Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mallory Williams, M.D.

Trauma Surgery Physician in Washington, DC · enumerated 2006.

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

National Provider Identifier

1669488003

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Registry record

Entity type Individual (Type 1)

Name Mallory Williams

Credential M.D.

Sex Male

Practice address 2041 Georgia Ave Nw Ste 4000, Washington, DC, 20060

Phone (202) 865-3785

Fax (202) 865-3136

Enumeration date Jul 31, 2006

Last updated in NPPES Jan 14, 2026

Taxonomy & licenses

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License 227496 (MA) Secondary

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License MD041969 (DC) Secondary

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License 35.095349 (OH) Secondary

2086S0127X Trauma Surgery Physician Allopathic & Osteopathic Physicians · License 35.095349 (OH) Primary

2086S0102X Surgical Critical Care Physician Allopathic & Osteopathic Physicians · License 35.095349 (OH) 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
1184071	Medicaid	LA	-
086515600	Medicaid	DC	-

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

Where does Mallory Williams practice?

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

What is the NPI number for Mallory Williams?

The National Provider Identifier (NPI) for Mallory Williams is 1669488003, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-01-14.