Quick answers
- Does Euclid J. St Hill accept Medicare assignment?
- Yes. Medicare's clinician data says Euclid J. St Hill 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 Euclid J. St Hill see?
- In 2024, CMS data shows 1,005 Original Medicare patients and 7,953 services for Euclid J. St Hill. This counts Original Medicare only and measures volume, not quality.
- What is Euclid J. St Hill's NPI number?
- 1740703990. 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 Euclid J. St Hill, 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 | 1,005 |
|---|---|
| Services billed to Medicare | 7,953 |
| Different services or procedures | 41 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)1,844 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)864 services
- Dialysis services, per day, less than full month service (20 years or older) (90970)841 services
- Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)457 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)439 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%
- Chronic kidney disease75%
- Diabetes51%
- Heart failure47%
- Arthritis42%
Hospitals where Euclid J. St Hill works
Medicare's Facility Affiliation Data lists Euclid J. St Hill 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.
- Burgess Health CenterOnawa, IA · Critical Access Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 161359
- Cherokee Regional Medical CenterCherokee, IA · Critical Access Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 161362
- Crawford County Memorial HospitalDenison, IA · Critical Access Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 161369
- Dunes Surgical HospitalDakota Dunes, SD · Acute Care Hospital · Emergency services: not listed by Medicare · CCN 430089
- St Lukes Regional Medical CenterSioux City, IA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 160146
Practice locations
Addresses where Euclid J. St Hill is enrolled with Medicare (CMS data updated October 2, 2026).
- 357 W Tower RdDakota Dunes, SD 57049 (712) 255‑7746
- 801 5th StSioux City, IA 51101 (712) 255‑7746
Group practices
Medicare enrollment lists Euclid J. St Hill as a member of this group (CMS data updated October 2, 2026).
- Liem Som Oei MD PC6 clinicians in the group
Specialties
- Nephrologyprimary
Other nephrologists in South Dakota
Clinicians with the same Medicare primary specialty in South Dakota — not a recommendation.
Other clinicians in Liem Som Oei MD PC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2011 (15 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1740703990 |
| 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