Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

William Walker, MD

Family Medicine Physician in Sumrall, MS · enumerated 2006.

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

National Provider Identifier

1184668246

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Registry record

Entity type Individual (Type 1)

Name William Walker

Credential MD

Sex Male

Practice address Merit Health Medical Group-Sumrall, 4891 Hwy 589, Sumrall, MS, 39482

Phone (601) 758-4606

Fax (601) 758-4615

Enumeration date Jun 16, 2006

Last updated in NPPES Jan 6, 2022

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 08061 (MS) Primary

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License 08061 (MS) Secondary

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
00019522	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 is the NPI number for William Walker?

The National Provider Identifier (NPI) for William Walker is 1184668246, a Type 1 (individual) record in the CMS NPPES registry.

Where does William Walker practice?

The practice location on file with NPPES is in Sumrall, MS. Providers can have multiple locations; NPPES lists the primary practice address.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-01-06.