Karen Sierra, DDS
NPI 1619449915 · Dentist · Downey, CA
Karen Sierra, DDS is a Dentist provider in Downey, CA (NPI 1619449915).
Provider details
- NPI number
- 1619449915
- Entity type
- Individual
- Primary specialty
- DentistDental Providers
- Credential
- DDS
- Sex
- Female
- Sole proprietor
- No
- License
- 104221 (CA)
Specialties & taxonomies
Dental Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
7 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$54 across 3 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2018-12-26
- Last updated
- 2024-03-29
- Certified
- 2024-03-29
Frequently asked questions
- What is Karen Sierra's NPI number?
- Karen Sierra's National Provider Identifier (NPI) is 1619449915, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karen Sierra's specialty?
- Karen Sierra is listed in the NPPES registry with a primary specialty of Dentist (Dental Providers).
- Where is Karen Sierra located?
- Karen Sierra's practice location on file with NPPES is 7601 Imperial Hwy, Downey, CA 90242-3456.
- What is Karen Sierra's phone number?
- The practice phone number listed in the NPPES registry for Karen Sierra is (562) 401-7251.
- Is Karen Sierra's NPI active?
- Yes — Karen Sierra's NPI (1619449915) is active in the NPPES registry as of the last update on 2024-03-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.