What is Gregory Williams's NPI number?

Gregory Williams's National Provider Identifier (NPI) is 1518852565, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Gregory Williams's specialty?

Gregory Williams is listed in the NPPES registry with a primary specialty of Mental Health Counselor (Behavioral Health & Social Service Providers).

Where is Gregory Williams located?

Gregory Williams's practice location on file with NPPES is 504 Dudley St, Roxbury, MA 02119-2732.

What is Gregory Williams's phone number?

The practice phone number listed in the NPPES registry for Gregory Williams is (617) 445-6655.

Is Gregory Williams's NPI active?

Yes — Gregory Williams's NPI (1518852565) is active in the NPPES registry as of the last update on 2025-06-10.

IndividualActive

Gregory Williams

NPI 1518852565 · Mental Health Counselor · Roxbury, MA

Gregory Williams is a Mental Health Counselor provider in Roxbury, MA (NPI 1518852565).

Provider details

NPI number: 1518852565
Entity type: Individual
Primary specialty: Mental Health CounselorBehavioral Health & Social Service Providers
Sex: Male
Sole proprietor: No

Specialties & taxonomies

Mental Health CounselorPrimary101YM0800X
Behavioral Health & Social Service Providers

Profile Score

Basic profile(48/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure38% of score
1 yr in NPPES registry
Profile completeness38% of score
83% of core fields populated
Practice footprint23% of score
1 documented practice location

Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.

Practice location

504 Dudley St

Roxbury, MA 02119-2732

Phone: (617) 445-6655

Street-level locationGet directions

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Mailing address