Quick answers
- Does Oleksii Iakymenko accept Medicare assignment?
- Yes. Medicare's clinician data says Oleksii Iakymenko 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 Oleksii Iakymenko see?
- In 2024, CMS data shows 654 Original Medicare patients and 2,291 services for Oleksii Iakymenko. This counts Original Medicare only and measures volume, not quality.
- What is Oleksii Iakymenko's NPI number?
- 1598286353. 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 Oleksii Iakymenko, 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 | 654 |
|---|---|
| Services billed to Medicare | 2,291 |
| Different services or procedures | 27 |
| Participating Medicare provider | Yes |
| Average age of these patients | 72 |
Most frequent services
- Pathology examination of tissue using a microscope, intermediate complexity (88305)824 services
- Special stained specimen slides to examine tissue, each additional procedure (88341)288 services
- Microscopic genetic analysis of tumor, manual (88360)204 services
- Special stained specimen slides to examine tissue, initial procedure (88342)181 services
- Cell examination of specimen, selective cellular enhancement technique (88112)146 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%
- Arthritis56%
- Ischemic heart disease36%
- Diabetes35%
- Anxiety35%
Hospitals where Oleksii Iakymenko works
Medicare's Facility Affiliation Data lists Oleksii Iakymenko 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.
- Harrisburg Medical CenterHarrisburg, IL · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 140210
- Heartland Regional Medical CenterMarion, IL · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 140184
- Herrin HospitalHerrin, IL · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 140011
- Memorial Hospital of CarbondaleCarbondale, IL · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 140164
- St Joseph Memorial HospitalMurphysboro, IL · Critical Access Hospital · Emergency services: listed by Medicare · CCN 141334
Practice locations
Addresses where Oleksii Iakymenko is enrolled with Medicare (CMS data updated October 2, 2026).
- 201 S 14th StHerrin, IL 62948 (618) 942‑2171
- 405 W Jackson StCarbondale, IL 62901 (618) 549‑0721
Group practices
Medicare enrollment lists Oleksii Iakymenko as a member of this group (CMS data updated October 2, 2026).
- Southern Illinois Medical Services NFP334 clinicians in the group
Specialties
- Pathologyprimary
Other pathologists in Herrin
Clinicians with the same Medicare primary specialty in Herrin, IL — not a recommendation.
Other clinicians in Southern Illinois Medical Services NFP
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Graduation year | 2007 (19 years since medical school) |
|---|---|
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1598286353 |
| 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