William Callahan
NPI 1649136193 · Addiction (Substance Use Disorder) Counselor · Plymouth, MA
William Callahan is a Addiction (Substance Use Disorder) Counselor provider in Plymouth, MA (NPI 1649136193).
Provider details
- NPI number
- 1649136193
- Entity type
- Individual
- Primary specialty
- Addiction (Substance Use Disorder) CounselorBehavioral Health & Social Service Providers
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
Under 1 yr in 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
Mailing address
Registry dates
- Enumerated
- 2025-12-29
- Last updated
- 2025-12-29
- Certified
- 2025-12-29
Frequently asked questions
- What is William Callahan's NPI number?
- William Callahan's National Provider Identifier (NPI) is 1649136193, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Callahan's specialty?
- William Callahan is listed in the NPPES registry with a primary specialty of Addiction (Substance Use Disorder) Counselor (Behavioral Health & Social Service Providers).
- Where is William Callahan located?
- William Callahan's practice location on file with NPPES is 61 Industrial Park Rd, Plymouth, MA 02360-7246.
- What is William Callahan's phone number?
- The practice phone number listed in the NPPES registry for William Callahan is (508) 689-5576.
- Is William Callahan's NPI active?
- Yes — William Callahan's NPI (1649136193) is active in the NPPES registry as of the last update on 2025-12-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.