Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Margaret Meave Johnson Sullivan, ACSW
Clinical Social Worker in Ukiah, CA · enumerated 2022.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1891439766
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Registry record
Entity type Individual (Type 1)
Name Margaret Meave Johnson Sullivan
Credential ACSW
Sex Female
Practice address 589 Low Gap Rd, Ukiah, CA, 95482
Phone (707) 234-6902
Enumeration date Apr 26, 2022
Last updated in NPPES Apr 26, 2022
Taxonomy & licenses
1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 107719 (CA) Primary
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.
Frequently asked questions
How do I verify Margaret Meave Sullivan's NPI record?
Cross-check NPI 1891439766 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1891439766 active?
Yes, as of the latest NPPES snapshot, NPI 1891439766 is active (record last updated 2022-04-26).
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-04-26.