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

Cathy Sizer, NP

Individual provider Pediatric Nurse Practitioner · NPI 1467449512

Cathy Sizer, NP is a Pediatric Nurse Practitioner in Westford, Massachusetts. Licensed in Massachusetts. Registered with an NPI since 2005.

Licensed in
MA
In the registry since
2005
What do these letters mean?
NP — Nurse Practitioner
An advanced practice nurse who can diagnose, treat and in most states prescribe.

See every abbreviation used in this directory →

Practice location Address checks out

133 Littleton Rd Ste 101
Westford, MA 01886-3198
Phone: (978) 577-0437
Fax: (978) 692-9904
Show map & directions

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

Specialties & licences

Pediatric Nurse Practitioner (primary) Taxonomy 363LP0200X · Licence 153270 (MA)

Record details

NPI number1467449512
Entity typeIndividual (Type 1)
GenderFemale
Credentials NP
Sole proprietorNo
NPI enumeratedOctober 4, 2005
Last updated in NPPESJuly 13, 2026

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