Andrew T. Kowalski, DO

Medicare activity in 2024

Official CMS public-use data for Andrew T. 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. New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)48 services
2. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)33 services
3. Biopsy of large bowel using a flexible endoscope (45380)30 services
4. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)23 services
5. Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk (G0121)21 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 pressure75%
• High cholesterol73%
• Arthritis36%
• Diabetes31%
• COPD26%
• Ischemic heart disease23%

Hospitals where Andrew T. Kowalski works

Medicare's Facility Affiliation Data lists Andrew T. 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.

• Grays Harbor Community HospitalAberdeen, WA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 500031
• Summit Pacific Medical CenterElma, WA · Critical Access Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 501304

Practice locations

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

• 1006 N H StAberdeen, WA 98520 (360) 537‑6496

Group practices

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

• GHCH Physician Services, LLC12 clinicians in the group

Specialties

• General Surgeryprimary

Find other General Surgery doctors in Washington →

Other general surgeons in Aberdeen

Clinicians with the same Medicare primary specialty in Aberdeen, WA — not a recommendation.

• Alvin Trieu, MD
• Bradley Neuman, MD
• Brent J. Rowe, MD
• Jonathan H. Gifford, MD

All general surgeons in Aberdeen →

Other clinicians in GHCH Physician Services, LLC

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

• Charles D. Best, MD
• Mark Scholl, MD
• Alvin Trieu, MD
• David H. Freidenberg, MD
• Marjorie J. Nunez, NP
• Gregory May, 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