Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mary Thorsen, PT

Q: What is the NPI number for Mary Thorsen?

The National Provider Identifier (NPI) for Mary Thorsen is 1497755300, a Type 1 (individual) record in the CMS NPPES registry.

Physical Therapist in Walkersville, MD · enumerated 2005.

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

National Provider Identifier

1497755300

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Registry record

Entity type Individual (Type 1)

Name Mary Thorsen

Credential PT

Sex Female

Practice address 19 W Frederick St, Walkersville, MD, 21793

Phone (301) 845-0045

Fax (301) 845-0045

Enumeration date Jul 21, 2005

Last updated in NPPES Jul 13, 2026

Taxonomy & licenses

225100000X Physical Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 17003 (MD) Primary

PT · Physical Therapist: A licensed movement specialist treating injury and disability through exercise and rehabilitation. About the PT credential

Other identifiers

Identifier	Type	State	Issuer
322679	Other	-	MAMSI PLANS
5060511	Other	-	AETNA NON HMO
T615-0008	Other	DC	CAREFIRST BLUECHOICE
2118118	Other	-	AETNA HMO
H481DO-53189902	Other	MD	CAREFIRST BLUECROSS

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 Thorsen?

The National Provider Identifier (NPI) for Mary Thorsen is 1497755300, a Type 1 (individual) record in the CMS NPPES registry.

Where does Mary Thorsen practice?

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

Other providers at this practice address

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Virginia Wiley Family Medicine Physician · Walkersville, MD NPI 1023099033 Richard Gough Family Medicine Physician · Walkersville, MD NPI 1346223955 Lauren Heckhaus Physician Assistant · Walkersville, MD NPI 1154869378 Kayte Nusbaum Lactation Consultant (Registered Nurse) · Walkersville, MD NPI 1295506855 Privia Medical Group, LLC Family Medicine Physician · Walkersville, MD NPI 1790547883 Frederick Primary Care Associates, P.A. Family Medicine Physician · Walkersville, MD NPI 1528885191

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