Eunice Pereira Kowalczyk, DNP, PMHNP
Psychiatric/Mental Health Nurse Practitioner · Westborough, MA
Eunice Pereira Kowalczyk, DNP, PMHNP is a psychiatric/mental health nurse practitioner with a practice address in Westborough, Massachusetts, and NPI 1457995417, issued on Nov 3, 2019. Check the license (Massachusetts RN2277843, as entered in NPPES) with the Massachusetts board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Eunice Pereira Kowalczyk
- Credential
- DNP, PMHNP
- Primary taxonomy
- Psychiatric/Mental Health Nurse Practitioner 363LP0808X
- License number
- RN2277843 MA
Self-reported in NPPES; status is on the state search - Practice location
- 900 Union St, Westborough, MA 01581
- Phone
- (508) 856-0732
- Enumerated
- Nov 3, 2019
- Record last updated
- May 5, 2025
- Fax
- (508) 425-5126
- Medicaid ID
- 110157687A MA
- Medicare enrollment
- Enrolled (PECOS I20200507002665); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest psychiatric/mental health nurse practitioner records → All 2,169 in Massachusetts → Look up another NPI →
Also registered at 900 Union St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Leah Doret, M.D.Family Medicine Physician1699781039
Verify Eunice Pereira Kowalczyk in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Massachusetts board licenses this profession
Search for license RN2277843Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
1% fewer Medicare Part D claims than the average psychiatric/mental health nurse practitioner in 2024
899 Medicare Part D claims for 81 beneficiaries, against an average of 906 among the 30,717 providers of this specialty who prescribed in Part D. Brand-name drugs were 3% of claims.
Most prescribed
- Buspirone Hcl125 claims
- Sertraline Hcl82 claims
- Trazodone Hcl76 claims
- Duloxetine Hcl72 claims
- Quetiapine Fumarate71 claims
- Mirtazapine63 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
- Reliant Medical Group IncWestborough, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Eunice Pereira Kowalczyk among 2,169 psychiatric/mental health nurse practitioner records in Massachusetts
Eunice Pereira Kowalczyk, DNP, PMHNP is one of 2,169 psychiatric/mental health nurse practitioner records with a practice address in Massachusetts. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2019, is newer than 39% of them.
- NPI issued2019 · 39% of these records are older, 55% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated2019 · median 2021 among the 1,309 with a school on file
- Record last updated2025 · 23% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LP0808X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
10 psychiatric/mental health nurse practitioner records list a practice address in Westborough
They are 10 of the 565 NPPES records with a practice address in Westborough, and 2,169 psychiatric/mental health nurse practitioner records in Massachusetts.
All 2,169 in Massachusetts → Every provider in Westborough → Psychiatric/Mental Health Nurse Practitioner nationwide →
The 8 psychiatric/mental health nurse practitioner records with the nearest ZIP codes
- Kimberley Arcara, PMHNPWestborough, MA 015811609126689
- Alina Birch, PMHNP-BCWestborough, MA 015811780182667
- Elma Chauke, RNWestborough, MA 015811942072384
- Sarah Cosgrove, APRNWestborough, MA 015811346517158
- Jeremy Freund, NPWestborough, MA 015811588621122
- Lorrie JohnsonWestborough, MA 015811952225310
- Njideka Obijiaku, PMHNPWestborough, MA 015811184416471
- Paige Reynolds, NPWestborough, MA 015811528622826
Common questions
What is Eunice Pereira Kowalczyk, DNP, PMHNP's NPI number?
Eunice Pereira Kowalczyk, DNP, PMHNP's National Provider Identifier (NPI) is 1457995417, issued on Nov 3, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Eunice Pereira Kowalczyk, DNP, PMHNP located?
The NPPES record lists a practice address at 900 Union St, Westborough, MA, 01581. Phone: (508) 856-0732. Providers update this record themselves, so call before visiting.
How can I verify Eunice Pereira Kowalczyk, DNP, PMHNP's license?
NPPES lists Massachusetts license number RN2277843, as entered by the provider. Search the Massachusetts board that licenses this profession; the NPPES record confirms identity only.
How much does Eunice Pereira Kowalczyk, DNP, PMHNP prescribe under Medicare Part D?
In 2024, Eunice Pereira Kowalczyk, DNP, PMHNP had 899 Medicare Part D claims for 81 beneficiaries; the average among psychiatric/mental health nurse practitioner prescribers was 906. 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.