Quick answers
- Which hospitals does James P. Mackessy work at?
- Medicare's official clinician data lists James P. Mackessy at 4 hospitals: Grant Medical Center, Mount Carmel East & West, Ohio State University State Health System and Riverside Methodist Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does James P. Mackessy see patients?
- Medicare's clinician data lists 1 practice location in Columbus, OH. Call before your visit to confirm the address.
- What is James P. Mackessy's specialty?
- Medicare lists Family Practice as the primary specialty.
- Does James P. Mackessy accept Medicare assignment?
- Yes. Medicare's clinician data says James P. Mackessy accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for James P. Mackessy?
- (614) 986-0125, as listed in official Medicare / NPI Registry data.
- What is James P. Mackessy's NPI number?
- 1841226727. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where James P. Mackessy works
Medicare's Facility Affiliation Data lists James P. Mackessy at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Grant Medical CenterColumbus, OH · Acute Care Hospital · CCN 360017
- Mount Carmel East & WestColumbus, OH · Acute Care Hospital · CCN 360035
- Ohio State University State Health SystemColumbus, OH · Acute Care Hospital · CCN 360085
- Riverside Methodist HospitalColumbus, OH · Acute Care Hospital · CCN 360006
Practice locations
Addresses where James P. Mackessy is enrolled with Medicare (CMS data updated 2026-10-02).
- 680 Buckles Ct N, Suite 1aColumbus, OH 43230 (614) 986‑0125
Group practices
Medicare enrollment lists James P. Mackessy as a member of this group (CMS data updated 2026-10-02).
- American Health Network of Ohio, LLC54 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Columbus
Clinicians with the same Medicare primary specialty in Columbus, OH — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Wright State University Boonshoft School Of Medicine |
| Graduation year | 1989 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1841226727 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians