Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mrs. Heather E Maddox, M.D.

Family Medicine Physician in Missoula, MT · enumerated 2005 · practices at Providence Health & Services Mt.

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

National Provider Identifier

1578558094

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Registry record

Entity type Individual (Type 1)

Name Mrs. Heather E Maddox

Credential M.D.

Sex Female

Practice address 500 W. Broadway, Missoula, MT, 59802

Phone (406) 721-5600

Fax (406) 721-3907

Enumeration date Sep 12, 2005

Last updated in NPPES Jan 11, 2016

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 0101231026 (VA) Secondary

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 11962 (MT) 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
010003105	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

How do I verify Heather Maddox's NPI record?

Cross-check NPI 1578558094 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1578558094 active?

Yes, as of the latest NPPES snapshot, NPI 1578558094 is active (record last updated 2016-01-11).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-01-11.