Quick answers
- Does Michael J. Jennewein accept Medicare assignment?
- Yes. Medicare's clinician data says Michael J. Jennewein 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 Michael J. Jennewein see?
- In 2024, CMS data shows 3,043 Original Medicare patients and 3,783 services for Michael J. Jennewein. This counts Original Medicare only and measures volume, not quality.
- What is Michael J. Jennewein's NPI number?
- 1548288145. 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 Michael J. Jennewein, 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 | 3,043 |
|---|---|
| Services billed to Medicare | 3,783 |
| Different services or procedures | 132 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- X-ray of chest, 2 views (71046)912 services
- X-ray of chest, 1 view (71045)587 services
- Ct scan head or brain without contrast (70450)145 services
- X-ray of abdomen, 1 view (74018)138 services
- Mri scan of leg joint without contrast (73721)117 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%
- Arthritis68%
- Ischemic heart disease40%
- Diabetes38%
- Anxiety33%
Hospitals where Michael J. Jennewein works
Medicare's Facility Affiliation Data lists Michael J. Jennewein 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
- Hopedale HospitalHopedale, IL · Critical Access Hospital · Emergency services: listed by Medicare · CCN 141330
- Memorial HospitalBelleville, IL · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 140185
- Washington County Memorial HospitalPotosi, MO · Critical Access Hospital · Emergency services: listed by Medicare · CCN 261308
Practice locations
Addresses where Michael J. Jennewein is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 6; the Medicare profile lists all.
- 100 Medical DrHannibal, MO 63401 (573) 221‑5250
- 300 Health Way DrPotosi, MO 63664 (573) 438‑5451
- 3050 Montvale Dr, Suite ASpringfield, IL 62704 (217) 726‑8096
- 3512 August Tavern Creek RdWildwood, MO 63038 (217) 726‑8096
- 4500 Memorial DrBelleville, IL 62226 (314) 747‑1171
Group practices
Medicare enrollment lists Michael J. Jennewein as a member of these groups (CMS data updated October 2, 2026).
- Washington University Physicians in Illinois Inc175 clinicians in the group
- Clinical Radiologists SC29 clinicians in the group
Specialties
- Diagnostic Radiologyprimary
Other radiologists in Hannibal
Clinicians with the same Medicare primary specialty in Hannibal, MO — not a recommendation.
Other clinicians in Washington University Physicians in Illinois Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1991 (35 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1548288145 |
| 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