Ms. Cathy Sullivan

Ms. Cathy Sullivan is a Social Worker provider (Social Worker) practicing in Hingham, MA, registered in the NPPES registry with NPI 1770712598 since 2009.

✓ Active NPI ✓ Valid NPI checksum Sole proprietor

NPI	1770712598
Entity type	Individual (Type 1)
Name	Ms. Cathy Sullivan
Sex	Female
Practice address	Hingham, MA, 02043
Phone	7817997534
Enumeration date	2009-07-14
Last updated in NPPES	2009-07-14

Street address withheld — NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

Taxonomy code	Specialty	Primary	License	State
104100000X	Social Worker	Primary	—	—

Copy-ready billing details

Provider: Cathy Sullivan
NPI: 1770712598
Taxonomy: 104100000X (Social Worker)
Address: Hingham, MA, 02043

Verify this record

Cross-check NPI 1770712598 against the authoritative CMS record: view Ms. Cathy Sullivan on the official NPPES registry .

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes — even if the provider moves or changes specialty. Read the full guide or validate an NPI number.

Frequently asked questions

How do I verify Cathy Sullivan's NPI record?

Cross-check NPI 1770712598 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1770712598 active?

Yes — as of the latest NPPES snapshot, NPI 1770712598 is active (record last updated 2009-07-14).

Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2009-07-14.