Cristina Sierra, LCSW
NPI 1831824333 · Clinical Social Worker · Pasadena, CA
Enrolled with Medicare as Practitioner - Clinical Social Worker · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Cristina Sierra, LCSW is a Clinical Social Worker provider in Pasadena, CA (NPI 1831824333).
Provider details
- NPI number
- 1831824333
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LCSW
- Sex
- Female
- Sole proprietor
- No
- License
- 127703 (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
3 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
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
Additional practice locations (1)
- 19713 Azure Field DrSanta Clarita, CA 91321-1346Phone: (818) 626-4532
Registry dates
- Enumerated
- 2022-07-19
- Last updated
- 2024-12-12
- Certified
- 2024-12-12
Frequently asked questions
- What is Cristina Sierra's NPI number?
- Cristina Sierra's National Provider Identifier (NPI) is 1831824333, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Cristina Sierra's specialty?
- Cristina Sierra is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Cristina Sierra located?
- Cristina Sierra's practice location on file with NPPES is 393 E Walnut St, Pasadena, CA 91188-0001.
- What is Cristina Sierra's phone number?
- The practice phone number listed in the NPPES registry for Cristina Sierra is (800) 854-7771.
- Does Cristina Sierra accept Medicare?
- Cristina Sierra is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Cristina Sierra's NPI active?
- Yes — Cristina Sierra's NPI (1831824333) is active in the NPPES registry as of the last update on 2024-12-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.