Quick answers
- Which hospitals does Mary P. Howell work at?
- Medicare's official clinician data lists Mary P. Howell at 2 hospitals: WellSpan Chambersburg Hospital and WellSpan Waynesboro Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mary P. Howell see patients?
- Medicare's clinician data lists 2 practice locations, including Hagerstown, MD. Call before your visit to confirm the address.
- What is Mary P. Howell's specialty?
- Medicare lists Internal Medicine as the primary specialty, and also Rheumatology.
- Does Mary P. Howell accept Medicare assignment?
- Yes. Medicare's clinician data says Mary P. Howell 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 Mary P. Howell?
- (301) 791-6680, as listed in official Medicare / NPI Registry data.
- What is Mary P. Howell's NPI number?
- 1821058710. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Mary P. Howell works
Medicare's Facility Affiliation Data lists Mary P. Howell at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- WellSpan Chambersburg HospitalChambersburg, PA · Acute Care Hospital · CCN 390151
- WellSpan Waynesboro HospitalWaynesboro, PA · Acute Care Hospital · CCN 390138
Practice locations
Addresses where Mary P. Howell is enrolled with Medicare (CMS data updated 2026-10-02).
- 11110 Medical Campus RdHagerstown, MD 21742
- 346 Mill StHagerstown, MD 21740 (301) 791‑6680
Group practices
Medicare enrollment lists Mary P. Howell as a member of these groups (CMS data updated 2026-10-02).
- Meritus Medical Center Inc743 clinicians in the group
- Klein and Associates MD PA4 clinicians in the group
Specialties
- Internal Medicineprimary
- Rheumatologyalso
Other internal medicine doctors in Hagerstown
Clinicians with the same Medicare primary specialty in Hagerstown, MD — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | West Virginia University School Of Medicine |
| Graduation year | 1985 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1821058710 |
| 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