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.

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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
Mailing address346 Bacon St, Waltham, MA 02451-7516

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