Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.

Rachael Marie Nieznajomski, PA

Individual provider Physician Assistant · NPI 1306152657

Rachael Marie Nieznajomski, PA is a Physician Assistant in Littleton, Massachusetts. Qualified in 2010, 16 years ago. Practices with Emerson Practice Associates, Inc, a 247-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Massachusetts.

Years since qualifying
16
Licensed in
MA
In the registry since
2010
What do these letters mean?
PA — Physician Assistant
A licensed clinician who examines, diagnoses and treats under a physician's supervision.

See every abbreviation used in this directory →

Practice location Address checks out

830 Constitution Ave
Littleton, MA 01460
Phone: (978) 287-8990
Fax: (978) 679-1825
Show map & directions

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

Additional practice locations (1)

  • 123 Summer St, Worcester, MA 01608-1216 — (781) 438-0745

Specialties & licences

Physician Assistant (primary) Taxonomy 363A00000X · Licence PA4023 (MA)

Record details

NPI number1306152657
Entity typeIndividual (Type 1)
GenderFemale
Credentials PA
Sole proprietorNo
NPI enumeratedAugust 25, 2010
Last updated in NPPESJanuary 29, 2026
Certification dateJanuary 29, 2026

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyPHYSICIAN ASSISTANT
Medical schoolOTHER
Graduated 2010 (16 years in practice)
Group practice Emerson Practice Associates, Inc — 247 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations4 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients374
Services billed 697 a service is one billed item, such as a visit, a test or a procedure
Average patient age74

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Emerson Practice Associates, Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 247 clinicians in the practice; 12 are shown here.