NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Zerek Mayes, MSW, LCSW, EDD

Clinical Social Worker in Chicago, IL · enumerated 2011 · practices at Self Theory LLC.

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

National Provider Identifier

1104104223

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Registry record

Entity type Individual (Type 1)
Name Dr. Zerek Mayes
Credential MSW, LCSW, EDD
Sex Male
Practice address 770 N Halsted St Ste 306, Chicago, IL, 60642
Phone (779) 216-5681
Enumeration date Jul 22, 2011
Last updated in NPPES Apr 15, 2026

Taxonomy & licenses

251S00000X Community/Behavioral Health Agency Agencies · License 149024349 (IL) Secondary
261QM0801X Mental Health Clinic/Center (Including Community Mental Health Center) Ambulatory Health Care Facilities · License 149024349 (IL) Secondary
261QM0850X Adult Mental Health Clinic/Center Ambulatory Health Care Facilities · License 149024349 (IL) Secondary
101Y00000X Counselor Behavioral Health & Social Service Providers Secondary
251B00000X Case Management Agency Agencies · License 149024349 (IL) Secondary
261QM0855X Adolescent and Children Mental Health Clinic/Center Ambulatory Health Care Facilities · License 149024349 (IL) Secondary
1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 149024349 (IL) Primary
LCSW · Licensed Clinical Social Worker: A social worker licensed for clinical practice including mental-health therapy. About the LCSW credential

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 NPI 1104104223 active?
Yes, as of the latest NPPES snapshot, NPI 1104104223 is active (record last updated 2026-04-15).
How do I verify Zerek Mayes's NPI record?
Cross-check NPI 1104104223 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-04-15.