Antonio Carlos A. Westphalen, MD

Medicare activity in 2024

Official CMS public-use data for Antonio Carlos A. Westphalen, 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.

Most frequent services

1. Ct scan of abdomen and pelvis with contrast (74177)375 services
2. Mri scan of pelvis before and after contrast (72197)171 services
3. X-ray of abdomen, 1 view (74018)157 services
4. 3d radiographic procedure with computerized image postprocessing (76377)117 services
5. Mri scan of abdomen before and after contrast (74183)79 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 pressure67%
• High cholesterol60%
• Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)37%
• Arthritis35%
• Chronic kidney disease29%
• Diabetes25%

Hospitals where Antonio Carlos A. Westphalen works

Medicare's Facility Affiliation Data lists Antonio Carlos A. Westphalen at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.

• Harborview Medical CenterSeattle, WA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 500064
• Swedish Medical CenterSeattle, WA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 500027
• University of Washington Medical CenterSeattle, WA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: not listed by Medicare · CCN 500008

Practice locations

Addresses where Antonio Carlos A. Westphalen is enrolled with Medicare (CMS data updated October 2, 2026).

• 24360 Van Ry Blvd, Suite 111Mountlake Terrace, WA 98043 (206) 598‑9091

Group practices

Medicare enrollment lists Antonio Carlos A. Westphalen as a member of this group (CMS data updated October 2, 2026).

• The Association of University Physicians3,535 clinicians in the group

Specialties

• Diagnostic Radiologyprimary

Find other Diagnostic Radiology doctors in Washington →

Other radiologists in Washington

Clinicians with the same Medicare primary specialty in Washington — not a recommendation.

• Claire K. Sandstrom, MD
• Sarah J. Foster, MD
• Michelle Tran, DO
• Matthew T. Studley, MD
• Robert Brezak, MD
• Mark J. Roggeveen, MD
• Leah N. Kiviat, MD
• Carlton F. Roos, MD

All radiologists in Washington →

Other clinicians in The Association of University Physicians

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

• Kwang Hoon Han, MD
• Amy Lu, MD
• Hannah J. Weaver, MD
• Jeanne M. Hoffman, CP
• Jason E. Legan, PA
• Terrence T. Jones, MD

Clinician information

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

1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
6. Medicare Care Compare — official Medicare tool to look up clinicians