Williamson Le
NPI 1487231247 · Internal Medicine Physician · San Rafael, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Williamson Le is a Internal Medicine Physician provider in San Rafael, CA (NPI 1487231247).
Provider details
- NPI number
- 1487231247
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Sex
- Male
- Sole proprietor
- No
- License
- A193437 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
5 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 · 21 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 79 | 29 |
| Amlodipine Besylate | 49 | 18 |
| Lisinopril | 39 | 14 |
| Metoprolol Tartrate | 35 | 13 |
| Gabapentin | 33 | 13 |
| Losartan Potassium | 29 | 14 |
| Albuterol Sulfate |
Practice location
Mailing address
Registry dates
- Enumerated
- 2021-03-26
- Last updated
- 2024-07-03
- Certified
- 2024-07-03
Frequently asked questions
- What is Williamson Le's NPI number?
- Williamson Le's National Provider Identifier (NPI) is 1487231247, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Williamson Le's specialty?
- Williamson Le is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Williamson Le located?
- Williamson Le's practice location on file with NPPES is 99 Montecillo Rd, San Rafael, CA 94903-3308.
- What is Williamson Le's phone number?
- The practice phone number listed in the NPPES registry for Williamson Le is (415) 444-2000.
- Does Williamson Le accept Medicare?
- Williamson Le is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Williamson Le's NPI active?
- Yes — Williamson Le's NPI (1487231247) is active in the NPPES registry as of the last update on 2024-07-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.