Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Cyril J Schaefer, ARNP

Nurse Practitioner in Anaconda, MT · enumerated 2006.

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

National Provider Identifier

1659323103

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Registry record

Entity type Individual (Type 1)

Name Cyril J Schaefer

Credential ARNP

Sex Male

Practice address 401 W Pennsylvania St, Anaconda, MT, 59711

Phone (406) 563-8686

Fax (406) 563-8691

Enumeration date May 16, 2006

Last updated in NPPES Jan 8, 2014

Taxonomy & licenses

363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License RN21373 (MT) Primary

Other identifiers

Identifier	Type	State	Issuer
4305199	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 1659323103 active?

Yes, as of the latest NPPES snapshot, NPI 1659323103 is active (record last updated 2014-01-08).

How do I verify Cyril Schaefer's NPI record?

Cross-check NPI 1659323103 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 2014-01-08.