David J. Schlieben, MD

Medicare activity in 2024

Official CMS public-use data for David J. Schlieben, 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.

Most frequent services

1. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)480 services
2. Dialysis services, 4 or more physician visits per month (20 years or older) (90960)458 services
3. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)347 services
4. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)261 services
5. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)132 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%
• Diabetes63%
• Ischemic heart disease56%
• Arthritis55%

Hospitals where David J. Schlieben works

Medicare's Facility Affiliation Data lists David J. Schlieben 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

Practice locations

Addresses where David J. Schlieben is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 6; the Medicare profile lists all.

• 120 Spalding Dr, Suite 205and207Naperville, IL 60540 (630) 646‑6020
• 120 Spalding Dr, Suite 410Naperville, IL 60540 (630) 690‑1220
• 133 E Brush Hill RdElmhurst, IL 60126 (630) 832‑2183
• 2650 Ridge AveEvanston, IL 60201
• 801 S Washington StNaperville, IL 60540 (630) 527‑5197

Group practices

Medicare enrollment lists David J. Schlieben as a member of these groups (CMS data updated October 2, 2026).

• Endeavor Health Medical Group3,350 clinicians in the group
• Nephrology Associates of Northern Illinois Ltd117 clinicians in the group
• Nani-Ihp LLC7 clinicians in the group

Specialties

• Nephrologyprimary
• Internal Medicinealso

Find other Nephrology doctors in Illinois →

Other nephrologists in Naperville

Clinicians with the same Medicare primary specialty in Naperville, IL — not a recommendation.

• Ali Imtiaz, DO
• Mohammed S. Ahmed, DO
• Nilam Patel, MD
• Hsienta Fang, MD
• Shivani Shah, MD
• Regan M. Seipp, MD
• Kevin Pandya, MD

All nephrologists in Naperville →

Other clinicians in Endeavor Health Medical Group

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

• Laura S. Zaacks, MD
• Vincent O. Tello Jr., MD
• Jonathan J. Younan, MD
• Nishant Kumar, MD
• Brian Medley
• Priya K. Khosa

Clinician information

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

1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
6. Medicare Care Compare — official Medicare tool to look up clinicians