Ruthann Markusen
NPI 1083821920 · Addiction (Substance Use Disorder) Counselor · Culver City, CA
Ruthann Markusen is a Addiction (Substance Use Disorder) Counselor provider in Culver City, CA (NPI 1083821920).
Provider details
- NPI number
- 1083821920
- Entity type
- Individual
- Primary specialty
- Addiction (Substance Use Disorder) CounselorBehavioral Health & Social Service Providers
- Sex
- Female
- Sole proprietor
- No
- License
- CADCII A2001605 (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
19 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
- 2007-05-17
- Last updated
- 2014-12-30
Frequently asked questions
- What is Ruthann Markusen's NPI number?
- Ruthann Markusen's National Provider Identifier (NPI) is 1083821920, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ruthann Markusen's specialty?
- Ruthann Markusen is listed in the NPPES registry with a primary specialty of Addiction (Substance Use Disorder) Counselor (Behavioral Health & Social Service Providers).
- Where is Ruthann Markusen located?
- Ruthann Markusen's practice location on file with NPPES is 11133 Washington Blvd, Culver City, CA 90232-3918.
- What is Ruthann Markusen's phone number?
- The practice phone number listed in the NPPES registry for Ruthann Markusen is (310) 895-2343.
- Is Ruthann Markusen's NPI active?
- Yes — Ruthann Markusen's NPI (1083821920) is active in the NPPES registry as of the last update on 2014-12-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.