Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Erin Kathleen Ham, MD

Allergy Physician in Helena, MT · enumerated 2010.

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

National Provider Identifier

1154642817

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Registry record

Entity type Individual (Type 1)

Name Erin Kathleen Ham

Credential MD

Sex Female

Practice address 2550 E Broadway St, Helena, MT, 59601

Phone (406) 457-4180

Enumeration date Jun 17, 2010

Last updated in NPPES Jun 21, 2016

Taxonomy & licenses

207KA0200X Allergy Physician Allopathic & Osteopathic Physicians · License 38578 (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
38578	Other	MT	LICENSE
207K00000X	Medicaid	MT	-

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

Is NPI 1154642817 active?

Yes, as of the latest NPPES snapshot, NPI 1154642817 is active (record last updated 2016-06-21).

How do I verify Erin Ham's NPI record?

Cross-check NPI 1154642817 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-06-21.