NPPES file of Aug 9, 2026

William Thornton, PMHNP

Psychiatric/Mental Health Nurse Practitioner · Somerville, MA

William Thornton, PMHNP is a psychiatric/mental health nurse practitioner with a practice address in Somerville, Massachusetts, and NPI 1225842065, issued on Feb 3, 2025. Check the license (Massachusetts RN2352821, as entered in NPPES) with the Massachusetts board that licenses this profession; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1225842065
Name
William Thornton
Credential
PMHNP
Primary taxonomy
Psychiatric/Mental Health Nurse Practitioner 363LP0808X
License number
RN2352821 MA
Self-reported in NPPES; status is on the state search
Practice location
165 Hudson St Apt 1, Somerville, MA 02144
Phone
(610) 291-1489
Enumerated
Feb 3, 2025
Record last updated
Aug 26, 2025
Medicare enrollment
Enrolled (PECOS I20250930004214); accepts Medicare assignment
Telehealth
Offers telehealth (CMS)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
Download card Updates feed

8 nearest psychiatric/mental health nurse practitioner records → All 2,169 in Massachusetts → Look up another NPI →

Verify William Thornton in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Massachusetts board licenses this profession
    Search for license RN2352821    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the Massachusetts license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

Is this page about you? You can ask us to correct, restrict or remove it: how.

Bills Medicare through one group practice

  1. Katherine J Atkinson MD PCAmherst, MA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

William Thornton among 2,169 psychiatric/mental health nurse practitioner records in Massachusetts

William Thornton, 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 2025, is newer than 85% of them.

  • NPI issued2025 · 85% of these records are older, 5% newer
  • In a Medicare fileYes · 74% of these records are
  • In the CMS Doctors and Clinicians fileYes · 60% of these records are
  • Graduated2023 · 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).

Psychiatric/Mental Health Nurse Practitioner providers in Massachusetts

There are 2,169 psychiatric/mental health nurse practitioner records in Massachusetts.

All 2,169 in Massachusetts → Every provider in Somerville → Psychiatric/Mental Health Nurse Practitioner nationwide →

The 8 psychiatric/mental health nurse practitioner records with the nearest ZIP codes

  1. Alicia Battles, PMHNP-BC, APRNSomerville, MA 021441083286710
  2. Donn BullensSomerville, MA 021441104366608
  3. Yixi Dong, PMHNP-BCSomerville, MA 021441780342386
  4. Lauren LinsmeierSomerville, MA 021441134869779
  5. Jennifer Michael, RN/NPSomerville, MA 021441831460161
  6. Katelyn Page, APRNSomerville, MA 021441336061399
  7. Sandra Auguste, PMHNPSomerville, MA 021451649693706
  8. Samuelle Jean CharlesSomerville, MA 021451174365118

Common questions

What is William Thornton, PMHNP's NPI number?

William Thornton, PMHNP's National Provider Identifier (NPI) is 1225842065, issued on Feb 3, 2025. An NPI identifies a provider in billing; it is not a license.

Where is William Thornton, PMHNP located?

The NPPES record lists a practice address at 165 Hudson St Apt 1, Somerville, MA, 02144. Phone: (610) 291-1489. Providers update this record themselves, so call before visiting.

How can I verify William Thornton, PMHNP's license?

NPPES lists Massachusetts license number RN2352821, as entered by the provider. Search the Massachusetts board that licenses this profession; the NPPES record confirms identity 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.