Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Michael Frederick Griswold, RNFA CNS

Clinical Nurse Specialist in Rancho Mirage, CA · enumerated 2005.

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

National Provider Identifier

1639166028

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Registry record

Entity type Individual (Type 1)

Name Michael Frederick Griswold

Credential RNFA CNS

Sex Male

Practice address 72780 Country Club Dr, Suite A104, Rancho Mirage, CA, 92270

Phone (760) 837-8020

Fax (760) 834-3780

Enumeration date Sep 30, 2005

Last updated in NPPES Nov 8, 2016

Taxonomy & licenses

163W00000X Registered Nurse Nursing Service Providers · License 525368 (CA) Secondary

364S00000X Clinical Nurse Specialist Physician Assistants & Advanced Practice Nursing Providers · License 555 (CA) Primary

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.

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Frequently asked questions

How do I verify Michael Griswold's NPI record?

Cross-check NPI 1639166028 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1639166028 active?

Yes, as of the latest NPPES snapshot, NPI 1639166028 is active (record last updated 2016-11-08).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-11-08.