Rachael Marie Nieznajomski, PA
Physician Assistant · Littleton, MA
Rachael Marie Nieznajomski, PA is a physician assistant with a practice address in Littleton, Massachusetts, and NPI 1306152657, issued on Aug 25, 2010. Check the license (Massachusetts PA4023, as entered in NPPES) with the Massachusetts board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Rachael Marie Nieznajomski
- Credential
- PA
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- PA4023 MA
Self-reported in NPPES; status is on the state search - Practice location
- 830 Constitution Ave, Littleton, MA 01460
- Phone
- (978) 287-8990
- Enumerated
- Aug 25, 2010
- Record last updated
- Jan 29, 2026
- Fax
- (978) 679-1825
- Medicare enrollment
- Enrolled (PECOS I20101104000589); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 4,713 in Massachusetts → Look up another NPI →
Also registered at 830 Constitution Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Rachel Battelli, PAPhysician Assistant1538856661
- Hayley Bryant, PAPhysician Assistant1558072058
- Courtney Lord, NPFamily Nurse Practitioner1174932099
Verify Rachael Marie Nieznajomski in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Massachusetts board licenses this profession
Search for license PA4023Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
56% fewer Medicare Part D claims than the average physician assistant in 2024
363 Medicare Part D claims for 250 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. Brand-name drugs were 4% of claims.
Most prescribed
- Prednisone44 claims
- Doxycycline Monohydrate33 claims
- Amoxicillin-Clavulanate Potass32 claims
- Albuterol Sulfate Hfa29 claims
- Azithromycin23 claims
- Cefpodoxime Proxetil23 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Emerson Practice Associates, IncConcord, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Rachael Marie Nieznajomski among 4,713 physician assistant records in Massachusetts
Rachael Marie Nieznajomski, PA is one of 4,713 physician assistant records with a practice address in Massachusetts. 78% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2010, is newer than 22% of them.
- NPI issued2010 · 22% of these records are older, 76% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated2010 · median 2019 among the 3,217 with a school on file
- Record last updated2026 · 38% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
3 physician assistant records list a practice address in Littleton
They are 3 of the 122 NPPES records with a practice address in Littleton, and 4,713 physician assistant records in Massachusetts.
All 4,713 in Massachusetts → Every provider in Littleton → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Rachel Battelli, PALittleton, MA 014601538856661
- Hayley Bryant, PALittleton, MA 014601558072058
- Kaitlyn Bolduc, PA-CPepperell, MA 014631811464043
- Robyn Ciriello, PA-CPepperell, MA 014631558720268
- Kalyn Barger, PA-CLeominster, MA 014531528339934
- Alexis Bergman, PA-CLeominster, MA 014531003627597
- Colbee Daigneault, PA-C, ATCLeominster, MA 014531841840006
- Amanda Diffin, PA-CLeominster, MA 014531710547385
Common questions
What is Rachael Marie Nieznajomski, PA's NPI number?
Rachael Marie Nieznajomski, PA's National Provider Identifier (NPI) is 1306152657, issued on Aug 25, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Rachael Marie Nieznajomski, PA located?
The NPPES record lists a practice address at 830 Constitution Ave, Littleton, MA, 01460. Phone: (978) 287-8990. Providers update this record themselves, so call before visiting.
How can I verify Rachael Marie Nieznajomski, PA's license?
NPPES lists Massachusetts license number PA4023, as entered by the provider. Search the Massachusetts board that licenses this profession; the NPPES record confirms identity only.
How much does Rachael Marie Nieznajomski, PA prescribe under Medicare Part D?
In 2024, Rachael Marie Nieznajomski, PA had 363 Medicare Part D claims for 250 beneficiaries; the average among physician assistant prescribers was 830. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.