Mari Nakashizuka, MD

Medicare activity in 2024

Official CMS public-use data for Mari Nakashizuka, 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 high level of medical decision making, if using time, 40 minutes or more (99215)96 services
2. Partial removal of breast (19301)59 services
3. Ultrasonic guidance during surgery (76998)55 services
4. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)43 services
5. New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)38 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%
• Osteoporosis36%
• Diabetes35%
• Arthritis35%

Hospitals where Mari Nakashizuka works

Medicare's Facility Affiliation Data lists Mari Nakashizuka 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
• 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 Mari Nakashizuka is enrolled with Medicare (CMS data updated October 2, 2026).

• 321 N Kuakini St, Suite 614Honolulu, HI 96817 (808) 533‑1676

Specialties

• Undefined Physician Type (Specify)primary

Find other Undefined Physician Type (Specify) doctors in Hawaii →

Other physicians in Honolulu

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

• Ian A. Oyama, MD
• Pai-Jong Stacy Tsai, MD
• Jaikaran Man Singh, MD
• Dena R. Towner, MD
• Benjamin D. Tabak, MD
• Danny M. Takanishi, MD
• Tony Trpkovski, MD
• Karen A. Soules, MD

All physicians 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