Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Mr. Adam Gordon O'Brien, APRN, RN, PMHNP-BC

Individual provider Psychiatric/Mental Health Nurse Practitioner · NPI 1801592951

Mr. Adam Gordon O'Brien, APRN, RN, PMHNP-BC is a Nurse Practitioner in Valhalla, New York. Qualified in 2022, 4 years ago. Practices with Westchester Medical Center Advanced Physician Services PC, a 880-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Connecticut, New Hampshire, New Jersey and New York.

Years since qualifying
4
Licensed in
CT, NH, NJ, NY
In the registry since
2023
Specialties on file
7
What do these letters mean?
APRN — Advanced Practice Registered Nurse
The umbrella licence covering nurse practitioners, midwives, anaesthetists and clinical nurse specialists.
RN — Registered Nurse
A licensed nurse who completed a nursing degree and passed the NCLEX-RN examination.
PMHNP-BC — Psychiatric-Mental Health Nurse Practitioner, Board Certified
A board-certified psychiatric nurse practitioner.

See every abbreviation used in this directory →

Practice location Address checks out

100 Woods Rd
Valhalla, NY 10595-1530
Phone: (914) 493-7182
Fax: (914) 493-7152
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 600c Lake St, Ramsey, NJ 07446-1360 — (201) 707-4722

Specialties & licences

Psychiatric/Mental Health Nurse Practitioner (primary) Taxonomy 363LP0808X · Licence 404805 (NY)
Psychiatric/Mental Health Nurse Practitioner Taxonomy 363LP0808X · Licence 09190023 (NH)
Psychiatric/Mental Health Nurse Practitioner Taxonomy 363LP0808X · Licence 011631 (CT)
Psychiatric/Mental Health Nurse Practitioner Taxonomy 363LP0808X · Licence 26NJ01472800 (NJ)
Registered Nurse Taxonomy 163W00000X · Licence 10.180247 (CT)
Registered Nurse Taxonomy 163W00000X · Licence 668512 (NY)
Registered Nurse Taxonomy 163W00000X · Licence 26NR15624200 (NJ)

Record details

NPI number1801592951
Entity typeIndividual (Type 1)
GenderMale
Credentials APRN , RN , PMHNP-BC
Sole proprietorNo
NPI enumeratedJanuary 31, 2023
Last updated in NPPESAugust 7, 2026
Certification dateAugust 7, 2026

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyNURSE PRACTITIONER
Medical schoolOTHER
Graduated 2022 (4 years in practice)
Group practice Westchester Medical Center Advanced Physician Services Pc — 880 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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