William Leavitt, M.D.
NPI 1588774988 · Pediatrics Physician · Los Angeles, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Leavitt, M.D. is a Pediatrics Physician provider in Los Angeles, CA (NPI 1588774988).
Provider details
- NPI number
- 1588774988
- Entity type
- Individual
- Primary specialty
- Pediatrics PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- G059258 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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 · 25 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 57 | 21 |
| Atorvastatin Calcium | 51 | 22 |
| Losartan Potassium | 37 | 13 |
| Levothyroxine Sodium | 29 | 11 |
| Metformin Hcl | 28 | — |
| Tamsulosin Hcl | 25 | — |
| Omeprazole |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$205 across 3 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
- 2006-08-30
- Last updated
- 2025-09-11
Frequently asked questions
- What is William Leavitt's NPI number?
- William Leavitt's National Provider Identifier (NPI) is 1588774988, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Leavitt's specialty?
- William Leavitt is listed in the NPPES registry with a primary specialty of Pediatrics Physician (Allopathic & Osteopathic Physicians).
- Where is William Leavitt located?
- William Leavitt's practice location on file with NPPES is 849 W 34th St, Los Angeles, CA 90089-0311.
- What is William Leavitt's phone number?
- The practice phone number listed in the NPPES registry for William Leavitt is (213) 740-9355.
- Does William Leavitt accept Medicare?
- William Leavitt is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Leavitt's NPI active?
- Yes — William Leavitt's NPI (1588774988) is active in the NPPES registry as of the last update on 2025-09-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.