NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Mary Theresa Greybush, DO

Obstetrics & Gynecology Physician in Philadelphia, PA · enumerated 2005 · practices at Abington Memorial Hospital.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1942206495

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Dr. Mary Theresa Greybush
Credential DO
Sex Female
Practice address 7996 Oxford Ave, Philadelphia, PA, 19111
Phone (215) 728-1411
Fax (215) 745-7578
Enumeration date Jun 21, 2005
Last updated in NPPES Apr 19, 2018

Taxonomy & licenses

207V00000X Obstetrics & Gynecology Physician Allopathic & Osteopathic Physicians · License OS009279L (PA) Primary
DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO credential

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Mary Greybush practice?
The practice location on file with NPPES is in Philadelphia, PA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Mary Greybush?
The National Provider Identifier (NPI) for Mary Greybush is 1942206495, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-04-19.