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

Martha Marie Seymour, NPP

Individual provider Psychiatric/Mental Health Nurse Practitioner · NPI 1578646055

Martha Marie Seymour, NPP is a Psychiatric/Mental Health Nurse Practitioner in Riverhead, New York. Licensed in New York. Registered with an NPI since 2006.

Licensed in
NY
In the registry since
2006

Practice location Address checks out

300 Center Drive 2nd Fl Wing Riverhead Mental Health Clinic County Center Bldg
Riverhead, NY 11901
Phone: (631) 185-2144
Fax: (631) 852-1448
Show map & directions

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

Specialties & licences

Psychiatric/Mental Health Nurse Practitioner (primary) Taxonomy 363LP0808X · Licence F400622-1 (NY)

Record details

NPI number1578646055
Entity typeIndividual (Type 1)
GenderFemale
Credentials NPP
Sole proprietorNo
NPI enumeratedOctober 20, 2006
Last updated in NPPESJuly 8, 2007

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