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

Mr. William Joseph Harker, LCSW, BCD

Individual provider Clinical Social Worker · NPI 1811045784

Mr. William Joseph Harker, LCSW, BCD is a Clinical Social Worker in Chester, New York. Qualified in 1977, 49 years ago. Practices as a sole proprietor and accepts Medicare assignment. Licensed in New York.

Years since qualifying
49
Licensed in
NY
In the registry since
2007
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

105 Main St
Chester, NY 10918-1354
Phone: (845) 469-5395
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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 PR020169-1 (NY)

Record details

NPI number1811045784
Entity typeIndividual (Type 1)
GenderMale
Credentials LCSW , BCD
Sole proprietorYes
NPI enumeratedJanuary 8, 2007
Last updated in NPPESAugust 6, 2010

Medicare enrollment

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

Medicare specialtyCLINICAL SOCIAL WORKER
Medical schoolOTHER
Graduated 1977 (49 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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