Mark Grieshaber, MFT
NPI 1548550122 · Marriage & Family Therapist · Los Angeles, CA
Mark Grieshaber, MFT is a Marriage & Family Therapist provider in Los Angeles, CA (NPI 1548550122).
Provider details
- NPI number
- 1548550122
- Entity type
- Individual
- Primary specialty
- Marriage & Family TherapistBehavioral Health & Social Service Providers
- Credential
- MFT
- Sex
- Male
- Sole proprietor
- No
- License
- MFC36016 (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
15 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
- 2011-04-15
- Last updated
- 2011-04-15
Frequently asked questions
- What is Mark Grieshaber's NPI number?
- Mark Grieshaber's National Provider Identifier (NPI) is 1548550122, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Grieshaber's specialty?
- Mark Grieshaber is listed in the NPPES registry with a primary specialty of Marriage & Family Therapist (Behavioral Health & Social Service Providers).
- Where is Mark Grieshaber located?
- Mark Grieshaber's practice location on file with NPPES is 10379 W Pico Blvd, Los Angeles, CA 90064-2608.
- What is Mark Grieshaber's phone number?
- The practice phone number listed in the NPPES registry for Mark Grieshaber is (310) 785-9456.
- Is Mark Grieshaber's NPI active?
- Yes — Mark Grieshaber's NPI (1548550122) is active in the NPPES registry as of the last update on 2011-04-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.