Onyekachi Ogbonna, MD

Medicare activity in 2024

Official CMS public-use data for Onyekachi Ogbonna, 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. Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)381 services
2. Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)227 services
3. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)161 services
4. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)37 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)35 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 pressure62%
• High cholesterol55%
• Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)48%
• Arthritis35%
• Chronic kidney disease31%
• Diabetes25%

Hospitals where Onyekachi Ogbonna works

Medicare's Facility Affiliation Data lists Onyekachi Ogbonna 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.

• Hillsboro Medical CenterHillsboro, OR · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 380021
• Legacy Good Samaritan Medical CenterPortland, OR · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 380017
• OHSU Hospital and ClinicsPortland, OR · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 380009

Practice locations

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

• 3181 SW Sam Jackson Park RdPortland, OR 97239 (503) 494‑8311

Group practices

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

• University Professional Services1,724 clinicians in the group

Specialties

• Hematology/Oncologyprimary

Find other Hematology/Oncology doctors in Oregon →

Other hematologist-oncologists in Portland

Clinicians with the same Medicare primary specialty in Portland, OR — not a recommendation.

• Regan M. Duffy, MD
• Aleksandra A. McLeod, MD
• Rui Li, MD
• Amrita Desai, MD
• Arpita P. Gandhi, MD
• Kenneth G. Bensch, MD
• Patan Gultawatvichai, MD
• Apurva Pandey, MD

All hematologist-oncologists in Portland →

Other clinicians in University Professional Services

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

• Atif Zaman, MD
• David German, MD
• Nathan Cutshall, MD
• Matthew Chan, MD
• Teri Greiling, MD
• Scott A. Collins, 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