Skip to main content
Informational

Attention patients:

Starting Nov. 8, 2025, you will need to enroll in MyChart, your new patient portal, to contact your provider, request medications or see test results.

Health care

We provide affordable and personalized care

How can we help?

Helpful links

Financial

Accounts to help you save and pay for health care expenses

How can we help?

Helpful links

  • Resources

    Find contribution limits, savings tools, calculators and eligible expenses

  • Account support

    Find contact information and frequently asked questions

Tax season resources

Get ready for HSA tax season

If you used an HSA this year, the HSA Tax Center offers general information about contributions, eligible expenses and commonly used tax forms — all in one place.

Pharmacy

We make it easy to get medications you need, when and where you need them

How can we help?

Helpful links

  • Optum Rx

    For people with pharmacy insurance benefits through Optum Rx

  • Track orders

    Track your home delivery and specialty order

  • Pharmacy support

    Find contact information and answers to frequently asked questions

Mobile app

Optum Rx on the go

Request refills, track order status, manage billing information and much more.

Download on the App StoreGet it on Google Play
James P Mackessy, MD

James P Mackessy, MD

* Medicare and Medicare Advantage members only

Optum Provider

* Medicare and Medicare Advantage members only

Specialty

Family Medicine

Languages

English

Seeing patients at

Patient Reviews

Patient review summary

Learn about our survey

5

4

3

2

1

4.8

90 reviews

    • Reviewed on Jun 25, 2026
    • Verified Review

    I have been with him for over 30 years. Love the guy! Will miss him

    • Reviewed on Jun 24, 2026
    • Verified Review

    He is retiring so I can’t recommend him.

    • Reviewed on Jun 24, 2026
    • Verified Review

    he has been my doc for ever . very good doctor

    • Reviewed on Jun 23, 2026
    • Verified Review

    Excellence!!!!!

    • Reviewed on Jun 19, 2026
    • Verified Review

    he's good

    • Reviewed on Jun 17, 2026
    • Verified Review

    He's been my Dr for years. Very high level of trust. He communicates in a straightforward manner, with no fluff. Extremely knowledgeable and relates in real world terms.

    • Reviewed on Jun 16, 2026
    • Verified Review

    He has been my primary care physician for 35 years. He is an excellent Doctor, with great respect for his patients. My only regret is he is retiring and I know it will be hard to find another Doctor to fill his shoes for me as a patient. He was superb.

    • Reviewed on Jun 15, 2026
    • Verified Review

    Caring and knowledgeable, good followup with a referral.

    • Reviewed on Jun 15, 2026
    • Verified Review

    I felt comfortable and also that he really cared about my health.

    • Reviewed on Jun 14, 2026
    • Verified Review

    All good.

    • Reviewed on Jun 11, 2026
    • Verified Review

    He is great

    • Reviewed on Jun 9, 2026
    • Verified Review

    Caring, informative, intelligent

    • Reviewed on Jun 9, 2026
    • Verified Review

    Thoughtful and experienced.

    • Reviewed on Jun 3, 2026
    • Verified Review

    He takes time to listen and is very respectful of what I have to say.

    • Reviewed on May 27, 2026
    • Verified Review

    he is the best

    • Reviewed on May 24, 2026
    • Verified Review

    Thorough and practical.

    • Reviewed on May 23, 2026
    • Verified Review

    We’ve built a relationship over years of care. He knows me, and knows my preferences for things like prescriptions or specialty care.

    • Reviewed on May 20, 2026
    • Verified Review

    Like I said he treats you just like family. He wanted know all. Aches and pains you have.

    • Reviewed on May 20, 2026
    • Verified Review

    I came in with severe abdominal pain. Dr Mackessy said it was a UTI and prescribed a sulfate. Three days later the test results were posted as negative. However the medicine had wiped out my gut flora , leaving me with C-diff, horrible pain, nausea and diarrhea, resulting in a 16 pound weight loss and a traumatic trip to the emergency room.

    • Reviewed on May 19, 2026
    • Verified Review

    He was great! Listened to all my issue I was having with my shoulder & neck.

Page 1 of 5
  • About James P Mackessy, MD

    Dr. Mackessy is a board-certified family medicine doctor. He received his medical degree from Wright State University Boonshoft School of Medicine. He has expertise in treating hypertension and high blood pressure, bronchitis, diabetes, among other conditions.

    Gender

    Male

    Board certifications

    American Board of Family Medicine

    Employed or contracted

    Employed

    Network Name

    Optum Ohio

    NPI

    1841226727

  • Insurance Accepted

    This list is for informational purposes only and may not reflect the most current plans accepted by the provider. Optum accepts most major health insurance plans. Please contact your insurance company to confirm your coverage, eligibility, and the provider's participation in your plan.

    • Most major plans accepted
    • please call to verify.
  • Medical School

    • Wright State University School of Medicine

      Family Medicine

    Residency

    • Grant Medical Center

    Internship

    • Grant Medical Center