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

Mary Kathleen Martin Nurse Practitioner in Psychiatry, PLLC

Organization Prescribing (Medical) Psychologist · NPI 1578921623

Mary Kathleen Martin Nurse Practitioner in Psychiatry, PLLC is a Prescribing (Medical) Psychologist in Riverhead, New York. Licensed in New York. Registered with an NPI since 2016.

Licensed in
NY
In the registry since
2016
What do these letters mean?
PLLC — Professional limited liability company
A form of business registration, not a clinical qualification.

See every abbreviation used in this directory →

Practice location Address checks out

21 W 2nd St Ste 11
Riverhead, NY 11901-2752
Phone: (631) 624-7839
Fax: (631) 865-5857
Show map & directions

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

Specialties & licences

Prescribing (Medical) Psychologist (primary) Taxonomy 103TP0016X · Licence 401909 (NY)

Record details

NPI number1578921623
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official Mary Martin — Owner · (631) 766-3210
NPI enumeratedFebruary 4, 2016
Last updated in NPPESFebruary 4, 2016
Mailing address375 W Mill Rd, Mattituck, NY 11952-2079