Cole K. Nishikawa, MD

Medicare activity in 2024

Official CMS public-use data for Cole K. Nishikawa, 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 low level od decision making, if using time, 20 minutes or more (99213)145 services
2. Use of a drug to induce depression of consciousness by physician performing a procedure, each additional 15 minutes (99153)78 services
3. Ultrasound of hemodialysis access (93990)71 services
4. Use of a drug to induce depression of consciousness by physician performing a procedure (5 years or older), initial 15 minutes (99152)65 services
5. Ultrasound of leg arteries or artery grafts (93925)57 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%
• Chronic kidney disease75%
• Diabetes71%
• Ischemic heart disease53%
• Heart failure45%

Hospitals where Cole K. Nishikawa works

Medicare's Facility Affiliation Data lists Cole K. Nishikawa 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.

• NorthBay Medical CenterFairfield, CA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 050367

Practice locations

Addresses where Cole K. Nishikawa is enrolled with Medicare (CMS data updated October 2, 2026).

• 1860 Pennsylvania Ave, Suite 120Fairfield, CA 94533 (707) 646‑4400
• 3288 Moanalua RdHonolulu, HI 96819 (808) 432‑0000

Group practices

Medicare enrollment lists Cole K. Nishikawa as a member of these groups (CMS data updated October 2, 2026).

• Hawaii Permanente Medical Group Inc704 clinicians in the group
• NorthBay Physicians Surgery Center, LLC324 clinicians in the group

Specialties

• Vascular Surgeryprimary

Find other Vascular Surgery doctors in California →

Other vascular surgeons in California

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

• Michael L. Ginsberg, MD
• Warren J. Gasper, MD
• Gerald R. Sydorak, MD
• Jeffrey S. Weiss, MD
• Yanyu Long, MD
• Steven M. Farley, MD
• Venkat R. Yalamanchili, MD
• Adam C. Ring, MD

All vascular surgeons in California →

Other clinicians in Hawaii Permanente Medical Group Inc

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

• Karen I. Ching, MD
• Misti L. Blandford, PA
• Li-Hsieh Chen
• Andrew T. Nguyen, MD
• Nicole M. Mau, MD
• Vuong M. Uong, 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