Mark P Diehl, DO
5.0(19 reviews)
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Office Hours at WellSpan Rheumatology - Gettysburg

  • Mon:8:00am - 5:00pm
  • Tue:8:00am - 5:00pm
  • Wed:8:00am - 5:00pm
  • Thu:8:00am - 4:30pm
  • Fri:8:00am - 4:30pm

Mark P Diehl, DO
Internal Medicine Physician - Rheumatology

Biography

Why I chose to pursue a career in healthcare:As a biology major in college, I had not thought about what career to take. Having had a pediatric kidney disease, I had an interest in medicine. After tak… Read more ›

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Excelente atenci?n m?dica Dios les bendiga…

Anonymous

Summary

Provider Training

UniversityDegreeFocusGraduated
Westminster CollegeBachelors DegreeOther1998
Philadelphia College of Osteopathic MedicineDoctorateOther2002

InstitutionFocusYear
Fellowship - Geisinger Medical CenterRheumatology2008
Residency - UPMC Pinnacle Community Osteopathic HospitalInternal Medicine2005
Internship - UPMC Pinnacle Community Osteopathic HospitalRotating2003

Practice & Hospital Affiliations

  • Hanover Hospital
       Hanover, Pennsylvania - 17331

Photos

Provider Profile 0

Specialties

Languages Spoken
English, German
Medical Specialties
  • Internal Medicine Physician - Sub-Specialty: Rheumatology

Years In Practice: 17 (started in 2009)

Accepts New Patients: Yes

Payment Options

Payment Details

Reviews

Average Rating: 5.0
Number of Reviews: 19
Most Recent Review: 08/22/2026
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Office & Staff Evaluation Not rated

Ease of Getting an Appointment Not rated
Courtesy of Practice Staff Not rated
Office Appearance & Atmosphere Not rated
Handling of Billing Matters Not rated
Average Wait Time Not Rated

Provider Evaluation 5.0

Willingness to Spend Time with You 5.0
Listening Skills 5.0
Clear Explanations 5.0
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Verified Patient

“Excelente atenci?n m?dica Dios l...”

Excelente atenci?n m?dica Dios les bendiga

Anonymous 08/22/2026
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Verified Patient

“This was a visit for a second op...”

This was a visit for a second opinion with a specialist. Compared to my visit with my initial specialist, Dr. Diehl was by far what I was expecting and hoping for when I visit a specialist for my condition. He took the time to listen, take notes, and provide his expert opinion on what may be beneficial to help with my condition. He was not rushed and and allotted time for us to review and discuss the reason for my visit with him.

Anonymous 06/04/2026
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Verified Patient

“He is a wonderful and caring Dr....”

He is a wonderful and caring Dr.

Anonymous 04/24/2026
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Verified Patient

“Great doctor. Very knowledgeable...”

Great doctor. Very knowledgeable.

Anonymous 12/19/2025
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Verified Patient

“Dr. Diehl is absolutely amazing!...”

Dr. Diehl is absolutely amazing! He is thorough with all parts of the care he provides. He explained to me at my visit about advancements in the field related to my condition and about new, promising research that is coming out!

Anonymous 10/09/2025
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Verified Patient

“Na...”

Na

Anonymous 06/27/2026
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Verified Patient

“Very good...”

Very good

Anonymous 05/07/2026
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Verified Patient

“Good...”

Good

Anonymous 02/24/2026
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Verified Patient

“Dr. Diehl is great!...”

Dr. Diehl is great!

Anonymous 12/11/2025
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Verified Patient

“I went to Dr Diehl more as consu...”

I went to Dr Diehl more as consultation for an existing condition but he knew my medical history as well as my regular providers and he answered all the questions I had.

Anonymous 09/17/2025
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Procedures & Services

Procedures & Treatments Offered

    Commonly Prescribed Medications

    Mark P Diehl, DO has not yet listed the medications that he commonly prescribes.

    Accepted Insurance

    Accepted Insurance

    Mark P Diehl, DO has not yet specified the insurance plans he accepts.