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WILLIAM O'CONNOR CASAC
NPI 1538343835
Counselor - Addiction (Substance Use Disorder) in New York, NY

Active since December 21, 2007
2 WASHINGTON ST, 9TH FLOOR, RINA, NEW YORK, NY 10004(212) 425-2900(212) 363-8530 Get Directions Write a Review

NPPES record last updated: December 21, 2007. Verified against the NPPES registry weekly; last sync: October 04, 2026.

About William O'connor Casac NPPES

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

WILLIAM O'CONNOR CASAC (NPI 1538343835) is an individual addiction (substance use disorder) provider in New York, New York, licensed in New York (18694) and active in the NPI registry since December 2007.

NPPES Registry Identity

NPI1538343835
Entity TypeIndividualMale
Primary Taxonomy101YA0400X
Provider Legal NameWILLIAM O'CONNORCredential: CASAC
Location Address2 WASHINGTON ST, 9TH FLOOR, RINANew York, NY 10004-1008
Mailing Address2 Washington St, 9th Floor, RinaNew York, NY 10004-1008 · (212) 425-2900 · Fax (212) 363-8530
Phone(212) 425-2900
Fax(212) 363-8530
Sole ProprietorNo
Enumeration DateDecember 21, 2007
✔ NPI 1538343835 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyCounselor · Addiction (Substance Use Disorder)Behavioral Health & Social Service Providers
Taxonomy Code101YA0400X
License✔ Licensed in NY · 18694
2 WASHINGTON ST, New York, NY 10004
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Other Providers at the Same Location NPPES 11

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

EXPONENTS
Clinic/Center (Rehabilitation, Substance Use Disorder)
2 WASHINGTON ST, 4TH FLOOR
NEW YORK, NY 10004
New York County (212) 243-3434
MRS. NAOMI VAUGHAN-WEAVER CASAC
Counselor (Addiction (Substance Use Disorder))
2 WASHINGTON ST, 9TH FLOOR
NEW YORK, NY 10004
New York County (212) 425-2900
MS. LAURA ROEMER
Counselor (Addiction (Substance Use Disorder))
2 WASHINGTON ST, 9TH FLOOR
NEW YORK, NY 10004
New York County (212) 425-5051
MISS SENEM ZEYTINOGLU
Social Worker
2 WASHINGTON ST
NEW YORK, NY 10004
New York County (212) 425-2900
MELISSA RIOS
Social Worker
2 WASHINGTON ST, 4TH FLOOR
NEW YORK, NY 10004
New York County (212) 243-3434
RONALD HOOD CASAC
Counselor (Addiction (Substance Use Disorder))
2 WASHINGTON ST, 9TH FL
NEW YORK, NY 10004
New York County (212) 442-6187
ELIZABETH BAEZ
Social Worker
2 WASHINGTON ST
NEW YORK, NY 10004
New York County (212) 898-7830
ANNA URYASH
Social Worker
2 WASHINGTON ST, 9TH FLOOR
NEW YORK, NY 10004
New York County (212) 425-2900

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 William O'connor's NPI number?

The NPI number for William O'connor is 1538343835. It was assigned to this individual provider in the NPPES registry on December 21, 2007.

Where is William O'connor located?

William O'connor practices at 2 Washington St 9th Floor, Rina, New York, NY 10004. The listed phone number is (212) 425-2900.

What is William O'connor's specialty?

The primary specialty registered for this NPI is Counselor, specializing in Addiction (Substance Use Disorder), with taxonomy code 101YA0400X.

When was this NPI record last updated?

The NPPES record for William O'connor was last updated on December 21, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.