Kathryn M. Diemer, MD

Medicare activity in 2024

Official CMS public-use data for Kathryn M. Diemer, 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. Injection, denosumab, 1 mg (J0897)13,680 services
2. Injection, romosozumab-aqqg, 1 mg (J3111)8,190 services
3. Dxa bone density measurement of hip, pelvis, spine (77080)1,489 services
4. Calculation of trabecular bone score (tbs) using imaging data with interpretation and report on fracture risk (77089)1,103 services
5. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)482 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).

• Osteoporosis75%
• High cholesterol68%
• High blood pressure57%
• Arthritis52%
• Anxiety26%
• Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)23%

Hospitals where Kathryn M. Diemer works

Medicare's Facility Affiliation Data lists Kathryn M. Diemer 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.

• Barnes Jewish HospitalSaint Louis, MO · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 260032
• Barnes-Jewish St Peters HospitalSaint Peters, MO · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 260191
• Barnes-Jewish West County HospitalCreve Coeur, MO · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 260162
• Memorial HospitalBelleville, IL · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 140185
• Missouri Baptist Medical CenterSaint Louis, MO · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 260108

Practice locations

Addresses where Kathryn M. Diemer is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 8; the Medicare profile lists all.

• 1 Barnes Jew Hosp PlzSaint Louis, MO 63110 (314) 747‑3000
• 10 Barnes W DrSaint Louis, MO 63141
• 10 Barnes W Dr, 200 Asthma and Allergy Center Wash UnivSt Louis, MO 63141 (314) 996‑8670
• 4500 Forest Park AveSaint Louis, MO 63108
• 4921 Parkview PlSaint Louis, MO 63110

Group practices

Medicare enrollment lists Kathryn M. Diemer as a member of these groups (CMS data updated October 2, 2026).

• Washington University3,029 clinicians in the group
• Aging Well Health Care, LLC238 clinicians in the group

Specialties

• Internal Medicineprimary

Find other Internal Medicine doctors in Missouri →

Other internal medicine doctors in Saint Louis

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

• Adam D. Littich, MD
• Yolanda Bledsoe, MD
• Timothy J. McCann, MD
• Francis G. Wade Iii, MD
• Sunny D. Desai, MD
• Isam S. Hawatmeh, MD
• Saad Alkaade, MD
• Dina Elsayed, MD

All internal medicine doctors in Saint Louis →

Other clinicians in Washington University

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

• Susan M. Lin, MD
• Satvik R. Hadigal, MD
• Bree A. Goodman, MD
• Adam D. Littich, MD
• Bradley J. Girod, MD
• Rugheed Ghadban, 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