Hsiao Ou Hu, MD

Medicare activity in 2024

Official CMS public-use data for Hsiao Ou Hu, 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. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)992 services
2. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)613 services
3. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)55 services
4. New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)40 services
5. New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)32 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%
• Arthritis51%
• Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)49%
• Chronic kidney disease39%
• Ischemic heart disease33%

Hospitals where Hsiao Ou Hu works

Medicare's Facility Affiliation Data lists Hsiao Ou Hu 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.

• Mercy Hospital JeffersonCrystal City, MO · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 260023
• Mercy Hospital LincolnTroy, MO · Critical Access Hospital · Emergency services: listed by Medicare · CCN 261319
• Mercy Hospital SouthSaint Louis, MO · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 260077
• Mercy Hospital St LouisSaint Louis, MO · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 260020
• Mercy Hospital WashingtonWashington, MO · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 260052

Practice locations

Addresses where Hsiao Ou Hu is enrolled with Medicare (CMS data updated October 2, 2026).

• 607 S New Ballas RdSaint Louis, MO 63141 (314) 251‑4400
• 615 S New Ballas Rd 5th FloorSt Louis, MO 63141
• 901 Patients 1st DrWashington, MO 63090 (636) 390‑1600
• 901 Patients 1st Dr, Suite 1100Washington, MO 63090 (636) 390‑1600

Group practices

Medicare enrollment lists Hsiao Ou Hu as a member of this group (CMS data updated October 2, 2026).

• Mercy Clinic Oncology LLC33 clinicians in the group

Specialties

• Hematology/Oncologyprimary

Find other Hematology/Oncology doctors in Missouri →

Other hematologist-oncologists in Saint Louis

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

• Nada Al Masalmeh, MD
• Aleksandar M. Babic, MD
• John W. Finnie, MD
• Deepthi Busayavalasa, MD
• Jason J. Li, MD
• Ranju Kunwor, MD
• Shermini Saini, MD
• John M. Richart, MD

All hematologist-oncologists in Saint Louis →

Other clinicians in Mercy Clinic Oncology LLC

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

• John W. Finnie, MD
• Michelle E. Schwarz
• Bhaskara R. Gadi, MD
• Syed M. Hasan, MD
• Muhammad Mirza, MD
• Bethany Sleckman, 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