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

Individual provider Addiction (Substance Use Disorder) Counselor · NPI 1831484468

Deborah Ellen Knapp, LCSW is a Clinical Social Worker in Smithtown, New York. Qualified in 2000, 26 years ago. Practices as a sole proprietor and accepts Medicare assignment. Licensed in New York.

Years since qualifying
26
Licensed in
NY
In the registry since
2011
Specialties on file
4
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

267 E Main St Bldg B Ste 21-B
Smithtown, NY 11787
Phone: (631) 655-4495
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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 075442 (NY)
Addiction (Substance Use Disorder) Counselor Taxonomy 101YA0400X · Licence 075442 (NY)
Mental Health Counselor Taxonomy 101YM0800X · Licence 075442 (NY)
Professional Counselor Taxonomy 101YP2500X · Licence 075442 (NY)

Record details

NPI number1831484468
Entity typeIndividual (Type 1)
GenderFemale
Credentials LCSW
Sole proprietorYes
NPI enumeratedJune 11, 2011
Last updated in NPPESOctober 16, 2017
Mailing address267 E Main St, Blg B, Ste 21-B, Smithtown, NY 11787-2874

Medicare enrollment

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

Medicare specialtyCLINICAL SOCIAL WORKER
Medical schoolOTHER
Graduated 2000 (26 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations4 on file with Medicare

Other providers in Smithtown