Katharine Borthwick
NPI 1841634094 · Internal Medicine Physician · Los Angeles, CA
Enrolled with Medicare as Order and Referring Only - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Katharine Borthwick is a Internal Medicine Physician provider in Los Angeles, CA (NPI 1841634094).
Provider details
- NPI number
- 1841634094
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Sex
- Female
- Sole proprietor
- Yes
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
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
83% 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
- 2013-04-18
- Last updated
- 2017-08-21
Frequently asked questions
- What is Katharine Borthwick's NPI number?
- Katharine Borthwick's National Provider Identifier (NPI) is 1841634094, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Katharine Borthwick's specialty?
- Katharine Borthwick is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Katharine Borthwick located?
- Katharine Borthwick's practice location on file with NPPES is 757 Westwood Plz, Los Angeles, CA 90095-8358.
- What is Katharine Borthwick's phone number?
- The practice phone number listed in the NPPES registry for Katharine Borthwick is (310) 825-7375.
- Does Katharine Borthwick accept Medicare?
- Katharine Borthwick is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Katharine Borthwick's NPI active?
- Yes — Katharine Borthwick's NPI (1841634094) is active in the NPPES registry as of the last update on 2017-08-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.