Katherine Nielsen
NPI 1598129249 · Pediatrics Physician · Torrance, CA
Enrolled with Medicare as Practitioner - Pediatric Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Katherine Nielsen is a Pediatrics Physician provider in Torrance, CA (NPI 1598129249).
Provider details
- NPI number
- 1598129249
- Entity type
- Individual
- Primary specialty
- Pediatrics PhysicianAllopathic & Osteopathic Physicians
- Sex
- Female
- Sole proprietor
- No
- License
- A150744 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
10 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.
$94 across 4 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
- 2016-04-08
- Last updated
- 2019-09-27
Frequently asked questions
- What is Katherine Nielsen's NPI number?
- Katherine Nielsen's National Provider Identifier (NPI) is 1598129249, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Katherine Nielsen's specialty?
- Katherine Nielsen is listed in the NPPES registry with a primary specialty of Pediatrics Physician (Allopathic & Osteopathic Physicians).
- Where is Katherine Nielsen located?
- Katherine Nielsen's practice location on file with NPPES is 1000 W Carson St, Torrance, CA 90502-2004.
- What is Katherine Nielsen's phone number?
- The practice phone number listed in the NPPES registry for Katherine Nielsen is (310) 222-2343.
- Does Katherine Nielsen accept Medicare?
- Katherine Nielsen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Katherine Nielsen's NPI active?
- Yes — Katherine Nielsen's NPI (1598129249) is active in the NPPES registry as of the last update on 2019-09-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.