Katherine Fassihi, MD
NPI 1396893129 · Internal Medicine Physician · Los Angeles, CA
Enrolled with Medicare as Practitioner - Hospitalist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Katherine Fassihi, MD is a Internal Medicine Physician provider in Los Angeles, CA (NPI 1396893129).
Provider details
- NPI number
- 1396893129
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- A68023 (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
19 yrs in NPPES registry
- Profile completeness38% of score
100% 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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 11 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Omeprazole | 183 | 148 |
| Amlodipine Besylate | 38 | 17 |
| Insulin Lisprobrand: Humalog | 27 | — |
| Potassium Chloride | 24 | 16 |
| Scopolamine | 15 | 15 |
| Syringe-Needle,insulin,0.5 Mlbrand: Veo Insulin Syringe | 15 | — |
| Atorvastatin Calcium | 14 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-01-08
- Last updated
- 2021-11-29
Frequently asked questions
- What is Katherine Fassihi's NPI number?
- Katherine Fassihi's National Provider Identifier (NPI) is 1396893129, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Katherine Fassihi's specialty?
- Katherine Fassihi is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Katherine Fassihi located?
- Katherine Fassihi's practice location on file with NPPES is 6041 Cadillac Ave, Los Angeles, CA 90034-1702.
- What is Katherine Fassihi's phone number?
- The practice phone number listed in the NPPES registry for Katherine Fassihi is (323) 857-2000.
- Does Katherine Fassihi accept Medicare?
- Katherine Fassihi is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Katherine Fassihi's NPI active?
- Yes — Katherine Fassihi's NPI (1396893129) is active in the NPPES registry as of the last update on 2021-11-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.