Quick answers
- Does Winifred K. Leung accept Medicare assignment?
- Yes. Medicare's clinician data says Winifred K. Leung accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Winifred K. Leung see?
- In 2024, CMS data shows 2,764 Original Medicare patients and 18,805 services for Winifred K. Leung. This counts Original Medicare only and measures volume, not quality.
- What is Winifred K. Leung's NPI number?
- 1396797049. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Winifred K. Leung, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 2,764 |
|---|---|
| Services billed to Medicare | 18,805 |
| Different services or procedures | 25 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Injection, gadoterate meglumine, 0.1 ml (A9575)12,720 services
- Screening 3d breast mammography (77063)2,351 services
- Screening mammography (77067)2,351 services
- Complete ultrasound scan of 1 breast (76641)310 services
- Diagnostic digital breast tomosynthesis, unilateral or bilateral (list separately in addition to 77065 or 77066) (G0279)263 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High cholesterol72%
- High blood pressure49%
- Arthritis48%
- Osteoporosis31%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)21%
- Depression20%
Practice locations
Addresses where Winifred K. Leung is enrolled with Medicare (CMS data updated October 2, 2026).
- 540 W Pueblo StSantsa Barbara, CA 93105 (805) 681‑1761
Group practices
Medicare enrollment lists Winifred K. Leung as a member of this group (CMS data updated October 2, 2026).
- Sansum Clinic320 clinicians in the group
Specialties
- Diagnostic Radiologyprimary
Other radiologists in California
Clinicians with the same Medicare primary specialty in California — not a recommendation.
Other clinicians in Sansum Clinic
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2004 (22 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1396797049 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians