William Napp
NPI 1609333616 · Addiction (Substance Use Disorder) Counselor · Redding, CA
William Napp is a Addiction (Substance Use Disorder) Counselor provider in Redding, CA (NPI 1609333616).
Provider details
- NPI number
- 1609333616
- 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
7 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
- 2019-02-26
- Last updated
- 2019-02-26
Frequently asked questions
- What is William Napp's NPI number?
- William Napp's National Provider Identifier (NPI) is 1609333616, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Napp's specialty?
- William Napp is listed in the NPPES registry with a primary specialty of Addiction (Substance Use Disorder) Counselor (Behavioral Health & Social Service Providers).
- Where is William Napp located?
- William Napp's practice location on file with NPPES is 1145 Hartnell Ave, Redding, CA 96002-2113.
- What is William Napp's phone number?
- The practice phone number listed in the NPPES registry for William Napp is (661) 721-0463.
- Is William Napp's NPI active?
- Yes — William Napp's NPI (1609333616) is active in the NPPES registry as of the last update on 2019-02-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.