

Justin L Knowles, MD

Individual provider Critical Care Medicine (Internal Medicine) Physician · NPI 1659456861

Justin L Knowles, MD is a Critical Care (Intensivists) in Danville, Pennsylvania. Graduated from University of Washington School of Medicine in 2002, 24 years ago. Practices with Grand River Hospital District, a 80-clinician group and accepts Medicare assignment. Licensed in Pennsylvania.

Years since qualifying
24
Trained at
University of Washington School of Medicine
Licensed in
PA
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

100 N Academy Ave
Danville, PA 17822-2037
Phone: (570) 271-6389
Fax: (570) 271-6021
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Critical Care Medicine (Internal Medicine) Physician (primary) Taxonomy 207RC0200X · Licence MD456998 (PA)

Record details

NPI number1659456861
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedOctober 26, 2006
Last updated in NPPESAugust 24, 2016
Mailing address100 North Academy Avenue, Danville, PA 17822-4903

Medicare enrollment

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

Medicare specialtyCRITICAL CARE (INTENSIVISTS)
Medical schoolUNIVERSITY OF WASHINGTON SCHOOL OF MEDICINE
Graduated 2002 (24 years in practice)
Group practice Grand River Hospital District — 80 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

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