Quick answers
- Does William D. Boswell Jr. accept Medicare assignment?
- Yes. Medicare's clinician data says William D. Boswell Jr. 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 William D. Boswell Jr. see?
- In 2024, CMS data shows 484 Original Medicare patients and 1,589 services for William D. Boswell Jr.. This counts Original Medicare only and measures volume, not quality.
- What is William D. Boswell Jr.'s NPI number?
- 1548209612. 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 William D. Boswell Jr., 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 | 484 |
|---|---|
| Services billed to Medicare | 1,589 |
| Different services or procedures | 8 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Ct scan of chest with contrast (71260)684 services
- Ct scan of abdomen and pelvis before and after contrast (74178)444 services
- Ct scan of abdomen and pelvis with contrast (74177)230 services
- Ct scan of abdomen and pelvis without contrast (74176)107 services
- Ct scan of chest without contrast (71250)106 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 blood pressure75%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)75%
- High cholesterol73%
- Chronic kidney disease42%
- Arthritis39%
- Ischemic heart disease39%
Practice locations
Addresses where William D. Boswell Jr. is enrolled with Medicare (CMS data updated October 2, 2026).
- 1000 FivepointIrvine, CA 92618 (949) 671‑4673
- 1500 Duarte RdDuarte, CA 91010 (626) 256‑4673
- 1500 E Duarte RdDuarte, CA 91010
- 209 Fair Oaks AveSouth Pasadena, CA 91030 (626) 396‑2900
Group practices
Medicare enrollment lists William D. Boswell Jr. as a member of this group (CMS data updated October 2, 2026).
- City of Hope Medical Foundation982 clinicians in the group
Specialties
- Diagnostic Radiologyprimary
Other radiologists in Irvine
Clinicians with the same Medicare primary specialty in Irvine, CA — not a recommendation.
Other clinicians in City of Hope Medical Foundation
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Jefferson Medical College Of Thomas Jefferson University |
| Graduation year | 1972 (54 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1548209612 |
| 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