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WILLIAM MICHAEL DAY MSW
NPI 1184934309
Social Worker in New York, NY

Active since October 21, 2010
423 E 23RD ST, NEW YORK, NY 10010(212) 686-7500 Get Directions Write a Review

NPPES record last updated: October 21, 2010. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About William Michael Day Msw NPPES

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

WILLIAM MICHAEL DAY MSW (NPI 1184934309) is an individual social worker in New York, New York and active in the NPI registry since October 2010.

NPPES Registry Identity

NPI1184934309
Entity TypeIndividualMale
Primary Taxonomy104100000X
Provider Legal NameWILLIAM MICHAEL DAYCredential: MSW
Location Address423 E 23RD STNew York, NY 10010-5011
Mailing Address506 Fort Washington Ave, Apt 6hNew York, NY 10033-2049 · (312) 513-2568
Phone(212) 686-7500
Sole ProprietorNo
Enumeration DateOctober 21, 2010
✔ NPI 1184934309 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySocial WorkerBehavioral Health & Social Service Providers
Taxonomy Code104100000X
Definition
A social worker is a person who is qualified by a Social Work degree, and licensed, certified or registered by the state as a social worker to practice within the scope of that license. A social worker provides assistance and counseling to clients and their families who are dealing with social, emotional and environmental problems. Social work services may be rendered to individuals, families, groups, and the public.
423 E 23RD ST, New York, NY 10010
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Other Providers at the Same Location NPPES 20

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

DR. JASON H EPSTEIN MD
Anesthesiology (Pain Medicine)
423 E 23RD ST
NEW YORK, NY 10010
New York County (212) 686-7500
MR. GREG DATILES GONZALES RRT-NPS, RPFT, AEC
Respiratory Therapist, Registered (Critical Care)
423 E 23RD ST, RESPIRATORY CARE SERVICES ROOM 13095S
NEW YORK, NY 10010
New York County (212) 686-7500
DR. LAMONT JORDAN BARLOW
Urology
423 E 23RD ST
NEW YORK, NY 10010
New York County (212) 686-7500
MRS. PASCALE FILS-AIME RRT
Respiratory Therapist, Registered (General Care)
423 E 23RD ST, RESPIRATORY CARE RM 13090S
NEW YORK, NY 10010
New York County (212) 686-7500
MS. COURTNEY DUNN LCSW
Social Worker (Clinical)
423 E 23RD ST
NEW YORK, NY 10010
New York County (212) 686-7500
DR. PATRICK COLIN MALLOY M.D.
Radiology (Vascular & Interventional Radiology)
423 E 23RD ST, RADIOLOGY SERVICE
NEW YORK, NY 10010
New York County (212) 686-7500
CARLA ASSENZA LMSW
Social Worker
423 E 23RD ST
NEW YORK, NY 10010
New York County (212) 686-7500
CARA MARY OCHSENREITER LMSW
Social Worker
423 E 23RD ST
NEW YORK, NY 10010
New York County (347) 216-5546

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 Day's NPI number?

The NPI number for William Day is 1184934309. It was assigned to this individual provider in the NPPES registry on October 21, 2010.

Where is William Day located?

William Day practices at 423 E 23rd St, New York, NY 10010. The listed phone number is (212) 686-7500.

What is William Day's specialty?

The primary specialty registered for this NPI is Social Worker with taxonomy code 104100000X.

When was this NPI record last updated?

The NPPES record for William Day was last updated on October 21, 2010. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.