HealthCareAtlasUSA

This site republishes official CMS/Medicare Care Compare data. It is not medical advice and does not recommend any specific hospital or treatment — for medical decisions, talk to a doctor.

Doctors / PA

MARK E ARMSTRONG, MD

GENERAL SURGERY

Medical school: TEMPLE UNIVERSITY SCHOOL OF MEDICINE

Graduated: 1988

NPI: 1013981711

Practice Locations (6)

GEISINGER CLINIC

100 N ACADEMY AVE

DANVILLE, PA 178229800

5702716144

GEISINGER CLINIC

1020 THOMPSON ST

JERSEY SHORE, PA 177401729

5703981991

GEISINGER CLINIC

27 SANDY LN

LEWISTOWN, PA 170441310

7172422711

GEISINGER CLINIC

400 HIGHLAND AVE

LEWISTOWN, PA 170441167

7173639071

GEISINGER CLINIC

68 SPRING ST, SUITE 203

LOCK HAVEN, PA 177451911

8002304564

GEISINGER-HM JOINT VENTURE LLC

955 BELLEFONTE AVE

LOCK HAVEN, PA 177453033

5707487714

Source: CMS National Downloadable File, September 2026.

MARK ARMSTRONG, MD | HealthCareAtlasUSA