Sonia Okuyama Sasaki, MD

Medicare activity in 2024

Official CMS public-use data for Sonia Okuyama Sasaki, 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)47 services
2. Telephone medical discussion with physician, 21-30 minutes (99443)41 services
3. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)34 services
4. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)28 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 pressure53%
• Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)53%
• High cholesterol33%
• Diabetes32%
• Arthritis28%
• COPD21%

Hospitals where Sonia Okuyama Sasaki works

Medicare's Facility Affiliation Data lists Sonia Okuyama Sasaki 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.

• Denver Health & Hospital AuthorityDenver, CO · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 060011
• Saint Joseph HospitalDenver, CO · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 060028

Practice locations

Addresses where Sonia Okuyama Sasaki is enrolled with Medicare (CMS data updated October 2, 2026).

• 777 Bannock StDenver, CO 80204 (303) 436‑6000

Group practices

Medicare enrollment lists Sonia Okuyama Sasaki as a member of this group (CMS data updated October 2, 2026).

• Denver Health and Hospital Authority849 clinicians in the group

Specialties

• Hematology/Oncologyprimary
• Internal Medicinealso

Find other Hematology/Oncology doctors in Colorado →

Other hematologist-oncologists in Denver

Clinicians with the same Medicare primary specialty in Denver, CO — not a recommendation.

• Lala Cornelius, MD
• Richard Nash, MD
• Karen E. Kogel, MD
• Vignesh Narayanan, MD
• Rao R. Mushtaq, MD
• Susan M. Freeman, MD
• Jeffrey V. Matous, MD
• Heather West, MD

All hematologist-oncologists in Denver →

Other clinicians in Denver Health and Hospital Authority

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

• Pavlina P. Gust, PA
• Thomas M. Dunn
• Emili N. Pickenpaugh
• David F. Benson, CNA
• Katherine S. Rosen, NP
• Mariam S. Ahmad, 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