John Kiernan
NPI 1821635426 · Addiction (Substance Use Disorder) Counselor · West Hollywood, CA
John Kiernan is a Addiction (Substance Use Disorder) Counselor provider in West Hollywood, CA (NPI 1821635426).
Provider details
- NPI number
- 1821635426
- 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
6 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
- 2019-12-03
- Last updated
- 2019-12-03
Frequently asked questions
- What is John Kiernan's NPI number?
- John Kiernan's National Provider Identifier (NPI) is 1821635426, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Kiernan's specialty?
- John Kiernan is listed in the NPPES registry with a primary specialty of Addiction (Substance Use Disorder) Counselor (Behavioral Health & Social Service Providers).
- Where is John Kiernan located?
- John Kiernan's practice location on file with NPPES is 8739 Santa Monica Blvd, West Hollywood, CA 90069-4507.
- What is John Kiernan's phone number?
- The practice phone number listed in the NPPES registry for John Kiernan is (310) 623-1477.
- Is John Kiernan's NPI active?
- Yes — John Kiernan's NPI (1821635426) is active in the NPPES registry as of the last update on 2019-12-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.