Mark L. Simmons, MD
Internal Medicine
Sees patients age 18 and up
LG Health Physicians Internal Medicine
Make an appointmentCall 717-544-3191
Penn Medicine Provider

About me

  • Regional Medical Director, Primary Care, Lancaster General Health Physicians

Education and training

  • Medical School: Pennsylvania State University College of Medicine
  • Residency: Fitzsimons Army Medical Center

What my patients think about me

Average Rating

249 reviews

Comments are submitted by patients and reflect their views and opinions. The comments are not endorsed by and do not necessarily reflect the views of Penn Medicine.

February 2026
always available
February 2026
he is an excellent doctor
February 2026
knows his stuff.
February 2026
listens to your concerns

Insurance accepted

My Locations

Penn Medicine hospital privileges

  • Lancaster General Hospital: Has privileges to treat patients in the hospital.
Dr. Simmons is a Penn Medicine Lancaster General Health physician.

Qualifications and experience

Treatments and Conditions