Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Mary Catherine Trahar-Thomas, DDS

Orthodontics and Dentofacial Orthopedics Dentistry in Stevensville, MD · enumerated 2007.

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

National Provider Identifier

1740313618

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Registry record

Entity type Individual (Type 1)

Name Dr. Mary Catherine Trahar-Thomas

Credential DDS

Sex Female

Practice address 160 Sallitt Dr Ste 104, Stevensville, MD, 21666

Phone (410) 280-2484

Fax (410) 280-0416

Enumeration date Mar 13, 2007

Last updated in NPPES Dec 5, 2024

Taxonomy & licenses

1223X0400X Orthodontics and Dentofacial Orthopedics Dentistry Dental Providers · License 12153 (MD) Primary

DDS · Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees. About the DDS 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

What is the NPI number for Mary Trahar-Thomas?

The National Provider Identifier (NPI) for Mary Trahar-Thomas is 1740313618, a Type 1 (individual) record in the CMS NPPES registry.

Where does Mary Trahar-Thomas practice?

The practice location on file with NPPES is in Stevensville, MD. Providers can have multiple locations; NPPES lists the primary practice address.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-12-05.