NPI Portal NPI Lookup & Verification

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

Dr. Gregg Alan Dickerson, M.D.

Radiation Oncology Physician in Greenville, MS · enumerated 2005.

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

National Provider Identifier

1699777854

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Registry record

Entity type Individual (Type 1)
Name Dr. Gregg Alan Dickerson
Credential M.D.
Sex Male
Practice address Greenville, MS, 38703
Phone (662) 332-6150
Enumeration date Jun 1, 2005
Last updated in NPPES Nov 30, 2016

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

Taxonomy & licenses

174400000X Specialist Other Service Providers · License 17812 (MS) Secondary
2085R0001X Radiation Oncology Physician Allopathic & Osteopathic Physicians · License 47586 (CO) 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
10781438 Other MS UNITEDHEALTHCARE CAQH
896610 Other MN USA MANAGED CARE ORG

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 Gregg Dickerson?
Gregg Dickerson is registered in NPPES with the primary taxonomy of Radiation Oncology Physician. 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 2026-07-13. Provider record last updated 2016-11-30.