NPI Portal NPI Lookup & Verification

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

John K. Grebe, PSY.D.

Clinical Psychologist in Petoskey, MI · enumerated 2007.

Data current as of Jul 11, 2026 · sourced from CMS NPPES

National Provider Identifier

1477610020

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Registry record

Entity type Individual (Type 1)
Name John K. Grebe
Credential PSY.D.
Sex Male
Practice address Petoskey, MI, 49770
Phone (231) 347-5034
Fax (231) 347-5194
Enumeration date Jan 2, 2007
Last updated in NPPES Nov 14, 2016

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

Taxonomy & licenses

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License 6301007160 (MI) Primary
PSYD — Doctor of Psychology: A clinical doctorate in psychology focused on professional practice. About the PSYD credential

Other identifiers

Identifier Type State Issuer
680B410940 Other MI BLUE CROSS

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

What specialty is John Grebe?
John Grebe is registered in NPPES with the primary taxonomy of Clinical Psychologist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

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Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2016-11-14.