Tammy L. Sonn, MD

Medicare activity in 2024

Official CMS public-use data for Tammy L. Sonn, 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. Cervical or vaginal cancer screening; pelvic and clinical breast examination (G0101)16 services
2. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)12 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 cholesterol51%
• High blood pressure49%
• Arthritis40%
• Anxiety34%
• Depression31%

Hospitals where Tammy L. Sonn works

Medicare's Facility Affiliation Data lists Tammy L. Sonn 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
• Mercy Hospital St LouisSaint Louis, MO · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 260020
• 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 Tammy L. Sonn is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 6; the Medicare profile lists all.

• 1 Barnes Jew Hosp PlzSaint Louis, MO 63110 (314) 747‑3000
• 4901 Forest Park AveSaint Louis, MO 63108
• 4901 Forest Park Ave, Suite 710Saint Louis, MO 63108 (314) 362‑7135
• 5201 Mid America PlzSaint Louis, MO 63129 (314) 286‑0099
• 660 S Euclid AveSt Louis, MO 63110

Group practices

Medicare enrollment lists Tammy L. Sonn as a member of this group (CMS data updated October 2, 2026).

• Washington University3,029 clinicians in the group

Specialties

• Obstetrics/Gynecologyprimary

Find other Obstetrics/Gynecology doctors in Missouri →

Other OB-GYNs in Saint Louis

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

• Deborah Levy, MD
• Micaela E. Oneil Callahan, MD
• Heather M. Campbell, MD
• Laura L. Pignotti, MD
• Sara Larue, DO
• Jill K. Powell, MD
• Raksha Soora, MD
• Donald H. Lange, MD

All OB-GYNs in Saint Louis →

Other clinicians in Washington University

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

• Emily F. Mandernach
• Krystal L. Panagiotaros
• Lukas H. Matern, MD
• Maxim Wolfson, MD
• Tiffany M. Osborn, MD
• Adnan Al Najada, 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