Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Catherine L Mathieu, M.D.

Clinical Pathology/Laboratory Medicine Physician in Winchester, VA · enumerated 2005.

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

National Provider Identifier

1447249057

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Registry record

Entity type Individual (Type 1)

Name Catherine L Mathieu

Credential M.D.

Sex Female

Practice address 1840 Amherst St, Winchester, VA, 22601

Phone (540) 536-8790

Enumeration date Oct 17, 2005

Last updated in NPPES Sep 11, 2025

Taxonomy & licenses

207ZB0001X Blood Banking & Transfusion Medicine Physician Allopathic & Osteopathic Physicians · License 0101057138 (VA) Secondary

207ZC0500X Cytopathology Physician Allopathic & Osteopathic Physicians · License 0101057138 (VA) Secondary

207ZH0000X Hematology (Pathology) Physician Allopathic & Osteopathic Physicians · License 0101057138 (VA) Secondary

207ZP0102X Anatomic Pathology & Clinical Pathology Physician Allopathic & Osteopathic Physicians · License 0101057138 (VA) Secondary

207ZP0104X Chemical Pathology Physician Allopathic & Osteopathic Physicians · License 0101057138 (VA) Secondary

207ZP0105X Clinical Pathology/Laboratory Medicine Physician Allopathic & Osteopathic Physicians · License 0101057138 (VA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
6606997	Medicaid	VA	-

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 Catherine Mathieu practice?

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

What is the NPI number for Catherine Mathieu?

The National Provider Identifier (NPI) for Catherine Mathieu is 1447249057, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Geoffrey Martin Emergency Medicine Physician · Winchester, VA NPI 1962406470 Bridget Norris Certified Registered Nurse Anesthetist · Winchester, VA NPI 1376548255 Scott King Emergency Medicine Physician · Winchester, VA NPI 1194727016 Deborah Natale Sports Medicine (Emergency Medicine) Physician · Winchester, VA NPI 1659363059 T. Bouder Critical Care Medicine (Internal Medicine) Physician · Winchester, VA NPI 1043203318 Gregory Stanford Surgery Physician · Winchester, VA NPI 1922092964 Winchester Radiologists PC Diagnostic Radiology Physician · Winchester, VA NPI 1235123977 Preston Fox Vascular & Interventional Radiology Physician · Winchester, VA NPI 1467446922

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-09-11.