Jeffrey Siegel, MD
NPI 1366590234 · Internal Medicine Physician · Los Angeles, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jeffrey Siegel, MD is a Internal Medicine Physician provider in Los Angeles, CA (NPI 1366590234).
Provider details
- NPI number
- 1366590234
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- G80444 (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 · 113 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 729 | 253 |
| Amlodipine Besylate | 606 | 218 |
| Lisinopril | 364 | 122 |
| Rosuvastatin Calcium | 299 | 110 |
| Simvastatin | 269 | 81 |
| Losartan Potassium | 266 | 92 |
| Metformin Hcl | 225 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-01-08
- Last updated
- 2021-11-22
Frequently asked questions
- What is Jeffrey Siegel's NPI number?
- Jeffrey Siegel's National Provider Identifier (NPI) is 1366590234, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jeffrey Siegel's specialty?
- Jeffrey Siegel is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Jeffrey Siegel located?
- Jeffrey Siegel's practice location on file with NPPES is 6041 Cadillac Ave, Los Angeles, CA 90034-1702.
- What is Jeffrey Siegel's phone number?
- The practice phone number listed in the NPPES registry for Jeffrey Siegel is (323) 857-2000.
- Does Jeffrey Siegel accept Medicare?
- Jeffrey Siegel is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jeffrey Siegel's NPI active?
- Yes — Jeffrey Siegel's NPI (1366590234) is active in the NPPES registry as of the last update on 2021-11-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.