Quick answers
- Does William R. Sterba Ii accept Medicare assignment?
- Yes. Medicare's clinician data says William R. Sterba Ii 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 William R. Sterba Ii see?
- In 2024, CMS data shows 954 Original Medicare patients and 2,881 services for William R. Sterba Ii. This counts Original Medicare only and measures volume, not quality.
- What is William R. Sterba Ii's NPI number?
- 1104877182. 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 William R. Sterba Ii, 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 | 954 |
|---|---|
| Services billed to Medicare | 2,881 |
| Different services or procedures | 51 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- X-ray of hip, 2-3 views (73502)439 services
- X-ray of knee, 4 or more views (73564)354 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)315 services
- X-ray of knee, 3 views (73562)291 services
- Injection, betamethasone acetate 3 mg and betamethasone sodium phosphate 3 mg (J0702)217 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 cholesterol75%
- Arthritis75%
- High blood pressure70%
- Ischemic heart disease25%
- Anxiety22%
- Diabetes21%
Hospitals where William R. Sterba Ii works
Medicare's Facility Affiliation Data lists William R. Sterba Ii 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.
- Northwestern Medicine Central Dupage HospitalWinfield, IL · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 140242
- Northwestern Medicine Delnor Community HospitalGeneva, IL · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 140211
- Northwestern Medicine Kishwaukee HospitalDekalb, IL · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 140286
- Northwestern Medicine McHenryMcHenry, IL · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 140116
- Palos Community HospitalPalos Heights, IL · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 140062
Practice locations
Addresses where William R. Sterba Ii is enrolled with Medicare (CMS data updated October 2, 2026).
- 27650 Ferry RdWarrenville, IL 60555 (630) 225‑2663
Group practices
Medicare enrollment lists William R. Sterba Ii as a member of this group (CMS data updated October 2, 2026).
- Central Dupage Physician Group1,080 clinicians in the group
Specialties
- Orthopedic Surgeryprimary
Other orthopedic surgeons in Warrenville
Clinicians with the same Medicare primary specialty in Warrenville, IL — not a recommendation.
Other clinicians in Central Dupage Physician Group
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Tulane University School Of Medicine |
| Graduation year | 2000 (26 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1104877182 |
| 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