Independent US Healthcare Provider Directory & Public Medical Database
Active NPI 1467449512 Individual Practitioner Female Practitioner

Cathy Sizer , NP

Nurse Practitioner - Pediatrics • Westford, MA

Professional Overview & Biography Verified Profile Summary

Cathy Sizer, NP is a registered healthcare professional specializing in Nurse Practitioner - Pediatrics in Westford, MA. Practice services are available at 133 LITTLETON RD under active NPI credentials.

Practice Location & Contact Primary Location

Practice Address

133 Littleton Rd
Suite 101

Westford, MA 018863198

Telephone 9785770437
Fax 9786929904
Associated Practice Facility / Clinic
🏢 Westford Internal Medicine Pc Facility NPI 1609825413

Specialty Benchmarks & Practice Insights

Comparative analytics for Nurse Practitioner - Pediatrics in Westford, MA

Active Practitioner
Practitioner Clinical Experience
Active
City Avg: 23.5 Yrs
State Avg: 17.3 Yrs
Regional Practice Density
11 Specialists

Practicing in Westford, MA (1318 Statewide)

Telehealth Adoption Rate
0.0% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount
67.4% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Medical Specialties & State Licenses

Nurse Practitioner - Pediatrics Primary Specialty

NUCC Taxonomy Code: 363LP0200X

State License MA 153270

Definition to come...

Practice Associates & Co-Workers

Healthcare professionals and specialists practicing at this location or sharing practice phone/fax

38 Associated Practitioners
Deanna Hohmann , MSN, FNP-BC

Nurse Practitioner - Family

NPI 1003461302

Master of Science in Nursing, Family Nurse Practitioner (Board Certified)

Susan Jensen , NP

Nurse Practitioner - Pediatrics

NPI 1013359900

Nurse Practitioner

Bridget Albert , NP

Nurse Practitioner - Pediatrics

NPI 1023425543

Nurse Practitioner

Emily Grossman , CPNP

Nurse Practitioner - Pediatrics

NPI 1023643624

Certified Pediatric Nurse Practitioner

Patricia Jackson , RN, MSN, PPCNP-BC, P

Nurse Practitioner - Pediatrics

NPI 1053300855

Registered Nurse, Master of Science in Nursing, PPCNPBC, P

Lindsay Roy , NP

Nurse Practitioner - Pediatrics

NPI 1073043022

Nurse Practitioner

Career & Practice History Timeline

Chronological log of verified NPI updates, location relocations, credentials, and registry changes

6 Historical Events
NPI Profile Active July 08, 2007

NPI status registered as active in NPPES database

📍
Updated Practice Location July 08, 2007

Registered at 133 LITTLETON RD, SUITE 101, WESTFORD, MA 018863198 (Tel: 9785770437)

📍
Updated Business Mailing Address July 08, 2007

Registered at 346 BACON ST, WALTHAM, MA 024517516

👤
Provider Name / Credentials Updated July 08, 2007

Recorded as CATHY SIZER, NP

🎓
Medical Taxonomy / Specialty Registered (Primary Specialty) July 08, 2007

Nurse Practitioner (License #153270 in MA)

🟢
Initial NPI Registration & Enumeration October 04, 2005

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

Verified patient ratings, medical care experiences, and facility photos

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NPI Administrative Meta

NPI Number: 1467449512
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: October 04, 2005
Last Update: July 13, 2026
Sole Proprietor: No

Mailing Address

346 Bacon St

Waltham, MA 024517516

Public Domain Record This profile contains public domain information published by CMS and NPPES under the Freedom of Information Act (FOIA).
⚠️ Medical Disclaimer

This directory listing is for informational purposes only and does not constitute medical advice, diagnosis, or physician endorsement. If you are experiencing a medical emergency, please call 911 immediately.