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William Haddad, PHD
NPI 1578772430 · Clinical Psychologist · Worcester, MA
William Haddad, PHD is a Clinical Psychologist provider in Worcester, MA (NPI 1578772430).
Provider details
- NPI number
- 1578772430
- Entity type
- Individual
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Credential
- PHD
- Sex
- Male
- Sole proprietor
- No
- License
- 7119 (MA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
Detailed profile(89/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% 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
340 Main St
Worcester, MA 01608-1604
Phone: (508) 926-0070
Street-level locationGet directions
Mailing address
203 Delmont Ave
Worcester, MA 01604-3205
Registry dates
- Enumerated
- 2007-05-21
- Last updated
- 2007-07-08
Frequently asked questions
- What is William Haddad's NPI number?
- William Haddad's National Provider Identifier (NPI) is 1578772430, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Haddad's specialty?
- William Haddad is listed in the NPPES registry with a primary specialty of Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is William Haddad located?
- William Haddad's practice location on file with NPPES is 340 Main St, Worcester, MA 01608-1604.
- What is William Haddad's phone number?
- The practice phone number listed in the NPPES registry for William Haddad is (508) 926-0070.
- Is William Haddad's NPI active?
- Yes — William Haddad's NPI (1578772430) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.