Quick answers
- Does Olufemi Abiodun accept Medicare assignment?
- Yes. Medicare's clinician data says Olufemi Abiodun 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 Olufemi Abiodun see?
- In 2024, CMS data shows 447 Original Medicare patients and 1,102 services for Olufemi Abiodun. This counts Original Medicare only and measures volume, not quality.
- What is Olufemi Abiodun's NPI number?
- 1821199464. 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 Olufemi Abiodun, 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 | 447 |
|---|---|
| Services billed to Medicare | 1,102 |
| Different services or procedures | 54 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)139 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)137 services
- Pathology examination of tissue using a microscope, intermediate complexity (88305)120 services
- Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)84 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)55 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%
- Arthritis55%
- Ischemic heart disease42%
- Chronic kidney disease39%
- Diabetes38%
Hospitals where Olufemi Abiodun works
Medicare's Facility Affiliation Data lists Olufemi Abiodun 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.
- Christian Hospital NortheastSaint Louis, MO · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 260180
- Memorial HospitalBelleville, IL · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 140185
- Palos Community HospitalPalos Heights, IL · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 140062
- Usmd Hospital at Arlington L PArlington, TX · Acute Care Hospital · Emergency services: listed by Medicare · CCN 450872
- UW HealthRockford, IL · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 140228
Practice locations
Addresses where Olufemi Abiodun is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 10; the Medicare profile lists all.
- 1 Memorial DrAlton, IL 62002 (618) 463‑7240
- 11155 Dunn Rd, Suite 309eSaint Louis, MO 63136 (314) 953‑8799
- 1401 E State StRockford, IL 61104 (815) 489‑4400
- 1404 Cross StShiloh, IL 62269 (618) 607‑3055
- 1404 Cross St, Suite 2940Shiloh, IL 62269 (618) 607‑3700
Group practices
Medicare enrollment lists Olufemi Abiodun as a member of these groups (CMS data updated October 2, 2026).
- Northwestern Medical Faculty Foundation4,503 clinicians in the group
- Fairview Heights Medical Group SC444 clinicians in the group
- Swedishamerican Hospital389 clinicians in the group
- Gastroenterology Practice Associates, PLLC6 clinicians in the group
Specialties
- Gastroenterologyprimary
- Internal Medicinealso
Other gastroenterologists in Alton
Clinicians with the same Medicare primary specialty in Alton, IL — not a recommendation.
Other clinicians in Northwestern Medical Faculty Foundation
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1995 (31 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1821199464 |
| 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