Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Mark Frederick Ellison, M.D.

Urology Physician in Athens, GA · enumerated 2005.

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

National Provider Identifier

1265431092

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Registry record

Entity type Individual (Type 1)

Name Dr. Mark Frederick Ellison

Credential M.D.

Sex Male

Practice address 2142 W Broad St, Building 200, Suite 200, Athens, GA, 30606

Phone (706) 612-9401

Fax (706) 612-9410

Enumeration date Jul 14, 2005

Last updated in NPPES Mar 7, 2023

Taxonomy & licenses

208800000X Urology Physician Allopathic & Osteopathic Physicians · License 026107 (GA) 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
000370994F	Medicaid	GA	-

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 specialty is Mark Ellison?

Mark Ellison is registered in NPPES with the primary taxonomy of Urology 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 2023-03-07.