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

WILLIAM L SULLIVAN LICSW
NPI 1174572853
Social Worker - Clinical in Yarmouth Port, MA

Active since May 09, 2006PECOS Enrolled
923 ROUTE 6A, UNIT T, YARMOUTH PORT, MA 02675(508) 362-5080 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About William L Sullivan Licsw NPPES

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

WILLIAM L SULLIVAN LICSW (NPI 1174572853) is an individual clinical provider in Yarmouth Port, Massachusetts, licensed in Massachusetts (111266) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1174572853
Entity TypeIndividualMale
Primary Taxonomy1041C0700X
Provider Legal NameWILLIAM L SULLIVANCredential: LICSW
Location Address923 ROUTE 6A, UNIT TYarmouth Port, MA 02675-2159
Mailing Address923 Route 6a, Unit TYarmouth Port, MA 02675-2159 · (508) 362-5080
Phone(508) 362-5080
Sole ProprietorNo
Enumeration DateMay 9, 2006
Last NPPES UpdateJuly 13, 2026
✔ NPI 1174572853 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 MA · 111266
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.
923 ROUTE 6A, Yarmouth Port, MA 02675
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Other Identifiers 1

Other111266MA · Licsw

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

William L Sullivan Licsw is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment– Home Health Agency– Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 02675 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$0.00 typical visit price
range $58.86 – $177.36
Typical copayment $0.00 (range $14.71 – $44.34)
Most-billed visit code NA
Established Patient
$73.22 typical visit price
range $19.11 – $144.84
Typical copayment $18.30 (range $4.77 – $36.21)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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.

MARY-JANE BEACH M.ED.
Marriage & Family Therapist
923 ROUTE 6A, BUILDING 7, 2ND FLOOR
YARMOUTH PORT, MA 02675
Barnstable County (508) 362-7692
JUDITH RECKNAGEL MD
Internal Medicine
923 ROUTE 6A
YARMOUTHPORT, MA 02675
Barnstable County (508) 362-3188
CHERYL LYFORD LMHC
Counselor (Mental Health)
923 ROUTE 6A, SUITE T
YARMOUTH PORT, MA 02675
Barnstable County (508) 790-0577
GARY FORRISTER MD
Psychiatry & Neurology (Psychiatry)
923 ROUTE 6A, UNIT W
YARMOUTH PORT, MA 02675
Barnstable County (774) 994-8376
CHANDA DACAYANA BEATY NP
Nurse Practitioner (Adult Health)
923 ROUTE 6A, BUILDING 7 APEX HEALTH
YARMOUTHPORT, MA 02675
Barnstable County (508) 362-5999
ALYSSA DAVIS, LICSW, LLC
Community/Behavioral Health
923 ROUTE 6A
YARMOUTH PORT, MA 02675
Barnstable County (508) 859-0330
JOHN A. BEACH M.ED.
Psychologist (Cognitive & Behavioral)
923 ROUTE 6A, BUILDING 7, 2ND FLOOR
YARMOUTH PORT, MA 02675
Barnstable County (508) 362-7692
DR. CHRISTINE J AMIS IV M.D.
Psychiatry & Neurology (Psychiatry)
923 ROUTE 6A, SUNFLOWER MKT PLC UNIT N
YARMOUTH PORT, MA 02675
Barnstable County (508) 360-5195

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 Sullivan's NPI number?

The NPI number for William Sullivan is 1174572853. It was assigned to this individual provider in the NPPES registry on May 9, 2006.

Where is William Sullivan located?

William Sullivan practices at 923 Route 6A Unit T, Yarmouth Port, MA 02675. The listed phone number is (508) 362-5080.

What is William Sullivan's specialty?

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

Is William Sullivan enrolled in Medicare?

Yes. William Sullivan is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for William Sullivan was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 25 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.