Mark Workman, CADC-II
NPI 1407709454 · Addiction (Substance Use Disorder) Counselor · Oak View, CA
Mark Workman, CADC-II is a Addiction (Substance Use Disorder) Counselor provider in Oak View, CA (NPI 1407709454).
Provider details
- NPI number
- 1407709454
- Entity type
- Individual
- Primary specialty
- Addiction (Substance Use Disorder) CounselorBehavioral Health & Social Service Providers
- Credential
- CADC-II
- Sex
- Male
- Sole proprietor
- Yes
- License
- A053681218 (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
Under 1 yr in 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
- 2026-02-18
- Last updated
- 2026-02-18
- Certified
- 2026-02-18
Frequently asked questions
- What is Mark Workman's NPI number?
- Mark Workman's National Provider Identifier (NPI) is 1407709454, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Workman's specialty?
- Mark Workman is listed in the NPPES registry with a primary specialty of Addiction (Substance Use Disorder) Counselor (Behavioral Health & Social Service Providers).
- Where is Mark Workman located?
- Mark Workman's practice location on file with NPPES is 158 Rockaway Rd, Oak View, CA 93022-9306.
- What is Mark Workman's phone number?
- The practice phone number listed in the NPPES registry for Mark Workman is (805) 273-8798.
- Is Mark Workman's NPI active?
- Yes — Mark Workman's NPI (1407709454) is active in the NPPES registry as of the last update on 2026-02-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.