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Gretta Gross, DO

My Locations

Map Marker A Thomas Hart Family Practice Center
1001 S. George St.
York, PA 17403
(717) 851-2521
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About Me

Why I chose to pursue a career in medicine:

I love the challenge of practicing family medicine. Each day brings something different, and I love being able to use the knowledge and skills I have to help my patients. As an osteopathic physician, I also enjoy being able to use my hands to provide comfort or healing manipulation when indicated. When I was considering career paths, I was looking for something to challenge me and keep my interest. Osteopathic family medicine provides that for me.


What I want my patients to know about me:

I am a York County native. I grew up in Manchester and graduated from Northeastern Senior High School. My family has a long tradition of farming in the county (my brothers are the 8th generation to do it). Even though I have spent parts of my career outside the area, I have always identified York County as home and am glad to have the opportunity to serve patients in this area.


What I do when I'm not seeing patients:

In addition to seeing patients, my work in medicine includes medical education. I teach medical students and residents, and I work for a national testing organization (National Board of Osteopathic Medical Examiners) to develop licensing exams. For relaxation, I enjoy spending time with my family and friends, and am a member of Christ Lutheran Church in Manchester.


Clinical Interests

  • Family Medicine
  • Osteopathic Manipulative Med.

Board Certifications

  • American Board of Family Medicine | Family Medicine
  • American Board of Osteopathic Family Physicians | Family Practice

Education & Credentials

  • Medical School: Philadelphia College of Osteopathic Medicine
  • Graduate School: Lake Erie College of Osteopathic Medicine
  • Internship Program: Warren Hospital
  • Residency Program: Warren Hospital

WellSpan Hospital Affiliations

  • WellSpan York Hospital

Health Plans Accepted

WellSpan Financial Assistance Program participant

  • Aetna
  • Aetna Better Health
  • Amerihealth Caritas PA
  • Capital Blue Cross
  • Cigna Healthsprings(Formerly Bravo)
  • Cigna/Greatwest
  • EHP Significa
  • Gateway
  • Geisinger
  • Health America
  • Highmark Blue Shield
  • InterGroup
  • John Hopkins Health Care
  • PA Medical Assistance
  • PA Medicare
  • Preferred Health Care
  • Private Healthcare Systems
  • South Central Preferred
  • Tricare
  • United Healthcare Community Plan
  • United Healthcare/ Mamsi
  • UPMC Health Plan



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