Quick answers
- Which hospitals does Ari C. Greis work at?
- Medicare's official clinician data lists Ari C. Greis at 5 hospitals: Bryn Mawr Hospital, Chester County Hospital, Jefferson Einstein Montgomery Hospital, Main Line Hospital Lankenau and Riddle Memorial Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Ari C. Greis see patients?
- Medicare's clinician data lists 6 practice locations, including Cranberry Township, PA, Cranberry Twp, PA and Chalfont, PA. Call before your visit to confirm the address.
- What is Ari C. Greis's specialty?
- Medicare lists Physical Medicine and Rehabilitation as the primary specialty.
- Does Ari C. Greis accept Medicare assignment?
- Yes. Medicare's clinician data says Ari C. Greis 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.
- Does Ari C. Greis offer telehealth?
- Medicare's clinician data says Ari C. Greis offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Ari C. Greis?
- (267) 952-8120, as listed in official Medicare / NPI Registry data.
- What is Ari C. Greis's NPI number?
- 1831209105. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Ari C. Greis works
Medicare's Facility Affiliation Data lists Ari C. Greis at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Bryn Mawr HospitalBryn Mawr, PA · Acute Care Hospital · CCN 390139
- Chester County HospitalWest Chester, PA · Acute Care Hospital · CCN 390179
- Jefferson Einstein Montgomery HospitalEast Norriton, PA · Acute Care Hospital · CCN 390329
- Main Line Hospital LankenauWynnewood, PA · Acute Care Hospital · CCN 390195
- Riddle Memorial HospitalMedia, PA · Acute Care Hospital · CCN 390222
Practice locations
Addresses where Ari C. Greis is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 6; the Medicare profile lists all.
- 2000 Westinghouse DrCranberry Township, PA 16066
- 2000 Westinghouse Dr, Suite 200Cranberry Twp, PA 16066
- 4275 County Line RdChalfont, PA 18914 (267) 952‑8120
- 4275 County Line Rd, Suite 26Chalfont, PA 18914 (267) 952‑8120
- 825 Old Lancaster RdBryn Mawr, PA 19010 (800) 321‑9999
Group practices
Medicare enrollment lists Ari C. Greis as a member of these groups (CMS data updated 2026-10-02).
- Phoenix Rehabilitation and Health Services Inc2,800 clinicians in the group
- Reconstructive Orthopaedic Associates II LLC281 clinicians in the group
- Rehabclinics SPT Inc104 clinicians in the group
Specialties
Find other Physical Medicine and Rehabilitation doctors in Pennsylvania →
Other rehabilitation doctors in Cranberry Township
Clinicians with the same Medicare primary specialty in Cranberry Township, PA — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | Philadelphia College Of Osteopathic Medicine |
| Graduation year | 2003 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1831209105 |
| 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