Active NPI
Mary-Anne Ost, M.D.
- Geriatric Medicine (Family Medicine) Physician
- West Grove, PA
National Provider Identifier
1740249697
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Geriatric Medicine (Family Medicine) Physician
- License
- MD039487L
- Practice address
- 1 Commerce Blvd
Suite 203
West Grove, PA 19390-9198 - Phone
- (610) 869-0311
- Fax
- (610) 869-0333
- NPI assigned
- Mar 20, 2006
- Sex
- Female
- Sole proprietor
- Yes
NPPES NPI Registry
Registry information is reported by the provider to CMS and is not verified. About this source
Specialties & licenses 1
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Geriatric Medicine (Family Medicine) Physician | 207QG0300X | MD039487L | PA | Primary |
Addresses
Primary practice location
1 Commerce Blvd
Suite 203
West Grove, PA 19390-9198
Mailing address
1 Commerce Blvd
Suite 203
West Grove, PA 19390-9198
Phone (610) 869-0311
Other identifiers 1
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 002823997 | Other | KEYSTONE/ PERSONAL CHOICE |
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Enrolled in PA
- Eligible to order & refer
- Part B services: Yes
- Medical equipment: Yes
- Home health: Yes
- Power mobility devices: Yes
- Hospice: Yes
Enrollment records 1
Care Compare profile
Medicare Care Compare- Specialty
- Family Practice
- Education
- Other, 1981
- Medicare assignment
- Accepts the Medicare-approved amount as payment in full
- Telehealth
- Offers telehealth services
Practice addresses (Care Compare)
1 Commerce Blvd
Suite 203
West Grove, PA 19390-9198
Phone (610) 869-0311
Hospital & facility affiliations
- Penn Medicine Home Health
- Bayada Home Health Care, Inc.
- Willow Tree Hospice
- Chester County Hospital
- Hospital of Univ of Pennsylvania
- Paoli Hospital
- Preston Residence
Procedures performed for Medicare patients
| Procedure | Number of procedures |
|---|---|
| Melanoma (skin cancer) excision | 1-10 |
| Removal of skin lesions | 1-10 |
| Removal or shaving of skin growth | 1-10 |
| Skin biopsy | 1-10 |
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Enrolled
- Credentials
- Doctor of Medicine
Practice roles
| Organization | Specialty | Status | New patients |
|---|---|---|---|
| Mary-Anne Ost MD LTD | Geriatric Medicine | Current | Accepting new patients |
| Joshua N Aaron MD PA | Past | Accepting new patients |
Locations
689 Unionville Rd
Ste 2
Kennett Square, PA 19348
Phone (610) 869-0311
1011 W Baltimore Pike
Ste 7
West Grove, PA 19390
Phone (610) 869-0953
1 Commerce Blvd
Ste 203
West Grove, PA 19390
Phone (410) 939-2515
Interoperability endpoints
- mary-anne.ost.1@11172.direct.athenahealth.com
Organizations & group practices 2
Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships and National Provider Directory roles.
-
- Geriatric Medicine (Family Medicine) Physician
- West Grove, PA
- NPI 1477501559
-
- Pulmonary Disease Physician
- Elkton, MD
- NPI 1346306883
Hospital & facility affiliations 8
Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.
-
- Home Health Agency
- Exton, PA
- NPI 1356626824
-
- General Acute Care Hospital
- West Chester, PA
- NPI 1356333579
-
- General Acute Care Hospital
- Paoli, PA
- NPI 1215042114
-
- Home Health Agency
- Bala Cynwyd, PA
- NPI 1992746366
-
- General Acute Care Hospital
- Philadelphia, PA
- NPI 1851370910
-
- Community Based Hospice Care Agency
- Kennett Square, PA
- NPI 1780053611
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1142812800000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1770854400000",
"number": "1740249697",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "1 COMMERCE BLVD",
"address_2": "SUITE 203",
"city": "WEST GROVE",
"state": "PA",
"postal_code": "193909198",
"telephone_number": "610-869-0311",
"fax_number": "610-869-0333"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "1 COMMERCE BLVD",
"address_2": "SUITE 203",
"city": "WEST GROVE",
"state": "PA",
"postal_code": "193909198",
"telephone_number": "610-869-0311",
"fax_number": "610-869-0333"
}
],
"practiceLocations": [],
"basic": {
"last_name": "OST",
"first_name": "MARY-ANNE",
"credential": "M.D.",
"sole_proprietor": "YES",
"sex": "F",
"enumeration_date": "2006-03-20",
"last_updated": "2026-02-12",
"status": "A"
},
"taxonomies": [
{
"code": "207QG0300X",
"taxonomy_group": "",
"desc": "Family Medicine, Geriatric Medicine",
"state": "PA",
"license": "MD039487L",
"primary": true
}
],
"identifiers": [
{
"code": "01",
"desc": "Other (non-Medicare)",
"issuer": "KEYSTONE/ PERSONAL CHOICE",
"identifier": "002823997",
"state": null
}
],
"endpoints": [],
"other_names": []
}Other providers in West Grove, PA
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Feb 12, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
- Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
- Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.