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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Sonja Dietta Mayo, LMSW

Social Worker in Hart, MI · enumerated 2017.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1013445725

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Registry record

Entity type Individual (Type 1)
Name Sonja Dietta Mayo
Credential LMSW
Sex Female
Practice address Hart, MI, 49420
Phone (231) 873-6900
Fax (231) 873-1825
Enumeration date May 24, 2017
Last updated in NPPES Dec 29, 2021

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

Taxonomy & licenses

104100000X Social Worker Behavioral Health & Social Service Providers · License 6801089271 (MI) 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.

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Frequently asked questions

Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
What specialty is Sonja Mayo?
Sonja Mayo is registered in NPPES with the primary taxonomy of Social Worker. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-12-29.