Quick answers
- Which hospitals does Mary Anne Ost work at?
- Medicare's official clinician data lists Mary Anne Ost at 3 hospitals: Chester County Hospital, Hospital of University of Pennsylvania and Paoli Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mary Anne Ost see patients?
- Medicare's clinician data lists 2 practice locations, including West Grove, PA and Kennett Square, PA. Call before your visit to confirm the address.
- What is Mary Anne Ost's specialty?
- Medicare lists Family Practice as the primary specialty, and also Geriatric Medicine.
- Does Mary Anne Ost accept Medicare assignment?
- Yes. Medicare's clinician data says Mary Anne Ost 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 Mary Anne Ost offer telehealth?
- Medicare's clinician data says Mary Anne Ost offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Mary Anne Ost?
- (610) 869-0311, as listed in official Medicare / NPI Registry data.
- What is Mary Anne Ost's NPI number?
- 1740249697. 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 Anne Ost works
Medicare's Facility Affiliation Data lists Mary Anne Ost at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Chester County HospitalWest Chester, PA · Acute Care Hospital · CCN 390179
- Hospital of University of PennsylvaniaPhiladelphia, PA · Acute Care Hospital · CCN 390111
- Paoli HospitalPaoli, PA · Acute Care Hospital · CCN 390153
Practice locations
Addresses where Mary Anne Ost is enrolled with Medicare (CMS data updated 2026-10-02).
- 1 Commerce Blvd, Suite 203West Grove, PA 19390 (610) 869‑0311
- 689 Unionville Rd, Suite 2Kennett Square, PA 19348 (610) 869‑0311
Specialties
- Family Practiceprimary
- Geriatric Medicinealso
Other family doctors in West Grove
Clinicians with the same Medicare primary specialty in West Grove, PA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1981 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1740249697 |
| 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