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

Mary Williams, RD

Individual provider Registered Dietitian · NPI 1588153969

Mary Williams, RD is a Registered Dietitian in Washington, District of Columbia. Registered with an NPI since 2018.

In the registry since
2018
What do these letters mean?
RD — Registered Dietitian
A credentialed nutrition professional.

See every abbreviation used in this directory →

Practice location Address checks out

50 Irving St NW
Washington, DC 20422-0001
Phone: (202) 745-8000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Registered Dietitian (primary) Taxonomy 133V00000X

Record details

NPI number1588153969
Entity typeIndividual (Type 1)
GenderFemale
Credentials RD
Sole proprietorNo
NPI enumeratedMay 1, 2018
Last updated in NPPESMay 1, 2018

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