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Mark P Diehl, DO
About ProfilePoints™
15 Patient Reviews
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Office Hours

  • 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 ›

Featured Review See More Reviews

He is a wonderful and caring Dr.…

Anonymous

Summary

Provider Training

UniversityDegreeFocusGraduated
Westminster CollegeBachelors DegreeOther1998
Philadelphia College of Osteopathic MedicineDoctorateOther2002

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

Practice & Hospital Affiliations

  • Hanover Hospital
       Hanover, Pennsylvania - 17331

Photos

Provider Profile 0Provider Profile 1

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
Number of Reviews: 15
Most Recent Review: 04/24/2026
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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

Willingness to Spend Time with You
Listening Skills
Clear Explanations
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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

“VERY GOOD EXPERIENCE !!...”

VERY GOOD EXPERIENCE !!

Anonymous 09/15/2025
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Verified Patient

“Had a great experience....”

Had a great experience.

Anonymous 09/12/2025
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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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Verified Patient

“Dr. Diehl was well-informed of m...”

Dr. Diehl was well-informed of medical history and was able to speak with a high degree of certainty concerning my condition

Anonymous 09/14/2025
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Verified Patient

“Caring, friendly and knowledgeab...”

Caring, friendly and knowledgeable good experience

Anonymous 09/01/2025
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Angela Borger, CRNP, DNP, FNP-C   -   Nurse Practitioner
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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.
     

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