Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Sheena Nidiffer

Peer Specialist in Afton, OK · enumerated 2018 · practices at Grand Lake Mental Health Center, Inc..

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

National Provider Identifier

1639654429

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Registry record

Entity type Individual (Type 1)

Name Sheena Nidiffer

Sex Female

Practice address 138 S. Main St, Afton, OK, 74331

Phone (918) 257-4244

Enumeration date Sep 27, 2018

Last updated in NPPES Oct 23, 2018

Taxonomy & licenses

175T00000X Peer Specialist Other Service Providers 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.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Sheena Nidiffer practice?

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

What is the NPI number for Sheena Nidiffer?

The National Provider Identifier (NPI) for Sheena Nidiffer is 1639654429, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

Browse all →

Stacey Jameson Mental Health Counselor · Afton, OK NPI 1043441249 Zachary Kingfisher Peer Specialist · Afton, OK NPI 1831568617 Laurie Althouse Case Manager/Care Coordinator · Afton, OK NPI 1538526645 Russell Peters Family Nurse Practitioner · Afton, OK NPI 1093252439 Donna Cunningham Social Worker · Afton, OK NPI 1831617844 Jaime Siegmann Peer Specialist · Afton, OK NPI 1003397084 Grand Lake Mental Health Center, Inc. Mental Health Clinic/Center (Including Community Mental Health Center) · Afton, OK NPI 1366082208 Dakota Barnett Peer Specialist · Afton, OK NPI 1952056889

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-10-23.