John Marshall, SUDCC
NPI 1285394114 · Addiction (Substance Use Disorder) Counselor · San Diego, CA
John Marshall, SUDCC is a Addiction (Substance Use Disorder) Counselor provider in San Diego, CA (NPI 1285394114).
Provider details
- NPI number
- 1285394114
- Entity type
- Individual
- Primary specialty
- Addiction (Substance Use Disorder) CounselorBehavioral Health & Social Service Providers
- Credential
- SUDCC
- Sex
- Male
- Sole proprietor
- No
- License
- 12527 (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
4 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
- 2021-12-20
- Last updated
- 2025-02-26
- Certified
- 2025-02-26
Frequently asked questions
- What is John Marshall's NPI number?
- John Marshall's National Provider Identifier (NPI) is 1285394114, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Marshall's specialty?
- John Marshall is listed in the NPPES registry with a primary specialty of Addiction (Substance Use Disorder) Counselor (Behavioral Health & Social Service Providers).
- Where is John Marshall located?
- John Marshall's practice location on file with NPPES is 4065 3rd Ave, San Diego, CA 92103-2184.
- What is John Marshall's phone number?
- The practice phone number listed in the NPPES registry for John Marshall is (619) 515-2545.
- Is John Marshall's NPI active?
- Yes — John Marshall's NPI (1285394114) is active in the NPPES registry as of the last update on 2025-02-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.