Kenneth S. Nitahara, MD

Medicare activity in 2024

Official CMS public-use data for Kenneth S. Nitahara, 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. Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more (99212)18 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 pressure73%
• High cholesterol73%

Hospitals where Kenneth S. Nitahara works

Medicare's Facility Affiliation Data lists Kenneth S. Nitahara 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.

• Kaiser Foundation Hospital - San DiegoSan Diego, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050515
• Kaiser Foundation Hospital - San MarcosSan Marcos, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050855

Practice locations

Addresses where Kenneth S. Nitahara is enrolled with Medicare (CMS data updated October 2, 2026).

• 360 Rush DrSan Marcos, CA 92078 (833) 574‑2273
• 4647 Zion AveSan Diego, CA 92120 (619) 528‑5000
• 5893 Copley DrSan Diego, CA 92111 (858) 616‑5499

Group practices

Medicare enrollment lists Kenneth S. Nitahara as a member of this group (CMS data updated October 2, 2026).

• Southern California Permanente Medical Group11,293 clinicians in the group

Specialties

• Urologyprimary

Find other Urology doctors in California →

Other urologists in San Marcos

Clinicians with the same Medicare primary specialty in San Marcos, CA — not a recommendation.

• Jeffrey S. Gaines, MD
• Brandon K. Isariyawongse, MD
• Philip H. Kim, MD
• Ryan A. Chandhoke, MD
• Vincent J. Flynn, MD
• Rami Jirjis, MD
• Mitra R. De Cogain, MD
• George W. Middleton, MD

All urologists in San Marcos →

Other clinicians in Southern California Permanente Medical Group

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

• Nina S. Willis, DO
• William Chen, MD
• Yen Phan, DO
• Soyoung McFarland
• Kevin Wu, MD
• Gina H. Wong, PT

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