Darren M. Kowalski, MD

Medicare activity in 2024

Official CMS public-use data for Darren M. Kowalski, 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. Ultrasound of both sides of head and neck blood flow (93880)215 services
2. Ultrasound study of one arm or leg veins with compression and maneuvers (93971)115 services
3. Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)64 services
4. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)58 services
5. Biopsy of large bowel using a flexible endoscope (45380)57 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 cholesterol75%
• High blood pressure65%
• Arthritis47%
• Ischemic heart disease38%
• Diabetes21%
• Depression20%

Hospitals where Darren M. Kowalski works

Medicare's Facility Affiliation Data lists Darren M. Kowalski 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.

• St Charles Medical Center - BendBend, OR · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 380047

Practice locations

Addresses where Darren M. Kowalski is enrolled with Medicare (CMS data updated October 2, 2026).

• 1501 NE Medical Ctr DrBend, OR 97701 (541) 382‑2811

Group practices

Medicare enrollment lists Darren M. Kowalski as a member of this group (CMS data updated October 2, 2026).

• Bend Memorial Clinic PC221 clinicians in the group

Specialties

• General Surgeryprimary

Find other General Surgery doctors in Oregon →

Other general surgeons in Bend

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

• Toshio Nagamoto, MD
• Nicholas J. Spoerke, MD
• Stephen B. Archer, MD
• Erin M. Walling, MD
• Michael J. Mastrangelo Jr., MD
• Vincent J. Santo Iii, MD
• Joshua Bleicher, MD
• Timothy L. Beard, MD

All general surgeons in Bend →

Other clinicians in Bend Memorial Clinic PC

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

• Cameron D. Mitchell, MD
• Anna M. Hancock, PA
• Emily Brenda, DO
• Andrew O. Jensen, DO
• Tammy A. Bull, MD
• Danielle A. Eigner, DO

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