Sean Leoni, M.D.
NPI 1669544052 · Internal Medicine Physician · Calabasas, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Sean Leoni, M.D. is a Internal Medicine Physician provider in Calabasas, CA (NPI 1669544052).
Provider details
- NPI number
- 1669544052
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- A53547 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
19 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- 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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 23 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Losartan Potassium | 42 | 18 |
| Amlodipine Besylate | 36 | 16 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 32 | — |
| Metoprolol Succinate | 31 | — |
| Tirzepatidebrand: Mounjaro | 25 | — |
| Metformin Hcl | 22 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$623 across 25 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
Registry dates
- Enumerated
- 2006-11-14
- Last updated
- 2023-03-07
Frequently asked questions
- What is Sean Leoni's NPI number?
- Sean Leoni's National Provider Identifier (NPI) is 1669544052, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sean Leoni's specialty?
- Sean Leoni is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Sean Leoni located?
- Sean Leoni's practice location on file with NPPES is 26500 Agoura Rd, Calabasas, CA 91302-1952.
- What is Sean Leoni's phone number?
- The practice phone number listed in the NPPES registry for Sean Leoni is (888) 254-6600.
- Does Sean Leoni accept Medicare?
- Sean Leoni is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Sean Leoni's NPI active?
- Yes — Sean Leoni's NPI (1669544052) is active in the NPPES registry as of the last update on 2023-03-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.