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

Dr. Oliver Lee Gregory, M.D.

Psychiatry Physician in Chattanooga, TN · enumerated 2006 · practices at Scenic City Alliance of Psychiatry and Psychotherapy Pllc.

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

National Provider Identifier

1588772545

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Registry record

Entity type Individual (Type 1)

Name Dr. Oliver Lee Gregory

Credential M.D.

Sex Male

Practice address Chattanooga, TN, 37421

Phone (423) 648-9290

Fax (423) 499-2308

Enumeration date Aug 29, 2006

Last updated in NPPES Jan 3, 2019

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

Taxonomy & licenses

2084P0804X Child & Adolescent Psychiatry Physician Allopathic & Osteopathic Physicians · License 19965 (TN) Secondary

2084P0800X Psychiatry Physician Allopathic & Osteopathic Physicians · License 19965 (TN) 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
4025692	Other	TN	BLUE CROSS
4382001	Other	TN	AETNA
3870075	Medicaid	TN	-
E50707	Other	TN	UPIN

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

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.

What specialty is Oliver Gregory?

Oliver Gregory is registered in NPPES with the primary taxonomy of Psychiatry Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-01-03.