David J. Westrich Jr., MD

Medicare activity in 2024

Official CMS public-use data for David J. Westrich Jr., 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. Biopsy of large bowel using a flexible endoscope (45380)62 services
2. Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)50 services
3. Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)45 services
4. Test for tone and sensation of rectum and anus (91120)30 services
5. Study of rectum sensitivity and function (91122)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 pressure73%
• High cholesterol67%
• Arthritis49%
• Depression37%
• Anxiety37%
• Diabetes33%

Hospitals where David J. Westrich Jr. works

Medicare's Facility Affiliation Data lists David J. Westrich Jr. 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.

• SSM Health Saint Louis University HospitalSaint Louis, MO · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 260105
• SSM St Joseph Health CenterSaint Charles, MO · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 260005
• SSM St Joseph Hospital WestLake Saint Louis, MO · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 260200

Practice locations

Addresses where David J. Westrich Jr. is enrolled with Medicare (CMS data updated October 2, 2026).

• 400 1st Capitol Dr, Suite 201Saint Charles, MO 63301 (636) 669‑2332

Group practices

Medicare enrollment lists David J. Westrich Jr. as a member of this group (CMS data updated October 2, 2026).

• SSM Medical Group Inc568 clinicians in the group

Specialties

• Gastroenterologyprimary

Find other Gastroenterology doctors in Missouri →

Other gastroenterologists in Saint Charles

Clinicians with the same Medicare primary specialty in Saint Charles, MO — not a recommendation.

• Hari H. Diwakaran, MD
• Richard A. Geisman, MD
• Marin Marcu, MD

All gastroenterologists in Saint Charles →

Other clinicians in SSM Medical Group Inc

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

• James G. Glauber, MD
• Anne M. Maestas, DPM
• Andrew B. Kichura, MD
• Michael P. Hemmersmeier, DO
• Patrick B. McDonough, MD
• Charles R. Hartman Jr., 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