Greg Leduc
NPI 1841406535 · Addiction (Substance Use Disorder) Counselor · Holyoke, MA
Greg Leduc is a Addiction (Substance Use Disorder) Counselor provider in Holyoke, MA (NPI 1841406535).
Provider details
- NPI number
- 1841406535
- Entity type
- Individual
- Primary specialty
- Addiction (Substance Use Disorder) CounselorBehavioral Health & Social Service Providers
- Sex
- Male
- Sole proprietor
- Yes
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
19 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
Mailing address
Registry dates
- Enumerated
- 2007-05-16
- Last updated
- 2007-07-08
Frequently asked questions
- What is Greg Leduc's NPI number?
- Greg Leduc's National Provider Identifier (NPI) is 1841406535, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Greg Leduc's specialty?
- Greg Leduc is listed in the NPPES registry with a primary specialty of Addiction (Substance Use Disorder) Counselor (Behavioral Health & Social Service Providers).
- Where is Greg Leduc located?
- Greg Leduc's practice location on file with NPPES is 1233 Main St, Holyoke, MA 01040-5381.
- What is Greg Leduc's phone number?
- The practice phone number listed in the NPPES registry for Greg Leduc is (413) 539-2487.
- Is Greg Leduc's NPI active?
- Yes — Greg Leduc's NPI (1841406535) 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.