Quick answers
- Does Onyekachi Nwabuko accept Medicare assignment?
- Yes. Medicare's clinician data says Onyekachi Nwabuko 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 Onyekachi Nwabuko see?
- In 2024, CMS data shows 114 Original Medicare patients and 139 services for Onyekachi Nwabuko. This counts Original Medicare only and measures volume, not quality.
- What is Onyekachi Nwabuko's NPI number?
- 1366636235. 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 Onyekachi Nwabuko, 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 | 114 |
|---|---|
| Services billed to Medicare | 139 |
| Different services or procedures | 9 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Emergency department visit with high level of medical decision making (99285)45 services
- Emergency department visit with moderate level of medical decision making (99284)43 services
- Critical care, first 30-74 minutes (99291)23 services
- Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)12 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%
- Arthritis49%
- Ischemic heart disease49%
- Anxiety42%
- Diabetes35%
Hospitals where Onyekachi Nwabuko works
Medicare's Facility Affiliation Data lists Onyekachi Nwabuko 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.
- Clay County HospitalFlora, IL · Critical Access Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 141351
- Memorial HospitalCarthage, IL · Critical Access Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 141305
- Perry County Memorial HospitalTell City, IN · Critical Access Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 151322
- Salem Township HospitalSalem, IL · Critical Access Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 141345
- Sarah D Culbertson Memorial HospitalRushville, IL · Critical Access Hospital · Emergency services: listed by Medicare · CCN 141333
Practice locations
Addresses where Onyekachi Nwabuko is enrolled with Medicare (CMS data updated October 2, 2026).
- 238 S Congress StRushville, IL 62681 (217) 322‑5296
- 300 Health Way DrPotosi, MO 63664 (573) 438‑5451
- 8885 State Rd, Suite 237Tell City, IN 47586 (812) 547‑3447
Group practices
Medicare enrollment lists Onyekachi Nwabuko as a member of these groups (CMS data updated October 2, 2026).
- Concord Company of Tennessee PLLC71 clinicians in the group
- Schuyler County Hospital District45 clinicians in the group
- Potosi Emergency Group, LLC19 clinicians in the group
Specialties
- Emergency Medicineprimary
- Family Practicealso
Other emergency medicine doctors in Illinois
Clinicians with the same Medicare primary specialty in Illinois — not a recommendation.
Other clinicians in Concord Company of Tennessee PLLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2005 (21 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1366636235 |
| 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