Ky Nam B. Nguyen, MD

Medicare activity in 2024

Official CMS public-use data for Ky Nam B. Nguyen, 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 guidance for insertion of radiation therapy fields (77014)1,494 services
2. Calculation of radiation therapy dose (77300)358 services
3. Radiation treatment management, 5 treatment sessions (77427)321 services
4. Design and construction of complex radiation treatment device (77334)211 services
5. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)198 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%
• High cholesterol75%
• Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)75%
• Arthritis47%
• Diabetes38%
• Ischemic heart disease34%

Hospitals where Ky Nam B. Nguyen works

Medicare's Facility Affiliation Data lists Ky Nam B. Nguyen 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.

• Adventist Health and RideoutMarysville, CA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 050133
• Oroville HospitalOroville, CA · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 050030
• University of California Davis Medical CenterSacramento, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050599

Practice locations

Addresses where Ky Nam B. Nguyen is enrolled with Medicare (CMS data updated October 2, 2026).

• 618 5th StMarysville, CA 95901 (530) 749‑4400

Group practices

Medicare enrollment lists Ky Nam B. Nguyen as a member of this group (CMS data updated October 2, 2026).

• Regents of the University of California567 clinicians in the group

Specialties

• Radiation Oncologyprimary

Find other Radiation Oncology doctors in California →

Other radiation oncologists in California

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

• Alison Bevan, MD
• Kevin Lin, MD
• Beth K. Neilsen, MD
• Sri G. Gorty, MD
• Faisal Ahmed, MD
• Soheila Azghadi, MD
• Michael S. Binkley, MD
• Jerry D. Slater, MD

All radiation oncologists in California →

Other clinicians in Regents of the University of California

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

• Christina R. Muirhead-Zamora, CSW
• Lily Park, DO
• Vimala T. Reddy, MD
• Steven J. Sylvester, PT
• Dale W. Woolley, PT
• Francisco Farias, 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