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

Mrs. Catherine Mattei-Williams, APRN, RNCS

Individual provider Geropsychiatric Psychiatric/Mental Health Clinical Nurse Specialist · NPI 1982791364

Mrs. Catherine Mattei-Williams, APRN, RNCS is a Geropsychiatric Psychiatric/Mental Health Clinical Nurse Specialist in Somerville, Massachusetts. Works from 3 locations. Licensed in Hawaii, Indiana, Massachusetts and New Hampshire.

Licensed in
HI, IN, MA, NH
In the registry since
2006
Specialties on file
5
What do these letters mean?
APRN — Advanced Practice Registered Nurse
The umbrella licence covering nurse practitioners, midwives, anaesthetists and clinical nurse specialists.

See every abbreviation used in this directory →

Practice location Address checks out

26 Central St
Somerville, MA 02143-2827
Phone: (617) 591-6377
Show map & directions

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

Additional practice locations (2)

  • 850 N Meridian St, Indianapolis, IN 46204-1098 — (317) 612-2723
  • 7 Prospect St., Nashua, NH 03060 — (603) 889-6147

Specialties & licences

Adult Psychiatric/Mental Health Clinical Nurse Specialist (primary) Taxonomy 364SP0809X · Licence 70000133A (IN)
Geropsychiatric Psychiatric/Mental Health Clinical Nurse Specialist Taxonomy 364SP0813X · Licence 078750-23 (NH)
Clinical Nurse Specialist Taxonomy 364S00000X · Licence RN2297886 (MA)
Geropsychiatric Psychiatric/Mental Health Clinical Nurse Specialist Taxonomy 364SP0813X · Licence 70000133A (HI)
Psychiatric/Mental Health Clinical Nurse Specialist Taxonomy 364SP0808X · Licence 078750-23 (NH)

Record details

NPI number1982791364
Entity typeIndividual (Type 1)
GenderFemale
Credentials APRN , RNCS
Sole proprietorNo
NPI enumeratedOctober 6, 2006
Last updated in NPPESMarch 7, 2023
Certification dateOctober 13, 2020