Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Joseph Grayson Grau, MD

Q: What is the NPI number for Joseph Grau?

The National Provider Identifier (NPI) for Joseph Grau is 1508868456, a Type 1 (individual) record in the CMS NPPES registry.

Psychiatry Physician in Bowling Green, KY · enumerated 2005.

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

National Provider Identifier

1508868456

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Registry record

Entity type Individual (Type 1)

Name Joseph Grayson Grau

Credential MD

Sex Male

Practice address 350 Park St, Suite 204, Bowling Green, KY, 42101

Phone (270) 843-5103

Fax (270) 843-5104

Enumeration date Aug 11, 2005

Last updated in NPPES Jan 2, 2013

Taxonomy & licenses

2084P0800X Psychiatry Physician Allopathic & Osteopathic Physicians · License 37508 (KY) Secondary

2084P0800X Psychiatry Physician Allopathic & Osteopathic Physicians · License 3705 (KY) Primary

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

Other identifiers

Identifier	Type	State	Issuer
64052517	Medicaid	KY	-

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

What is the NPI number for Joseph Grau?

The National Provider Identifier (NPI) for Joseph Grau is 1508868456, a Type 1 (individual) record in the CMS NPPES registry.

Where does Joseph Grau practice?

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

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-01-02.