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

Mrs. Mary Elizabeth Williams, RN

Individual provider Registered Nurse First Assistant · NPI 1215109939

Mrs. Mary Elizabeth Williams, RN is a Registered Nurse First Assistant in Riverhead, New York. Licensed in New York. Registered with an NPI since 2008.

Licensed in
NY
In the registry since
2008
Specialties on file
2
What do these letters mean?
RN — Registered Nurse
A licensed nurse who completed a nursing degree and passed the NCLEX-RN examination.

See every abbreviation used in this directory →

Practice location Address checks out

8 Sebastian Dr
Riverhead, NY 11901-1003
Phone: (631) 381-0354
Fax: (631) 381-0764
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Registered Nurse (primary) Taxonomy 163W00000X · Licence 551697 (NY)
Registered Nurse First Assistant Taxonomy 163WR0006X · Licence 551697-1 (NY)

Record details

NPI number1215109939
Entity typeIndividual (Type 1)
GenderFemale
Credentials RN
Sole proprietorNo
NPI enumeratedApril 2, 2008
Last updated in NPPESSeptember 12, 2022
Certification dateSeptember 12, 2022