Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

MR. SYLVESTER L SULLIVAN LCSW
NPI 1083481451
Social Worker - Clinical in Onalaska, WI

Active since December 06, 2023
571 BRAUND ST, ONALASKA, WI 54650(608) 792-5330 Get Directions Write a Review

NPPES record last updated: October 14, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Oct 14, 2026, Dec 6, 2023 (2 updates tracked since 2023).

About Mr. Sylvester L Sullivan Lcsw NPPES

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

MR. SYLVESTER L SULLIVAN LCSW (NPI 1083481451) is an individual clinical provider in Onalaska, Wisconsin, licensed in Wisconsin (13230-123) and active in the NPI registry since December 2023.

NPPES Registry Identity

NPI1083481451
Entity TypeIndividualMale
Primary Taxonomy1041C0700X
Provider Legal NameMR. SYLVESTER L SULLIVANCredential: LCSW
Location Address571 BRAUND STOnalaska, WI 54650-8556
Mailing Address571 Braund StOnalaska, WI 54650-8556 · (608) 785-7000 · Fax (608) 785-7477
Sole ProprietorNo
Enumeration DateDecember 6, 2023
Last NPPES UpdateOctober 14, 20262 updates tracked since enumeration
NPPES CertifiedOctober 14, 2026
✔ NPI 1083481451 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySocial Worker · ClinicalBehavioral Health & Social Service Providers
Taxonomy Code1041C0700X
License✔ Licensed in WI · 13230-123
Definition
A social worker who holds a master's or doctoral degree in social work from an accredited school of social work in addition to at least two years of post-master's supervised experience in a clinical setting. The social worker must be licensed, certified, or registered at the clinical level in the jurisdiction of practice. A clinical social worker provides direct services, including interventions focused on interpersonal interactions, intrapsychic dynamics, and life management issues. Clinical social work services are based on bio-psychosocial perspectives. Services consist of assessment, diagnosis, treatment (including psychotherapy and counseling), client-centered advocacy, consultation, evaluation, and prevention of mental illness, emotional, or behavioral disturbances.
571 BRAUND ST, Onalaska, WI 54650

Other Names 1

Professional Name (2)Mr. Sylvester L Sullivan Lcsw

Accepted Insurance

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.

Counselor (Professional)
571 BRAUND ST
ONALASKA, WI 54650
Counselor (Professional)
571 BRAUND ST
ONALASKA, WI 54650
Marriage & Family Therapist
571 BRAUND ST
ONALASKA, WI 54650
Social Worker (Clinical)
571 BRAUND ST
ONALASKA, WI 54650
Counselor (Professional)
571 BRAUND ST
ONALASKA, WI 54650
Counselor (Professional)
571 BRAUND ST
ONALASKA, WI 54650
Social Worker (Clinical)
571 BRAUND ST
ONALASKA, WI 54650
Social Worker (Clinical)
571 BRAUND ST
ONALASKA, WI 54650

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 Sylvester Sullivan's NPI number?

The NPI number for Sylvester Sullivan is 1083481451. It was assigned to this individual provider in the NPPES registry on December 6, 2023. The provider is also known as Mr. Sylvester L Sullivan Lcsw.

Where is Sylvester Sullivan located?

Sylvester Sullivan practices at 571 Braund St, Onalaska, WI 54650. The listed phone number is (608) 792-5330.

What is Sylvester Sullivan's specialty?

The primary specialty registered for this NPI is Social Worker, specializing in Clinical, with taxonomy code 1041C0700X.

What insurance does Sylvester Sullivan accept?

Health plans from Aspirus Health Plan, Dean Health Plan and Security Health Plan list Sylvester Sullivan as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Sylvester Sullivan was last updated on October 14, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 days 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.