Williamson Le
- Part D claims, 2024
- 888
- Hospital affiliations
- 1
- Medical group
- 1
- Insurance carriers
- 2
- State licenses
- 2
- Practice address
- 99 Montecillo Rd, San Rafael, CA 94903
- Practice phone
- Call (415) 444-2000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Williamson Le's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Williamson Le is an internist in San Rafael, California
Williamson Le practices at San Rafael Medical Center in San Rafael, California, part of Kaiser Permanente.
Williamson Le's NPI, 1487231247, was assigned on March 26, 2021. Williamson Le graduated from Loma Linda University School Of Medicine in 2021. Williamson Le holds California license A193437.
- NPI
- 1487231247NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8022417005
- NPI enumeration date
- March 26, 2021
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (415) 444-2000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 31
- Medical school graduation
- 2021
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Williamson Le practices at San Rafael Medical Center in San Rafael, California
Williamson Le's primary practice is San Rafael Medical Center, at 99 Montecillo Rd, San Rafael, CA 94903 in Marin County. The practice phone is (415) 444-2000.
- San Rafael Medical Center99 Montecillo Rd, San Rafael, CA 94903 · Marin CountyPhone(415) 444-2000
Source: Dmand AI Affiliation Data
Williamson Le is affiliated with 1 site of care and 1 medical group
Williamson Le's primary practice is San Rafael Medical Center in San Rafael, California, part of Kaiser Permanente. The medical group on file is The Permanente Medical Group, Inc.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Williamson Le's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Williamson Le practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| San Rafael Medical Center | Available with a free account |
Source: Dmand AI Technology Install Data
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Williamson Le is one of 16,751 internists in California
Internal medicine is Williamson Le's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Williamson Le is board certified in internal medicine by the American Board of Internal Medicine. Dmand AI has Williamson Le's licenses on file in 2 states: California and Guam.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
- Guam license
Internists near Williamson Le
Counts of internists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Williamson Le's patients have a median age of 79
Across all payers, Dmand AI patient panel data puts Williamson Le's median patient age at 79, with 55% women.
Williamson Le's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 79
Patient panel by sex, all payers
- Women55%
- Men45%
Source: Dmand AI Patient Panel Data
Williamson Le wrote 888 Medicare Part D claims in 2024
In 2024, Williamson Le wrote 888 Medicare Part D claims for 228 patients. 87% of them were for generic drugs. CMS names the drug for 527 of them, across 21 drugs with 11 or more claims each, at $24,972 in total drug cost. In 2023, CMS named 88 claims across 5 drugs.
Williamson Le's Part D claims by kind of drug, 2024
- Generic774 claims87%
- Brand-name and other114 claims13%
Williamson Le's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Williamson Le's Part D claims, 2024
- Antibiotics5%48 of 888 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 882024: 527499%
Drugs named by CMS: 21 in 2024, 5 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Williamson Le takes part in Medicare
Williamson Le accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Williamson Le graduated from Loma Linda University School Of Medicine
Williamson Le graduated from Loma Linda University School Of Medicine in 2021.
- Medical school
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Williamson Le accepts plans from 2 insurance carriers
Williamson Le is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
- Kaiser Permanente
- CMS Medicare
Plan types Williamson Le accepts, by number of carriers
- EPO1
- HMO1
- Medicare1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Williamson Le's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Williamson Le
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Williamson Le's NPI number?
Williamson Le's NPI number is 1487231247. It was assigned on March 26, 2021, and it is active in the NPI Registry.
What does Williamson Le specialize in?
Williamson Le is an internist in San Rafael, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Williamson Le practice?
Williamson Le practices at 99 Montecillo Rd, San Rafael, CA 94903. Williamson Le's primary practice is San Rafael Medical Center in San Rafael, California, part of Kaiser Permanente.
What is Williamson Le's office phone number?
The practice phone on file for Williamson Le is (415) 444-2000.
What is Williamson Le's medical license number?
Williamson Le holds California license A193437, one of the licenses on file in 2 states.
Which states has Williamson Le been licensed in?
Dmand AI has state licenses on file for Williamson Le in California (2024 to 2026) and Guam.
Which hospitals is Williamson Le affiliated with?
Williamson Le practices at San Rafael Medical Center in San Rafael, California.
What medical group is Williamson Le part of?
Williamson Le is linked to The Permanente Medical Group, Inc.
Does Williamson Le accept Medicare?
Yes. CMS lists Williamson Le as accepting Medicare assignment.
Is Williamson Le board certified?
Yes. Williamson Le is board certified in internal medicine by the American Board of Internal Medicine.
Show 4 more questionsShow fewer questions
Where did Williamson Le go to medical school?
Williamson Le graduated from Loma Linda University School Of Medicine in 2021.
What drugs does Williamson Le prescribe most?
In 2024 Medicare Part D data, Williamson Le's most prescribed drugs by claims were Atorvastatin Calcium, Amlodipine Besylate and Lisinopril.
How long has Williamson Le been practicing?
Williamson Le graduated from medical school in 2021, 5 years ago.
What insurance does Williamson Le accept?
Williamson Le is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
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