Matthew Duffy, RADT
NPI 1922861897 · Addiction (Substance Use Disorder) Counselor · San Luis Obispo, CA
Matthew Duffy, RADT is a Addiction (Substance Use Disorder) Counselor provider in San Luis Obispo, CA (NPI 1922861897).
Provider details
- NPI number
- 1922861897
- Entity type
- Individual
- Primary specialty
- Addiction (Substance Use Disorder) CounselorBehavioral Health & Social Service Providers
- Credential
- RADT
- Sex
- Male
- Sole proprietor
- No
- License
- R1513820723 (CA)
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
2 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
Mailing address
Registry dates
- Enumerated
- 2024-02-02
- Last updated
- 2024-02-02
- Certified
- 2024-02-02
Frequently asked questions
- What is Matthew Duffy's NPI number?
- Matthew Duffy's National Provider Identifier (NPI) is 1922861897, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Matthew Duffy's specialty?
- Matthew Duffy is listed in the NPPES registry with a primary specialty of Addiction (Substance Use Disorder) Counselor (Behavioral Health & Social Service Providers).
- Where is Matthew Duffy located?
- Matthew Duffy's practice location on file with NPPES is 34 Prado, San Luis Obispo, CA 93401.
- What is Matthew Duffy's phone number?
- The practice phone number listed in the NPPES registry for Matthew Duffy is (805) 457-3331.
- Is Matthew Duffy's NPI active?
- Yes — Matthew Duffy's NPI (1922861897) is active in the NPPES registry as of the last update on 2024-02-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.