Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mary Kathleen Hidalgo, CRNA

Q: What is the NPI number for Mary Hidalgo?

The National Provider Identifier (NPI) for Mary Hidalgo is 1821199159, a Type 1 (individual) record in the CMS NPPES registry.

Certified Registered Nurse Anesthetist in Fairfax, VA · enumerated 2006.

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

National Provider Identifier

1821199159

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Registry record

Entity type Individual (Type 1)

Name Mary Kathleen Hidalgo

Credential CRNA

Sex Female

Practice address 3998 Fair Ridge Dr, Suite 320, Fairfax, VA, 22033

Phone (703) 295-9360

Fax (703) 295-9369

Enumeration date Sep 26, 2006

Last updated in NPPES Sep 23, 2008

Taxonomy & licenses

367500000X Certified Registered Nurse Anesthetist Physician Assistants & Advanced Practice Nursing Providers · License 1-101930 (AL) Secondary

367500000X Certified Registered Nurse Anesthetist Physician Assistants & Advanced Practice Nursing Providers · License 0024167953 (VA) Primary

367500000X Certified Registered Nurse Anesthetist Physician Assistants & Advanced Practice Nursing Providers · License 178681 (CO) Secondary

CRNA · Certified Registered Nurse Anesthetist: An advanced practice nurse specializing in anesthesia care. About the CRNA 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 Hidalgo practice?

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

What is the NPI number for Mary Hidalgo?

The National Provider Identifier (NPI) for Mary Hidalgo is 1821199159, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Ziad Yafi Pain Medicine (Anesthesiology) Physician · Fairfax, VA NPI 1326049396 Tami Miller Certified Registered Nurse Anesthetist · Fairfax, VA NPI 1689675696 Frank Mathieu Anesthesiology Physician · Fairfax, VA NPI 1568464121 James Almirante Pain Medicine (Anesthesiology) Physician · Fairfax, VA NPI 1477514438 Kathleen Curtis Family Medicine Physician · Fairfax, VA NPI 1851331110 Michele Romano Family Medicine Physician · Fairfax, VA NPI 1548200397 Family Care of Fairfax Family Medicine Physician · Fairfax, VA NPI 1831123918 James Withers Periodontics · Fairfax, VA NPI 1336159334

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-09-23.