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

William O'Connor, CASAC

Individual provider Addiction (Substance Use Disorder) Counselor · NPI 1538343835

William O'Connor, CASAC is an Addiction (Substance Use Disorder) Counselor in New York, New York. Licensed in New York. Registered with an NPI since 2007.

Licensed in
NY
In the registry since
2007

Practice location Address checks out

2 Washington St 9th Fl Rina
New York, NY 10004-1008
Phone: (212) 425-2900
Fax: (212) 363-8530
Show map & directions

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

Specialties & licences

Addiction (Substance Use Disorder) Counselor (primary) Taxonomy 101YA0400X · Licence 18694 (NY)

Record details

NPI number1538343835
Entity typeIndividual (Type 1)
GenderMale
Credentials CASAC
Sole proprietorNo
NPI enumeratedDecember 21, 2007
Last updated in NPPESDecember 21, 2007

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