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

Dr. Mercedes Merritt Williams, DBH, MPH, IPEC, LMSW

Public Health & General Preventive Medicine Physician in Douglasville, GA · enumerated 2017.

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

National Provider Identifier

1952820086

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Registry record

Entity type Individual (Type 1)

Name Dr. Mercedes Merritt Williams

Credential DBH, MPH, IPEC, LMSW

Sex Female

Practice address Douglasville, GA, 30135

Phone (678) 310-9707

Enumeration date Sep 9, 2017

Last updated in NPPES Jul 21, 2022

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

Taxonomy & licenses

103K00000X Behavior Analyst Behavioral Health & Social Service Providers · License 40044 (CA) Secondary

103TP2701X Group Psychotherapy Psychologist Behavioral Health & Social Service Providers · License 28315 (IN) Secondary

2083P0901X Public Health & General Preventive Medicine Physician Allopathic & Osteopathic Physicians · License 28315 (IN) 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

What specialty is Mercedes Williams?

Mercedes Williams is registered in NPPES with the primary taxonomy of Public Health & General Preventive Medicine Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-07-21.