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MARK NAHNSEN LCSW
NPI 1831480128
Social Worker - Clinical in Woodstock, NY

Active since April 21, 2011
339 OHAYO MOUNTAIN RD, WOODSTOCK, NY 12498(845) 679-6429(845) 331-4875 Get Directions Write a Review

NPPES record last updated: April 21, 2011. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Mark Nahnsen Lcsw NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MARK NAHNSEN LCSW (NPI 1831480128) is an individual clinical provider in Woodstock, New York, licensed in New York (077353-1) and active in the NPI registry since April 2011.

NPPES Registry Identity

NPI1831480128
Entity TypeIndividualMale
Primary Taxonomy1041C0700X
Provider Legal NameMARK NAHNSENCredential: LCSW
Location Address339 OHAYO MOUNTAIN RDWoodstock, NY 12498-2519
Mailing Address339 Ohayo Mnt RoadWoodstock, NY 12498-2519 · (845) 679-6429 · Fax (845) 331-4875
Phone(845) 679-6429
Fax(845) 331-4875
Sole ProprietorYes
Enumeration DateApril 21, 2011
✔ NPI 1831480128 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySocial Worker · ClinicalBehavioral Health & Social Service Providers
Taxonomy Code1041C0700X
License✔ Licensed in NY · 077353-1
Definition
A social worker who holds a master's or doctoral degree in social work from an accredited school of social work in addition to at least two years of post-master's supervised experience in a clinical setting. The social worker must be licensed, certified, or registered at the clinical level in the jurisdiction of practice. A clinical social worker provides direct services, including interventions focused on interpersonal interactions, intrapsychic dynamics, and life management issues. Clinical social work services are based on bio-psychosocial perspectives. Services consist of assessment, diagnosis, treatment (including psychotherapy and counseling), client-centered advocacy, consultation, evaluation, and prevention of mental illness, emotional, or behavioral disturbances.
339 OHAYO MOUNTAIN RD, Woodstock, NY 12498
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Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Mark Nahnsen's NPI number?

The NPI number for Mark Nahnsen is 1831480128. It was assigned to this individual provider in the NPPES registry on April 21, 2011.

Where is Mark Nahnsen located?

Mark Nahnsen practices at 339 Ohayo Mountain Rd, Woodstock, NY 12498. The listed phone number is (845) 679-6429.

What is Mark Nahnsen's specialty?

The primary specialty registered for this NPI is Social Worker, specializing in Clinical, with taxonomy code 1041C0700X.

When was this NPI record last updated?

The NPPES record for Mark Nahnsen was last updated on April 21, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.