Quick answers
- Does James J. Walsh Jr. accept Medicare assignment?
- Yes. Medicare's clinician data says James J. Walsh Jr. 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 James J. Walsh Jr. see?
- In 2024, CMS data shows 260 Original Medicare patients and 681 services for James J. Walsh Jr.. This counts Original Medicare only and measures volume, not quality.
- What is James J. Walsh Jr.'s NPI number?
- 1417913161. 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 James J. Walsh Jr., 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 | 260 |
|---|---|
| Services billed to Medicare | 681 |
| Different services or procedures | 80 |
| Participating Medicare provider | Yes |
| Average age of these patients | 77 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)105 services
- New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)70 services
- Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)64 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)49 services
- Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)45 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%
- Ischemic heart disease72%
- Arthritis55%
- Diabetes53%
- Chronic kidney disease53%
Hospitals where James J. Walsh Jr. works
Medicare's Facility Affiliation Data lists James J. Walsh Jr. 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.
- Edward HospitalNaperville, IL · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 140231
- Elmhurst Memorial HospitalElmhurst, IL · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 140200
Practice locations
Addresses where James J. Walsh Jr. is enrolled with Medicare (CMS data updated October 2, 2026).
- 2650 Warrenville Rd, Suite 280Downers Grove, IL 60515 (630) 324‑7900
- 801 S Washington StNaperville, IL 60540 (630) 527‑3083
Group practices
Medicare enrollment lists James J. Walsh Jr. as a member of this group (CMS data updated October 2, 2026).
- Cardiac Surgery Associates SC44 clinicians in the group
Specialties
- Vascular Surgeryprimary
Other vascular surgeons in Illinois
Clinicians with the same Medicare primary specialty in Illinois — not a recommendation.
Other clinicians in Cardiac Surgery Associates SC
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 | 1981 (45 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1417913161 |
| 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