Matthew R. Mohorek, MD

Medicare activity in 2024

Official CMS public-use data for Matthew R. Mohorek, 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. Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)42 services
2. Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)39 services
3. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)35 services
4. Biopsy of large bowel using a flexible endoscope (45380)31 services
5. New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)30 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 cholesterol75%
• Arthritis44%
• Ischemic heart disease33%
• Anxiety32%
• Chronic kidney disease31%

Hospitals where Matthew R. Mohorek works

Medicare's Facility Affiliation Data lists Matthew R. Mohorek 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.

• Ascension SE Wisconsin HospitalMilwaukee, WI · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 520136
• Oconomowoc Memorial HospitalOconomowoc, WI · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 520062
• Waukesha Memorial HospitalWaukesha, WI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 520008

Practice locations

Addresses where Matthew R. Mohorek is enrolled with Medicare (CMS data updated October 2, 2026).

• 1033 N Mayfair Rd, Suite 101Wauwatosa, WI 53226 (414) 454‑0600
• 1111 Delafield St, Suite 321Waukesha, WI 53188 (414) 454‑0600
• 2801 W Kinnickinnic River Pkwy, Suite 1080Milwaukee, WI 53215 (414) 908‑6500

Group practices

Medicare enrollment lists Matthew R. Mohorek as a member of these groups (CMS data updated October 2, 2026).

• Gi Associates LLC55 clinicians in the group
• Gastroenterology Specialists SC30 clinicians in the group
• Milwaukee Gi Specialists SC15 clinicians in the group

Specialties

• Gastroenterologyprimary

Find other Gastroenterology doctors in Wisconsin →

Other gastroenterologists in Wauwatosa

Clinicians with the same Medicare primary specialty in Wauwatosa, WI — not a recommendation.

• Mario J. Velez, MD
• Aaron C. Baltz, MD
• Adam F. Van Huis, MD
• David A. Carron, MD
• Helen H. Lantz, MD
• Nathaniel T. Jest, DO
• Erica A. Samuel
• William Blosky, MD

All gastroenterologists in Wauwatosa →

Other clinicians in Gi Associates LLC

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

• Nicole M. Griglione, MD
• Mario J. Velez, MD
• Alison M. Baierl
• Katie J. Balderas
• Aravind S. Vijayapal, MD
• Erica A. Samuel

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