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MARY-ANNE OST MD LTD
NPI 1477501559
Family Medicine - Geriatric Medicine in West Grove, PA

Active since May 04, 2006CLIA 39D2111699 · Waiver
1 COMMERCE BLVD, SUITE 203, WEST GROVE, PA 19390(610) 869-0311(610) 869-0333 Get Directions Write a Review

NPPES record last updated: August 19, 2025. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Feb 20, 2020, Feb 2, 2016 (2 updates tracked since 2016).

About Mary-anne Ost Md Ltd NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MARY-ANNE OST MD LTD (NPI 1477501559) is a healthcare organization registered as a geriatric medicine in West Grove, Pennsylvania and active in the NPI registry since May 2006. The organization holds a CLIA Waiver certificate valid through April 12, 2028 and lists Mary-anne Ost, President, as its authorized official.

NPPES Registry Identity

NPI1477501559
Entity TypeOrganization
Primary Taxonomy207QG0300X
Legal Business NameMARY-ANNE OST MD LTD
Location Address1 COMMERCE BLVD, SUITE 203West Grove, PA 19390-9198
Mailing Address1 Commerce Blvd, Suite 203West Grove, PA 19390-9198 · (610) 869-0311 · Fax (610) 869-0333
Phone(610) 869-0311
Fax(610) 869-0333
Organization SubpartNo
Authorized OfficialMary-anne OstPresident · (610) 869-0311
Enumeration DateMay 4, 2006
Last NPPES UpdateAugust 19, 20252 updates tracked since enumeration
NPPES CertifiedAugust 19, 2025
✔ NPI 1477501559 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyFamily Medicine · Geriatric MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207QG0300X
Definition
A family medicine physician with special knowledge of the aging process and special skills in the diagnostic, therapeutic, preventive and rehabilitative aspects of illness in the elderly. This specialist cares for geriatric patients in the patient's home, the office, long-term care settings such as nursing homes, and the hospital.
1 COMMERCE BLVD, West Grove, PA 19390
Open in Google Maps ↗

Other Identifiers 3

Other1190896Cigna
Other4076312Aetna
Other002823997Personal Choice

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Buckeye Health Plan, Ambetter Health, Ambetter Health of Delaware.Insurance ›

CLIA Laboratory Certificates CMS CLIA

Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.

Certificate of Waiver 39D2111699

Mary - Anne Ost MD Ltd · West Grove, PA
Active · expires Apr 12, 2028
CLIA Number39D2111699
Laboratory TypePhysician Office
Certificate Effective DateApril 13, 2026
Certificate Expiration DateApril 12, 2028
Laboratory DirectorDr. Mary-Anne Ost
Laboratory Phone(610) 869-0311
Laboratory LocationMary - Anne Ost MD Ltd1 Commerce Blvd Suite 203, West Grove, PA 19390
CLIA data matches this NPI record on: Address Name Phone
This certificate is issued to a laboratory to perform only waived tests.

Other Providers at the Same Location NPPES 5

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. JOSEPH F ECKMAN JR. DM D
Dentist (General Practice)
1 COMMERCE BLVD
WEST GROVE, PA 19390
Chester County (610) 345-1125
FOOT AND ANKLE ASSOCIATES LLP
Podiatrist
1 COMMERCE BLVD, STE 102
WEST GROVE, PA 19390
Chester County (610) 345-0222
DR. ZACHARY EMERSON DMD
Dentist (General Practice)
1 COMMERCE BLVD
WEST GROVE, PA 19390
Chester County (610) 345-1125
MARY-ANNE OST M.D.
Family Medicine (Geriatric Medicine)
1 COMMERCE BLVD, SUITE 203
WEST GROVE, PA 19390
Chester County (610) 869-0311
MATTHEW FIRESTONE DDS
Dentist (General Practice)
1 COMMERCE BLVD
WEST GROVE, PA 19390
Chester County (610) 345-1125

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Mary-Anne Ost MD Ltd's NPI number?

The NPI number for Mary-Anne Ost MD Ltd is 1477501559. It was assigned to this organization in the NPPES registry on May 4, 2006.

Where is Mary-Anne Ost MD Ltd located?

Mary-Anne Ost MD Ltd is located at 1 Commerce Blvd Suite 203, West Grove, PA 19390. The listed phone number is (610) 869-0311.

What is Mary-Anne Ost MD Ltd's specialty?

The primary specialty registered for this NPI is Family Medicine, specializing in Geriatric Medicine, with taxonomy code 207QG0300X.

Does Mary-Anne Ost MD Ltd hold a CLIA laboratory certificate?

Yes. A Certificate of Waiver (number 39D2111699) is associated with this NPI, valid through April 12, 2028. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

What insurance does Mary-Anne Ost MD Ltd accept?

Health plans from Ambetter Health, Ambetter Health of Delaware and Ambetter from Buckeye Health Plan list Mary-Anne Ost MD Ltd as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Mary-Anne Ost MD Ltd was last updated on August 19, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.