Leonard Houlker
NPI 1588068613 · Addiction (Substance Use Disorder) Counselor · Lancaster, CA
Leonard Houlker is a Addiction (Substance Use Disorder) Counselor provider in Lancaster, CA (NPI 1588068613).
Provider details
- NPI number
- 1588068613
- Entity type
- Individual
- Primary specialty
- Addiction (Substance Use Disorder) CounselorBehavioral Health & Social Service Providers
- Sex
- Male
- Sole proprietor
- Yes
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
11 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
- 2014-10-17
- Last updated
- 2014-10-17
Frequently asked questions
- What is Leonard Houlker's NPI number?
- Leonard Houlker's National Provider Identifier (NPI) is 1588068613, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Leonard Houlker's specialty?
- Leonard Houlker is listed in the NPPES registry with a primary specialty of Addiction (Substance Use Disorder) Counselor (Behavioral Health & Social Service Providers).
- Where is Leonard Houlker located?
- Leonard Houlker's practice location on file with NPPES is 44900 60th St W, Lancaster, CA 93536-7618.
- What is Leonard Houlker's phone number?
- The practice phone number listed in the NPPES registry for Leonard Houlker is (661) 945-8458.
- Is Leonard Houlker's NPI active?
- Yes — Leonard Houlker's NPI (1588068613) is active in the NPPES registry as of the last update on 2014-10-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.