Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. Matthew Benjamin Williams, PH.D.

Psychologist in Marietta, GA · enumerated 2010 · practices at Pvc Georgia LLC.

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

National Provider Identifier

1205150794

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Registry record

Entity type Individual (Type 1)

Name Mr. Matthew Benjamin Williams

Credential PH.D.

Sex Male

Practice address 1640 Powers Ferry Rd Se Ste 100, Marietta, GA, 30067

Phone (770) 953-0080

Fax (770) 953-0031

Enumeration date Mar 26, 2010

Last updated in NPPES Nov 30, 2021

Taxonomy & licenses

103T00000X Psychologist Behavioral Health & Social Service Providers · License PSY27584 (CA) Secondary

103T00000X Psychologist Behavioral Health & Social Service Providers · License PSY004293 (GA) Primary

PHD · Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers. About the PHD credential

Other identifiers

Identifier	Type	State	Issuer
1205150794	Medicaid	CA	-

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 → Validate an NPI →

Frequently asked questions

What specialty is Matthew Williams?

Matthew Williams is registered in NPPES with the primary taxonomy of Psychologist. 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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Daniel Lettenberger-Klein Marriage & Family Therapist · Marietta, GA NPI 1770851529 Jessica Milne Behavior Analyst · Marietta, GA NPI 1811398993 Farida Scriber Addiction (Substance Use Disorder) Counselor · Marietta, GA NPI 1669985966 David Hopkins Professional Counselor · Marietta, GA NPI 1578078184 Paula Sinisterra Mental Health Counselor · Marietta, GA NPI 1861979643 Terah Sampler Professional Counselor · Marietta, GA NPI 1215505896 Megan Kraner Clinical Social Worker · Marietta, GA NPI 1821819699 Tasha Lyle Behavior Technician · Marietta, GA NPI 1548082464

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-11-30.