IndividualActive
William Diaz
NPI 1811464266 · Counselor · Boston, MA
William Diaz is a Counselor provider in Boston, MA (NPI 1811464266).
Provider details
- NPI number
- 1811464266
- Entity type
- Individual
- Primary specialty
- CounselorBehavioral Health & Social Service Providers
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
Established profile(61/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
7 yrs 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
39 Boylston Street
Boston, MA 02116
Phone: (617) 654-1218
Street-level locationGet directions
Mailing address
39 Boylston St
Boston, MA 02116-4702
Registry dates
- Enumerated
- 2018-10-24
- Last updated
- 2018-10-24
Frequently asked questions
- What is William Diaz's NPI number?
- William Diaz's National Provider Identifier (NPI) is 1811464266, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Diaz's specialty?
- William Diaz is listed in the NPPES registry with a primary specialty of Counselor (Behavioral Health & Social Service Providers).
- Where is William Diaz located?
- William Diaz's practice location on file with NPPES is 39 Boylston Street, Boston, MA 02116.
- What is William Diaz's phone number?
- The practice phone number listed in the NPPES registry for William Diaz is (617) 654-1218.
- Is William Diaz's NPI active?
- Yes — William Diaz's NPI (1811464266) is active in the NPPES registry as of the last update on 2018-10-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.