Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mark T Phillips, M.D.

Urology Physician in Meridian, MS · enumerated 2007 · practices at Joel T Callahan Thomas H Greer Jr & A Gary Boone Ptr.

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

National Provider Identifier

1821124728

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Registry record

Entity type Individual (Type 1)

Name Mark T Phillips

Credential M.D.

Sex Male

Practice address 1600 22nd Ave, Medical Towers III, 3rd Floor, Meridian, MS, 39301

Phone (601) 693-1055

Fax (601) 482-5312

Enumeration date Feb 26, 2007

Last updated in NPPES Oct 24, 2024

Taxonomy & licenses

208800000X Urology Physician Allopathic & Osteopathic Physicians · License 11068 (MS) 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
0110336	Medicaid	MS	-

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 Phillips?

Mark Phillips 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 2024-10-24.