Mark Sandlin, MA
NPI 1255832697 · Marriage & Family Therapist · San Dimas, CA
Mark Sandlin, MA is a Marriage & Family Therapist provider in San Dimas, CA (NPI 1255832697).
Provider details
- NPI number
- 1255832697
- Entity type
- Individual
- Primary specialty
- Marriage & Family TherapistBehavioral Health & Social Service Providers
- Credential
- MA
- Sex
- Male
- Sole proprietor
- Yes
- License
- 91727 (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
8 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
- 2018-02-21
- Last updated
- 2018-02-21
Frequently asked questions
- What is Mark Sandlin's NPI number?
- Mark Sandlin's National Provider Identifier (NPI) is 1255832697, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Sandlin's specialty?
- Mark Sandlin is listed in the NPPES registry with a primary specialty of Marriage & Family Therapist (Behavioral Health & Social Service Providers).
- Where is Mark Sandlin located?
- Mark Sandlin's practice location on file with NPPES is 1111 W Covina Blvd, San Dimas, CA 91773-3205.
- What is Mark Sandlin's phone number?
- The practice phone number listed in the NPPES registry for Mark Sandlin is (626) 771-7567.
- Is Mark Sandlin's NPI active?
- Yes — Mark Sandlin's NPI (1255832697) is active in the NPPES registry as of the last update on 2018-02-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.