Oscar L. Llanos Ulloa, MD

Medicare activity in 2024

Official CMS public-use data for Oscar L. Llanos Ulloa, 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. Critical care, first 30-74 minutes (99291)239 services
2. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)111 services
3. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)88 services
4. Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)60 services
5. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)39 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 cholesterol65%
• COPD57%
• Arthritis53%
• Anxiety45%
• Heart failure45%

Hospitals where Oscar L. Llanos Ulloa works

Medicare's Facility Affiliation Data lists Oscar L. Llanos Ulloa 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.

• Boone Hospital CenterColumbia, MO · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 260068
• University of Missouri Health CareColumbia, MO · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 260141

Practice locations

Addresses where Oscar L. Llanos Ulloa is enrolled with Medicare (CMS data updated October 2, 2026).

• 1 Hospital DrColumbia, MO 65212 (573) 882‑4141
• 404 N Keene StColumbia, MO 65201 (573) 875‑9000

Group practices

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

• The Curators of the University of Missouri1,131 clinicians in the group

Specialties

• Critical Care (Intensivists)primary
• Pulmonary Diseasealso

Find other Critical Care (Intensivists) doctors in Missouri →

Other critical care doctors in Columbia

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

• Francisco E. Gomez Iii, MD
• Mark A. Reed, MD
• Salman Ahmad, MD
• Satish Kalanjeri Balasubramanian, MD
• Rodger E. Wilhite, DO
• Yuji Oba, MD
• Tinashe Maduke, MD
• Raymond Okeke, MD

All critical care doctors in Columbia →

Other clinicians in The Curators of the University of Missouri

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

• Peter J. Koopman, MD
• Tina L. Kile
• Hilary A. Elom, MD
• Catherine A. Roche
• Stephanie N. Robinson, CNA
• William P. Fay, 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