Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Mallory Williams, MD

Individual provider Surgery Physician · NPI 1669488003

Mallory Williams, MD practises General Surgery in Washington, District of Columbia. Qualified in 1999, 27 years ago. Practices with Cook County, a 787-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in District of Columbia, Massachusetts and Ohio.

Years since qualifying
27
Licensed in
DC, MA, OH
In the registry since
2006
Specialties on file
5
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

2041 Georgia Ave NW Ste 4000
Washington, DC 20060-4228
Phone: (202) 865-3785
Fax: (202) 865-3136
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 3000 Arlington Ave, Toledo, OH 43614-2598 — (419) 383-4000

Specialties & licences

Trauma Surgery Physician (primary) Taxonomy 2086S0127X · Licence 35.095349 (OH)
Surgery Physician Taxonomy 208600000X · Licence 227496 (MA)
Surgery Physician Taxonomy 208600000X · Licence MD041969 (DC)
Surgery Physician Taxonomy 208600000X · Licence 35.095349 (OH)
Surgical Critical Care Physician Taxonomy 2086S0102X · Licence 35.095349 (OH)

Record details

NPI number1669488003
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 31, 2006
Last updated in NPPESJanuary 14, 2026
Certification dateJanuary 14, 2026

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyGENERAL SURGERY
Medical schoolOTHER
Graduated 1999 (27 years in practice)
Group practice Cook County — 787 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $19 1 payment · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Cook County

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 787 clinicians in the practice; 12 are shown here.

Other providers in Washington