NPI Portal NPI Lookup & Verification

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

Gregory G Ennis, M.D.

Physical Medicine & Rehabilitation Physician in Evansville, IN · enumerated 2006.

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

National Provider Identifier

1780783183

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Registry record

Entity type Individual (Type 1)
Name Gregory G Ennis
Credential M.D.
Sex Male
Practice address Evansville, IN, 47714
Phone (812) 476-9983
Fax (812) 476-3809
Enumeration date Sep 22, 2006
Last updated in NPPES Apr 20, 2011

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

Taxonomy & licenses

208100000X Physical Medicine & Rehabilitation Physician Allopathic & Osteopathic Physicians · License 01051903A (IN) 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
610186900 Other IN FECA PIN
610186900 Other IN BLACK LUNG PIN
64003460 Medicaid KY -
145885 Other IN UMWA PIN
423127 Other IN HEALTHLINK NONPAR PIN
1761906 Other IN FIRST HEALTH PIN
064756 Other IN HAMP PIN
000000078150 Other IN BCBS PIN

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 Gregory Ennis practice?
The practice location on file with NPPES is in Evansville, IN. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Gregory Ennis?
The National Provider Identifier (NPI) for Gregory Ennis is 1780783183, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-04-20.