Summary

Dr. Mark Diehl specializes in rheumatology, bringing 28 years of experience to the diagnosis and treatment of conditions affecting joints, muscles, and the immune system. He earned his medical degree from Philadelphia College of Osteopathic Medicine and completed his residency at UPMC Pinnacle Community Osteopathic Hospital, finishing in 2005. Dr. Diehl furthered his training with a fellowship at Geisinger Medical Center, completing his specialized rheumatology education in 2008. He is fluent in both German and English.

Dr. Diehl practices at WellSpan York Hospital with locations in Gettysburg and Shippensburg, Pennsylvania. His expertise includes treating rheumatoid arthritis and managing immune system disorders. He also provides care for patients with Crohn's disease. Dr. Diehl incorporates various therapeutic approaches into patient care, including physical therapy and strength training programs. Patients have given him an average rating of 3.6 out of 5 on Vitals.

AI-generated from data on this provider profile.

Quick Facts

  • accepting new patients
  • 3.6
  • 28 years of experience
  • 28 insurance plans accepted
  • speaks German, English
  • Geisinger Medical Center
  • 13 written reviews
  • 1 specialty
  • 9 areas of expertise
  • 1 hospital affiliation
  • 2 office locations
  • Male

Patients’ Perspective

  • Spent time with me

Office Locations

Dr. Mark P Diehl has 2 locations

WellSpan Rheumatology - Gettysburg

40 V Twin DrGettysburg, PA 17325
Mon8:00 am - 5:00 pm
Tue8:00 am - 5:00 pm
Wed8:00 am - 5:00 pm
Thu8:00 am - 4:30 pm
Fri8:00 am - 4:30 pm
SatClosed
SunClosed

WellSpan Rheumatology - Shippensburg

97 Progress BlvdShippensburg, PA 17257
MonClosed
Tue8:00 am - 5:00 pm
WedClosed
Thu8:00 am - 5:00 pm
FriClosed
SatClosed
SunClosed

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Dr. Mark P Diehl, DO
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Dr. Mark P Diehl, DODr. Nasser Nasseriasl, MDDr. Alan David Roumm, MDAlexander Orlando Richard Urzua
RheumatologyInternal MedicineRheumatologyAddiction Medicine
Accepts New Patients Accepts New Patients
3.6 
4.1 
28 Years of Experience 27 Years of Experience 49 Years of Experience 67 Years of Experience
No Virtual Visit Option No Virtual Visit Option No Virtual Visit Option No Virtual Visit Option
Speaks German, English Speaks English
Gettysburg , PAOlney , MDHarrisburg , PAPEMBROKE PINES , FL
Med School: Philadelphia College of Osteopathic Medicine Med School: Ross University Med School: Sidney Kimmel Medical College At Thomas Jefferson University Med School: University Central Del Caribe School Of Medicine
Current Profile
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Insurance Plans Accepted by Dr. Mark P Diehl

  • Aetna
  • AmeriHealth
  • AmeriHealth - Medicaid (Managed)
  • AmeriHealth - Medicare (Advantage HMO)
  • AmeriHealth Caritas
  • AmeriHealth Caritas - Medicaid (Managed)
  • Blue Cross Blue Shield
  • Blue Cross Blue Shield - Federal Employees Program
  • Blue Cross Blue Shield - PPO
  • Capital Blue Cross
  • CareFirst BlueCross BlueShield
  • Cigna
  • Gateway Health
  • Gateway Health - Medicare
  • GEHA
  • HealthPartners
  • HealthPartners - Medicaid (Managed)
  • Humana
  • Johns Hopkins Employer Health Programs - Medicare (Advantage HMO)
  • Medicaid - Medicaid
  • Medicaid - Medicaid (Managed)
  • Medicare
  • Medicare - Medicare
  • Meritain Health
  • UnitedHealthcare
  • UnitedHealthcare - HMO
  • UnitedHealthcare - Medicare
  • UPMC Health Plan

Medical Specialties

Dr. Mark P Diehl has the following specialty

Specialty Expertise

Dr. Mark P Diehl has the following 9 areas of expertise

  • Gout
  • Hip Osteoarthritis
  • Lupus
  • Osteoarthritis
  • Osteoarthritis (Hand and Wrist)
  • Osteoporosis
  • Rheumatic Diseases
  • Rheumatoid Arthritis
  • Tendinitis

Certifications, License, & Education

28 Years Experience

MEDICAL LICENSE

Doctor Of Osteopathy, Pennsylvania, 2026, Active

EDUCATION & TRAINING

Fellowship

Geisinger Medical Center2008

Residency

UPMC Pinnacle Community Osteopathic Hospital2005
UPMC Pinnacle Community Osteopathic Hospital2003

Medical School

Philadelphia College of Osteopathic MedicineGraduated in 2002
Westminster CollegeGraduated in 1998

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Frequently Asked Questions

Which hospitals is Dr. Mark Diehl affiliated with?
Dr. Mark Diehl is affiliated with Wellspan York Hospital.
Where is Dr. Mark Diehl's office located?
Dr. Mark Diehl's office is located at 40 V Twin Dr, Gettysburg, PA, 17325.
How can I make an appointment with Dr. Mark Diehl?
You can find contact information for Dr. Mark Diehl here on Vitals.
Does Dr. Mark Diehl accept my insurance?
You can see the insurance plans that Dr. Mark Diehl accepts on their Vitals profile.
Is Dr. Mark Diehl accepting new patients?
Dr. Mark Diehl is accepting new patients on Vitals. View Dr. Mark Diehl's profile on Vitals to make an appointment.

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