Mark Seymour
NPI 1770345308 · Addiction (Substance Use Disorder) Counselor · San Diego, CA
Mark Seymour is a Addiction (Substance Use Disorder) Counselor provider in San Diego, CA (NPI 1770345308).
Provider details
- NPI number
- 1770345308
- 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
2 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
- 2024-01-29
- Last updated
- 2024-01-29
- Certified
- 2024-01-29
Frequently asked questions
- What is Mark Seymour's NPI number?
- Mark Seymour's National Provider Identifier (NPI) is 1770345308, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Seymour's specialty?
- Mark Seymour is listed in the NPPES registry with a primary specialty of Addiction (Substance Use Disorder) Counselor (Behavioral Health & Social Service Providers).
- Where is Mark Seymour located?
- Mark Seymour's practice location on file with NPPES is 4141 Pacific Hwy, San Diego, CA 92110-2030.
- What is Mark Seymour's phone number?
- The practice phone number listed in the NPPES registry for Mark Seymour is (619) 393-2000.
- Is Mark Seymour's NPI active?
- Yes — Mark Seymour's NPI (1770345308) is active in the NPPES registry as of the last update on 2024-01-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.