Owen K. Nishikawa, MD

Medicare activity in 2024

Official CMS public-use data for Owen 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 moderate level of decision making, if using time, 30 minutes or more (99214)485 services
2. Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)206 services
3. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)113 services
4. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)73 services
5. Transitional care management services for problem of at least moderate complexity (99495)29 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%
• Diabetes31%
• Chronic kidney disease31%
• Osteoporosis30%
• Arthritis27%

Hospitals where Owen K. Nishikawa works

Medicare's Facility Affiliation Data lists Owen 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.

• Kapiolani Medical Center for Women & ChildrenHonolulu, HI · Children's Hospital · Emergency services: listed by Medicare · CCN 123300
• Kuakini Medical CenterHonolulu, HI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 120007
• Pali Momi Medical CenterAiea, HI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 120026
• Straub Clinic and HospitalHonolulu, HI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 120022
• The Queens Medical CenterHonolulu, HI · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 120001

Practice locations

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

• 321 N Kuakini St, Suite 304Honolulu, HI 96817 (808) 536‑5383

Specialties

• Family Practiceprimary

Find other Family Practice doctors in Hawaii →

Other family doctors in Honolulu

Clinicians with the same Medicare primary specialty in Honolulu, HI — not a recommendation.

• Johnnie Yates, MD
• Jesus Lucas, MD
• Randall Suzuka, MD
• Christine A. White, MD
• Melissa S. Gosland, MD
• Jessica A. Ono, MD
• Andrew K. Jun, MD
• Jenny M. Satterberg, MD

All family doctors in Honolulu →

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