Kristen Lefstein
NPI 1689176109 · Primary Care Nurse Practitioner · Orange, CA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Kristen Lefstein is a Primary Care Nurse Practitioner provider in Orange, CA (NPI 1689176109).
Provider details
- NPI number
- 1689176109
- Entity type
- Individual
- Primary specialty
- Primary Care Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Sex
- Female
- Sole proprietor
- No
- License
- 95007538 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
8 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
2 documented practice locations
- 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.
$163 across 5 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
Additional practice locations (1)
- 845 W La Veta Ave Ste 105Orange, CA 92868-3930Phone: (714) 289-6565Fax: (714) 289-6571
Registry dates
- Enumerated
- 2018-02-28
- Last updated
- 2026-01-13
- Certified
- 2026-01-13
Frequently asked questions
- What is Kristen Lefstein's NPI number?
- Kristen Lefstein's National Provider Identifier (NPI) is 1689176109, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Kristen Lefstein's specialty?
- Kristen Lefstein is listed in the NPPES registry with a primary specialty of Primary Care Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Kristen Lefstein located?
- Kristen Lefstein's practice location on file with NPPES is 1120 W La Veta Ave Ste 300, Orange, CA 92868-4246.
- What is Kristen Lefstein's phone number?
- The practice phone number listed in the NPPES registry for Kristen Lefstein is (714) 598-1745.
- Does Kristen Lefstein accept Medicare?
- Kristen Lefstein is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Kristen Lefstein's NPI active?
- Yes — Kristen Lefstein's NPI (1689176109) is active in the NPPES registry as of the last update on 2026-01-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.