Katherine Duffy, M.D.
NPI 1881012433 · Family Medicine Physician · Los Angeles, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Katherine Duffy, M.D. is a Family Medicine Physician provider in Los Angeles, CA (NPI 1881012433).
Provider details
- NPI number
- 1881012433
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- A166886 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
12 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)
- 240 E. Huron StreetMcgaw Pavillion, Suite 1-200Chicago, IL 60611Phone: (312) 503-7975
Registry dates
- Enumerated
- 2014-04-01
- Last updated
- 2025-04-07
- Certified
- 2025-04-07
Frequently asked questions
- What is Katherine Duffy's NPI number?
- Katherine Duffy's National Provider Identifier (NPI) is 1881012433, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Katherine Duffy's specialty?
- Katherine Duffy is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Katherine Duffy located?
- Katherine Duffy's practice location on file with NPPES is 1625 Schrader Blvd, Los Angeles, CA 90028-6213.
- What is Katherine Duffy's phone number?
- The practice phone number listed in the NPPES registry for Katherine Duffy is (323) 993-7500.
- Does Katherine Duffy accept Medicare?
- Katherine Duffy is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Katherine Duffy's NPI active?
- Yes — Katherine Duffy's NPI (1881012433) is active in the NPPES registry as of the last update on 2025-04-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.