Giles Marsden
NPI 1336016864 · Addiction (Substance Use Disorder) Counselor · Los Angeles, CA
Giles Marsden is a Addiction (Substance Use Disorder) Counselor provider in Los Angeles, CA (NPI 1336016864).
Provider details
- NPI number
- 1336016864
- 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
Under 1 yr in 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
- 2025-10-20
- Last updated
- 2025-10-20
- Certified
- 2025-10-20
Frequently asked questions
- What is Giles Marsden's NPI number?
- Giles Marsden's National Provider Identifier (NPI) is 1336016864, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Giles Marsden's specialty?
- Giles Marsden is listed in the NPPES registry with a primary specialty of Addiction (Substance Use Disorder) Counselor (Behavioral Health & Social Service Providers).
- Where is Giles Marsden located?
- Giles Marsden's practice location on file with NPPES is 1919 N Beachwood Dr, Los Angeles, CA 90068-4006.
- What is Giles Marsden's phone number?
- The practice phone number listed in the NPPES registry for Giles Marsden is (323) 463-4266.
- Is Giles Marsden's NPI active?
- Yes — Giles Marsden's NPI (1336016864) is active in the NPPES registry as of the last update on 2025-10-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.