Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Hillary Arnold, D.O.

Family Medicine Physician in Tacoma, WA · enumerated 2005.

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

National Provider Identifier

1457340333

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Registry record

Entity type Individual (Type 1)

Name Dr. Hillary Arnold

Credential D.O.

Sex Female

Practice address Madigan Army Medical Ctr, Department of Family Medicine, Tacoma, WA, 98431

Phone (253) 968-1038

Fax (253) 968-2608

Enumeration date Oct 14, 2005

Last updated in NPPES Oct 24, 2012

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 284 (NE) 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 Hillary Arnold practice?

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

What is the NPI number for Hillary Arnold?

The National Provider Identifier (NPI) for Hillary Arnold is 1457340333, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-10-24.