Brent A. Kokubun, MD

Medicare activity in 2024

Official CMS public-use data for Brent A. Kokubun, 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, methylprednisolone acetate, 1 mg (J1010)1,364 services
2. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)468 services
3. X-ray of foot, minimum of 3 views (73630)208 services
4. X-ray of ankle, minimum of 3 views (73610)128 services
5. New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)97 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%
• Arthritis64%
• Diabetes34%
• Ischemic heart disease30%
• Osteoporosis26%

Hospitals where Brent A. Kokubun works

Medicare's Facility Affiliation Data lists Brent A. Kokubun 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.

• Casa Colina HospitalPomona, CA · Acute Care Hospital · Emergency services: not listed by Medicare · CCN 050782
• Huntington HospitalPasadena, CA · Acute Care Hospital · Emergency services: listed by Medicare · CCN 050438
• USC Arcadia HospitalArcadia, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 050238

Practice locations

Addresses where Brent A. Kokubun is enrolled with Medicare (CMS data updated October 2, 2026).

• 289 W Huntington Dr, Suite 304Arcadia, CA 91007 (626) 979‑2002

Group practices

Medicare enrollment lists Brent A. Kokubun as a member of this group (CMS data updated October 2, 2026).

• Cedars-Sinai Medical Care Foundation1,692 clinicians in the group

Specialties

• Orthopedic Surgeryprimary

Find other Orthopedic Surgery doctors in California →

Other orthopedic surgeons in Arcadia

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

• John T. Quigley, MD
• James O'Dowd, MD
• William M. Costigan, MD
• Jean Ding, MD
• Roy F. Ashford, MD
• Joe Lee, MD
• Kamran Movassaghi, MD
• Todd Dietrick, MD

All orthopedic surgeons in Arcadia →

Other clinicians in Cedars-Sinai Medical Care Foundation

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

• Alex T. Nguyen, MD
• Alexis K. Rieber, MD
• Tammy T. Nguyen, DO
• Katherine H. Zeigler, MD
• Christine H. Kim, MD
• Stephanie H. Han, 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