Mary Happ, PMHNP
NPI 1538972930 · Psychiatric/Mental Health Nurse Practitioner · Jamestown, NY
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mary Happ, PMHNP is a Psychiatric/Mental Health Nurse Practitioner provider in Jamestown, NY (NPI 1538972930).
Provider details
- NPI number
- 1538972930
- Entity type
- Individual
- Primary specialty
- Psychiatric/Mental Health Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PMHNP
- Sex
- Female
- Sole proprietor
- Yes
- License
- 406665 (NY)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
1 yr in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2025-01-29
- Last updated
- 2025-01-29
- Certified
- 2025-01-29
Frequently asked questions
- What is Mary Happ's NPI number?
- Mary Happ's National Provider Identifier (NPI) is 1538972930, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Happ's specialty?
- Mary Happ is listed in the NPPES registry with a primary specialty of Psychiatric/Mental Health Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Mary Happ located?
- Mary Happ's practice location on file with NPPES is 107 Institute St, Jamestown, NY 14701-6628.
- What is Mary Happ's phone number?
- The practice phone number listed in the NPPES registry for Mary Happ is (716) 484-4334.
- Does Mary Happ accept Medicare?
- Mary Happ is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mary Happ's NPI active?
- Yes — Mary Happ's NPI (1538972930) is active in the NPPES registry as of the last update on 2025-01-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.