Quick answers
- Does Shishin Yamada accept Medicare assignment?
- Yes. Medicare's clinician data says Shishin Yamada 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 Shishin Yamada see?
- In 2024, CMS data shows 71 Original Medicare patients and 154 services for Shishin Yamada. This counts Original Medicare only and measures volume, not quality.
- What is Shishin Yamada's NPI number?
- 1962411793. 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 Shishin Yamada, 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 | 71 |
|---|---|
| Services billed to Medicare | 154 |
| Different services or procedures | 29 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes (99231)63 services
- Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)15 services
- New patient office or other outpatient visit with straightforward medical decision making, if using time, 15 minutes or more (99202)13 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%
- Arthritis61%
- Atrial fibrillation44%
- Ischemic heart disease39%
- Chronic kidney disease39%
Hospitals where Shishin Yamada works
Medicare's Facility Affiliation Data lists Shishin Yamada 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.
- CGH Medical CenterSterling, IL · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 140043
- Decatur Memorial HospitalDecatur, IL · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 140135
- Silver Cross Hospital and Medical CentersNew Lenox, IL · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 140213
Practice locations
Addresses where Shishin Yamada is enrolled with Medicare (CMS data updated October 2, 2026).
- 1 Memorial Dr, Suite 300Decatur, IL 62526 (217) 876‑5500
- 100 E Le Fevre RdSterling, IL 61081 (815) 625‑0400
- 100 E Lefevre RdSterling, IL 61081
- 101 E Miller RdSterling, IL 61081 (815) 625‑4790
- 1890 Silver Cross Blvd, Suite 550New Lenox, IL 60451 (815) 714‑9362
Group practices
Medicare enrollment lists Shishin Yamada as a member of these groups (CMS data updated October 2, 2026).
- CGH Medical Center197 clinicians in the group
- Decatur Memorial Hospital174 clinicians in the group
Specialties
- General Surgeryprimary
Other general surgeons in Decatur
Clinicians with the same Medicare primary specialty in Decatur, IL — not a recommendation.
Other clinicians in CGH Medical Center
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Illinois College Of Med (chi/peor/rock/chm-Urb) |
| Graduation year | 2001 (25 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1962411793 |
| 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