Carol Nishikubo, MD

Medicare activity in 2024

Official CMS public-use data for Carol Nishikubo, 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. Injection, denosumab, 1 mg (J0897)13,740 services
2. Injection, aprepitant, 1 mg (J0185)6,240 services
3. Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count (85025)1,177 services
4. Insertion of needle into vein for collection of blood sample (36415)889 services
5. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)797 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 cholesterol75%
• Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)66%
• High blood pressure63%
• Arthritis50%
• Osteoporosis36%
• Ischemic heart disease31%

Hospitals where Carol Nishikubo works

Medicare's Facility Affiliation Data lists Carol Nishikubo 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.

• Saint John's Health CenterSanta Monica, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050290

Practice locations

Addresses where Carol Nishikubo is enrolled with Medicare (CMS data updated October 2, 2026).

• 12555 W Jefferson BlvdLos Angeles, CA 90066
• 2001 Santa Monica Blvd, Suite 560wSanta Monica, CA 90404 (310) 453‑5654
• 2121 Santa Monica BlvdSanta Monica, CA 90404 (310) 829‑5511
• 2336 Santa Monica Blvd, Suite 204Santa Monica, CA 90404 (310) 829‑6789

Group practices

Medicare enrollment lists Carol Nishikubo as a member of this group (CMS data updated October 2, 2026).

• Providence Saint Johns Medical Foundation281 clinicians in the group

Specialties

• Hematology/Oncologyprimary

Find other Hematology/Oncology doctors in California →

Other hematologist-oncologists in Los Angeles

Clinicians with the same Medicare primary specialty in Los Angeles, CA — not a recommendation.

• Clan H. Hahn, MD
• John M. Timmerman, MD
• Taras Benzar, MD
• Timothy S. Kristedja, MD
• Nikita V. Baclig, MD
• Noah C. Federman, MD
• Sophie Carlson, MD
• Michael O. Shodiya, MD

All hematologist-oncologists in Los Angeles →

Other clinicians in Providence Saint Johns Medical Foundation

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

• Tracey R. Childs, MD
• Stanley A. Hubbard, MD
• Jennifer A. Scidmore, PA
• Walcharee C. Mahamitra, DO
• Rose H. Lin, MD
• Amit Kochhar, 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