Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Gerald Henry Siemens, MD

Anesthesiology Physician in Missoula, MT · enumerated 2012.

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

National Provider Identifier

1447505045

Verified

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Registry record

Entity type Individual (Type 1)

Name Gerald Henry Siemens

Credential MD

Sex Male

Practice address Missoula, MT, 59803

Phone (406) 251-6733

Fax (406) 251-6733

Enumeration date Jul 19, 2012

Last updated in NPPES Jul 19, 2012

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207L00000X Anesthesiology Physician Allopathic & Osteopathic Physicians · License 4702 (MT) Primary

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

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

What is the NPI number for Gerald Siemens?

The National Provider Identifier (NPI) for Gerald Siemens is 1447505045, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-07-19.