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

Dr. Mark Lamont Walker, M.D., F.A.C.S.

Surgery Physician in Atlanta, GA · enumerated 2006.

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

National Provider Identifier

1356382345

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Registry record

Entity type Individual (Type 1)
Name Dr. Mark Lamont Walker
Credential M.D., F.A.C.S.
Sex Male
Practice address Atlanta, GA, 30315
Phone (404) 761-7482
Fax (404) 761-8398
Enumeration date Jun 9, 2006
Last updated in NPPES Mar 26, 2015

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

Taxonomy & licenses

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License 026953 (GA) Primary
2086S0102X Surgical Critical Care Physician Allopathic & Osteopathic Physicians · License 026953 (GA) 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
000298284E 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.

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Frequently asked questions

Where does Mark Walker practice?
The practice location on file with NPPES is in Atlanta, GA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Mark Walker?
The National Provider Identifier (NPI) for Mark Walker is 1356382345, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-03-26.