NPI age
16 years
Enumerated 2010-03-26
● Active
Type 1 · Individual
MR. Matthew Benjamin Williams, PH.D.
Williams is 1 of 57 psychologist providers in Marietta and 1 of 1114 in Georgia.
Primary specialty
Psychologist
Plus 1 subspecialty
Licensed in
GA, CA
2 states
Status
Active
No deactivations on record
Last NPPES update
2021-11-30
Source: monthly bulk 2026-05
Sole proprietor
No
May be part of a larger org
How this provider compares
Across 1114 active psychologist providers in Georgia.
NPI age
16 years
≈ at median (17 yr)
State licenses
2 states
Top 95% — 4% of peers are multi-state
Subspecialties
0
16% of peers hold subspecialties
NPI lifetime · 2010 → 2026
2010-03Enumerated in NPPES
2010
2026
Where they practice
Practice location
1640 Powers Ferry Rd Se Ste 100
Marietta, GA 300675491
Mailing address
1640 Powers Ferry Rd Se Ste 100
Marietta, GA 300675491
Specialties
-
Psychologist PrimaryA psychologist is an individual who is licensed to practice psychology which is defined as the observation, description, evaluation, interpretation, and modification of human behavior by the application of psychological principles,...
Identifiers
| Type | Value | Notes |
|---|---|---|
| 05 (CA) | 1205150794 |
Multi-state credentialing: Licensed in 2 states. Useful context for credentialers building cross-state provider networks.
Practice context
Part of a multi-provider practice. 39 other active providers share this practice address in NPPES.
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- Confirm the NPI on NPPES.The CMS registry is the system of record. Open NPPES →
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