Alvin K. Nakamura, MD

Medicare activity in 2024

Official CMS public-use data for Alvin K. Nakamura, 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. Cervical or vaginal cancer screening; pelvic and clinical breast examination (G0101)24 services
2. Screening papanicolaou smear; obtaining, preparing and conveyance of cervical or vaginal smear to laboratory (Q0091)24 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 cholesterol55%
• High blood pressure39%

Hospitals where Alvin K. Nakamura works

Medicare's Facility Affiliation Data lists Alvin K. Nakamura 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.

• Adventist Health PortlandPortland, OR · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 380060

Practice locations

Addresses where Alvin K. Nakamura is enrolled with Medicare (CMS data updated October 2, 2026).

• 10000 SE Main St, Suite 248Portland, OR 97216 (503) 257‑7757
• 1810 E 19th StThe Dalles, OR 97058

Group practices

Medicare enrollment lists Alvin K. Nakamura as a member of this group (CMS data updated October 2, 2026).

• Mid-Columbia Medical Center94 clinicians in the group

Specialties

• Obstetrics/Gynecologyprimary

Find other Obstetrics/Gynecology doctors in Oregon →

Other OB-GYNs in Portland

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

• Darci J. Hansen, MD
• Nora M. Sang, MD
• Emily E. Griffin, MD
• Julie Friedman, MD
• Meredith K. Williams, MD
• Sally Holtzman, MD
• Shivani J. Patel, MD
• Kathleen F. Brookfield, MD

All OB-GYNs in Portland →

Other clinicians in Mid-Columbia Medical Center

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

• Winnifred M. Wong, DO
• Gregory C. Hoskins, MD
• Amy K. Forrest, DO
• Gretchen E. Blair, MD
• Sonia J. Schuemann, MD
• Raul A. Mirande, 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