Mariela Costello, PSY.D.
NPI 1801145727 · Clinical Psychologist · Los Altos, CA
Mariela Costello, PSY.D. is a Clinical Psychologist provider in Los Altos, CA (NPI 1801145727).
Provider details
- NPI number
- 1801145727
- Entity type
- Individual
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Credential
- PSY.D.
- Sex
- Female
- Sole proprietor
- Yes
- License
- PSY23277 (CA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
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
13 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
- 2012-09-06
- Last updated
- 2018-10-02
Frequently asked questions
- What is Mariela Costello's NPI number?
- Mariela Costello's National Provider Identifier (NPI) is 1801145727, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mariela Costello's specialty?
- Mariela Costello is listed in the NPPES registry with a primary specialty of Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is Mariela Costello located?
- Mariela Costello's practice location on file with NPPES is 919 Fremont Ave, Los Altos, CA 95020.
- What is Mariela Costello's phone number?
- The practice phone number listed in the NPPES registry for Mariela Costello is (408) 220-3268.
- Is Mariela Costello's NPI active?
- Yes — Mariela Costello's NPI (1801145727) is active in the NPPES registry as of the last update on 2018-10-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.