Diana Lessley, RADT
NPI 1689337933 · Addiction (Substance Use Disorder) Counselor · Napa, CA
Diana Lessley, RADT is a Addiction (Substance Use Disorder) Counselor provider in Napa, CA (NPI 1689337933).
Provider details
- NPI number
- 1689337933
- Entity type
- Individual
- Primary specialty
- Addiction (Substance Use Disorder) CounselorBehavioral Health & Social Service Providers
- Credential
- RADT
- Sex
- Female
- Sole proprietor
- Yes
- License
- R1420550221 (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
4 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
- 2021-10-14
- Last updated
- 2021-10-14
- Certified
- 2021-10-13
Frequently asked questions
- What is Diana Lessley's NPI number?
- Diana Lessley's National Provider Identifier (NPI) is 1689337933, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Diana Lessley's specialty?
- Diana Lessley is listed in the NPPES registry with a primary specialty of Addiction (Substance Use Disorder) Counselor (Behavioral Health & Social Service Providers).
- Where is Diana Lessley located?
- Diana Lessley's practice location on file with NPPES is 2751 Napa Valley Corporate Dr, Napa, CA 94558-6216.
- What is Diana Lessley's phone number?
- The practice phone number listed in the NPPES registry for Diana Lessley is (707) 704-8299.
- Is Diana Lessley's NPI active?
- Yes — Diana Lessley's NPI (1689337933) is active in the NPPES registry as of the last update on 2021-10-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.