Quick answers
- Does Osler Jay J. Guzon accept Medicare assignment?
- Yes. Medicare's clinician data says Osler Jay J. Guzon accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Osler Jay J. Guzon see?
- In 2024, CMS data shows 757 Original Medicare patients and 1,717 services for Osler Jay J. Guzon. This counts Original Medicare only and measures volume, not quality.
- What is Osler Jay J. Guzon's NPI number?
- 1285683888. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Osler Jay J. Guzon, 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.
| Original Medicare patients | 757 |
|---|---|
| Services billed to Medicare | 1,717 |
| Different services or procedures | 62 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)394 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)357 services
- Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)104 services
- Exercise or drug-induced heart stress test with electrocardiogram (ecg) with supervision by physician (93016)99 services
- Exercise or drug-induced heart stress test with electrocardiogram (ecg) with review by physician (93018)98 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%
- Heart failure56%
- Ischemic heart disease55%
- Chronic kidney disease49%
- Arthritis48%
Hospitals where Osler Jay J. Guzon works
Medicare's Facility Affiliation Data lists Osler Jay J. Guzon 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.
- Alton Memorial HospitalAlton, IL · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 140002
- Barnes Jewish HospitalSaint Louis, MO · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 260032
- Barnes-Jewish West County HospitalCreve Coeur, MO · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 260162
- Cox Medical CentersSpringfield, MO · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 260040
- Memorial HospitalBelleville, IL · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 140185
Practice locations
Addresses where Osler Jay J. Guzon is enrolled with Medicare (CMS data updated October 2, 2026).
- 1020 N Mason Rd, Suite 210Creve Coeur, MO 63141 (314) 996‑3162
- 5201 Mid America Plz, Suite 2300Saint Louis, MO 63129 (314) 362‑5365
Group practices
Medicare enrollment lists Osler Jay J. Guzon as a member of these groups (CMS data updated October 2, 2026).
- Washington University3,029 clinicians in the group
- Heart Care Institute LLC18 clinicians in the group
Specialties
Find other Cardiovascular Disease (Cardiology) doctors in Missouri →
Other cardiologists in Missouri
Clinicians with the same Medicare primary specialty in Missouri — not a recommendation.
Other clinicians in Washington University
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Missouri, Kansas City, School Of Medicine |
| Graduation year | 2001 (25 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1285683888 |
| Corrections | Report an error or suggest an update → |
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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians