Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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MS. Nan Nally-Seif, LCSW

Individual provider Clinical Social Worker · NPI 1578627030

MS. Nan Nally-Seif, LCSW is a Clinical Social Worker in New York, New York. Qualified in 1974, 52 years ago. Practices as a sole proprietor and accepts Medicare assignment. Licensed in New Jersey and New York.

Years since qualifying
52
Licensed in
NJ, NY
In the registry since
2006
Specialties on file
2
What do these letters mean?
LCSW — Licensed Clinical Social Worker
A social worker licensed to diagnose and treat mental health conditions independently.

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Practice location Address checks out

19 W 34th St Ph
New York, NY 10001-3006 Not confirmed with CMS for 12 years — call before visiting
Phone: (212) 947-7111
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Clinical Social Worker (primary) Taxonomy 1041C0700X · Licence R015676 (NY)
Clinical Social Worker Taxonomy 1041C0700X · Licence SC13712 (NJ)

Record details

NPI number1578627030
Entity typeIndividual (Type 1)
GenderFemale
Credentials LCSW
Sole proprietorYes
NPI enumeratedDecember 20, 2006
Last updated in NPPESJanuary 22, 2014

Medicare enrollment

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

Medicare specialtyCLINICAL SOCIAL WORKER
Medical schoolOTHER
Graduated 1974 (52 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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