Quick answers
- Does Russell S. Sudbury accept Medicare assignment?
- Yes. Medicare's clinician data says Russell S. Sudbury 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 Russell S. Sudbury see?
- In 2024, CMS data shows 201 Original Medicare patients and 242 services for Russell S. Sudbury. This counts Original Medicare only and measures volume, not quality.
- What is Russell S. Sudbury's NPI number?
- 1548215312. 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 Russell S. Sudbury, 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 | 201 |
|---|---|
| Services billed to Medicare | 242 |
| Different services or procedures | 15 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Emergency department visit with low level of medical decision making (99283)56 services
- Emergency department visit with moderate level of medical decision making (99284)51 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)43 services
- Emergency department visit with high level of medical decision making (99285)30 services
- New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)27 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 cholesterol69%
- Arthritis42%
- Chronic kidney disease30%
- Diabetes29%
- Ischemic heart disease25%
Hospitals where Russell S. Sudbury works
Medicare's Facility Affiliation Data lists Russell S. Sudbury 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.
- Aspirus Tomahawk HospitalTomahawk, WI · Critical Access Hospital · Emergency services: listed by Medicare · CCN 521313
Practice locations
Addresses where Russell S. Sudbury is enrolled with Medicare (CMS data updated October 2, 2026).
- 29980 Network PlChicago, IL 60673
- 4425 N Port Washington RdGlendale, WI 53212
Specialties
- Family Practiceprimary
Other family doctors in Chicago
Clinicians with the same Medicare primary specialty in Chicago, IL — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Illinois College Of Med (chi/peor/rock/chm-Urb) |
| Graduation year | 1983 (43 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1548215312 |
| 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