James K. Regan, MD

Medicare activity in 2024

Official CMS public-use data for James K. Regan, 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. Pathology examination of tissue using a microscope, intermediate complexity (88305)88 services
2. Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)48 services
3. Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)42 services
4. Biopsy of large bowel using a flexible endoscope (45380)39 services
5. New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)22 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 pressure68%
• High cholesterol68%
• Arthritis38%
• Diabetes29%
• Depression28%
• Anxiety28%

Hospitals where James K. Regan works

Medicare's Facility Affiliation Data lists James K. Regan 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.

• Providence Hood River Memorial HospitalHood River, OR · Critical Access Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 381318
• Providence Milwaukie HospitalMilwaukie, OR · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: not listed by Medicare · CCN 380082
• Providence Portland Medical CenterPortland, OR · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 380061

Practice locations

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

• 1111 NE 99th AvePortland, OR 97220
• 4805 NE GlisanPortland, OR 97213
• 5050 NE Hoyt, Suite 655Portland, OR 97213 (503) 239‑6673
• 9300 SE 91st Ave, Suite 300Happy Valley, OR 97086 (503) 963‑2707
• 9701 SW Barnes, Suite 300Portland, OR 97225 (503) 297‑8081

Group practices

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

• The Oregon Clinic, PC362 clinicians in the group

Specialties

• Gastroenterologyprimary

Find other Gastroenterology doctors in Oregon →

Other gastroenterologists in Portland

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

• Nima Motamedi, MD
• Seth Crockett, MD
• Amy Wang, MD
• Sarah J. Diamond, MD
• Margot L. Herman, MD
• Emily Jonica, MD
• Anne H. Wang, MD
• Saad F. Jazrawi, MD

All gastroenterologists in Portland →

Other clinicians in The Oregon Clinic, PC

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

• Claire Boenisch, PA
• Lauren M. Rynders, AU
• Heather A. Zarour, MD
• Ryan N. Best, MD
• Kimberley J. Scott, PA
• Hetal K. Fichadia, 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