Mark Fieldson, M.F.T.
NPI 1225196454 · Marriage & Family Therapist · Los Alamitos, CA
Mark Fieldson, M.F.T. is a Marriage & Family Therapist provider in Los Alamitos, CA (NPI 1225196454).
Provider details
- NPI number
- 1225196454
- Entity type
- Individual
- Primary specialty
- Marriage & Family TherapistBehavioral Health & Social Service Providers
- Credential
- M.F.T.
- Sex
- Male
- Sole proprietor
- Yes
- License
- MFC25467 (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
19 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
- 2006-12-04
- Last updated
- 2007-07-08
Frequently asked questions
- What is Mark Fieldson's NPI number?
- Mark Fieldson's National Provider Identifier (NPI) is 1225196454, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Fieldson's specialty?
- Mark Fieldson is listed in the NPPES registry with a primary specialty of Marriage & Family Therapist (Behavioral Health & Social Service Providers).
- Where is Mark Fieldson located?
- Mark Fieldson's practice location on file with NPPES is 4132 Katella Ave, Los Alamitos, CA 90720-3426.
- What is Mark Fieldson's phone number?
- The practice phone number listed in the NPPES registry for Mark Fieldson is (562) 754-3005.
- Is Mark Fieldson's NPI active?
- Yes — Mark Fieldson's NPI (1225196454) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.