MALLORY WILLIAMS M.D.
NPI 1669488003
Surgery - Trauma Surgery in Washington, DC
About Mallory Williams M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MALLORY WILLIAMS M.D. (NPI 1669488003) is an individual trauma surgery provider in Washington, District Of Columbia, licensed in Ohio (35.095349) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS, is affiliated with John H Stroger Jr Hospital, and maintains a secondary practice location in Toledo.
NPPES Registry Identity
Specialties & Licenses 3
Trauma surgery is a recognized subspecialty of general surgery. Trauma surgeons are physicians who have completed a five-year general surgery residency and usually continue with a one to two year fellowship in trauma and/or surgical critical care, typically leading to additional board certification in surgical critical care. There is no trauma surgery board certification at this point. To obtain board certification in surgical critical care, a fellowship in surgical critical care or anesthesiology critical care must be completed during or after general surgery residency.
Secondary Practice Location 1
Other Identifiers 2
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Mallory Williams M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Hospital Affiliations CMS Care Compare 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
John H Stroger Jr Hospital
Acute Care Hospitals · Chicago, ILUniversity Of Toledo Medical Center
Acute Care Hospitals · Toledo, OHOther Providers at the Same Location NPPES 6
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
WASHINGTON, DC 20060
WASHINGTON, DC 20060
WASHINGTON, DC 20060
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Mallory Williams's NPI number?
The NPI number for Mallory Williams is 1669488003. It was assigned to this individual provider in the NPPES registry on July 31, 2006.
Where is Mallory Williams located?
Mallory Williams practices at 2041 Georgia Ave NW Ste 4000, Washington, DC 20060. The listed phone number is (202) 865-3785.
What is Mallory Williams's specialty?
The primary specialty registered for this NPI is Surgery, specializing in Trauma Surgery, with taxonomy code 2086S0127X.
Is Mallory Williams enrolled in Medicare?
Yes. Mallory Williams is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
What insurance does Mallory Williams accept?
Health plans from CareSource and McLaren Health Plan Community list Mallory Williams as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Mallory Williams affiliated with any hospitals?
According to CMS data, Mallory Williams is affiliated with John H Stroger Jr Hospital and University Of Toledo Medical Center.
When was this NPI record last updated?
The NPPES record for Mallory Williams was last updated on January 14, 2026. NPI Profile syncs with the weekly NPPES data releases published by CMS.
