NPPES file of Aug 9, 2026

Mary Elizabeth Happ, PMHNP

Psychiatric/Mental Health Nurse Practitioner · Jamestown, NY

Mary Elizabeth Happ, PMHNP is a psychiatric/mental health nurse practitioner with a practice address in Jamestown, New York, and NPI 1538972930, issued on Jan 29, 2025. Check the license (New York 406665, as entered in NPPES) with the New York 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
1538972930
Name
Mary Elizabeth Happ
Credential
PMHNP
Primary taxonomy
Psychiatric/Mental Health Nurse Practitioner 363LP0808X
License number
406665 NY
Self-reported in NPPES; status is on the state search
Practice location
107 Institute St, Jamestown, NY 14701
Phone
(716) 484-4334
Enumerated
Jan 29, 2025
Record last updated
Jan 29, 2025
Fax
(833) 974-2027
Medicare enrollment
Enrolled (PECOS I20250303000746); accepts Medicare assignment
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.
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8 nearest psychiatric/mental health nurse practitioner records → All 4,129 in New York → Look up another NPI →

Also registered at 107 Institute St

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Brianna AndersonPharmacist1952992265
  2. Olivia Andriaccio, NPFamily Nurse Practitioner1902550502
  3. Jonathan Bellardo, PAFamily Medicine Physician1386439222
  4. Margaret Bird, PMHDNPPsychiatric/Mental Health Nurse Practitioner1659944171
  5. Christina Brown, MDInternal Medicine Physician1801892708
  6. Yvonne Calcaterra, LCSWClinical Social Worker1417103367

Verify Mary Elizabeth Happ in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich New York board licenses this profession
    Search for license 406665    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 New York 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.

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Bills Medicare through one group practice

  1. The Chautauqua Center IncJamestown, NY

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

Mary Elizabeth Happ among 4,129 psychiatric/mental health nurse practitioner records in New York

Mary Elizabeth Happ, PMHNP is one of 4,129 psychiatric/mental health nurse practitioner records with a practice address in New York. 68% 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 89% of them.

  • NPI issued2025 · 89% of these records are older, 4% newer
  • In a Medicare fileYes · 68% of these records are
  • In the CMS Doctors and Clinicians fileYes · 46% of these records are
  • Graduated2024 · median 2021 among the 1,914 with a school on file
  • Record last updated2025 · 34% 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 New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

11 psychiatric/mental health nurse practitioner records list a practice address in Jamestown

They are 11 of the 1,056 NPPES records with a practice address in Jamestown, and 4,129 psychiatric/mental health nurse practitioner records in New York.

All 4,129 in New York → Every provider in Jamestown → Psychiatric/Mental Health Nurse Practitioner nationwide →

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

  1. Margaret Bird, PMHDNPJamestown, NY 147011659944171
  2. Cassandra Brown, NPJamestown, NY 147011750967709
  3. Amanda BrownJamestown, NY 147011023966025
  4. Maryellen CarlucciJamestown, NY 147011528915907
  5. Laurie Fenton, NPJamestown, NY 147011053687186
  6. Mindy Johnson, R.NJamestown, NY 147011518333731
  7. Amanda Kent, PMHNPJamestown, NY 147011871254805
  8. Laiken LatimerJamestown, NY 147011396402277

Common questions

What is Mary Elizabeth Happ, PMHNP's NPI number?

Mary Elizabeth Happ, PMHNP's National Provider Identifier (NPI) is 1538972930, issued on Jan 29, 2025. An NPI identifies a provider in billing; it is not a license.

Where is Mary Elizabeth Happ, PMHNP located?

The NPPES record lists a practice address at 107 Institute St, Jamestown, NY, 14701. Phone: (716) 484-4334. Providers update this record themselves, so call before visiting.

How can I verify Mary Elizabeth Happ, PMHNP's license?

NPPES lists New York license number 406665, as entered by the provider. Search the New York 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.