Demetra V. Rupp, MD

Medicare activity in 2024

Official CMS public-use data for Demetra V. Rupp, 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. Injection, denosumab, 1 mg (J0897)2,880 services
2. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)402 services
3. Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)286 services
4. Hemoglobin a1c level (83036)215 services
5. Continuous monitoring of blood sugar level in tissue fluid using sensor under skin with interpretation and report (95251)192 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%
• Diabetes56%
• Arthritis47%
• Osteoporosis34%
• Ischemic heart disease33%

Hospitals where Demetra V. Rupp works

Medicare's Facility Affiliation Data lists Demetra V. Rupp 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

Practice locations

Addresses where Demetra V. Rupp is enrolled with Medicare (CMS data updated October 2, 2026).

• 302 Randall RdGeneva, IL 60134 (630) 377‑7900

Group practices

Medicare enrollment lists Demetra V. Rupp as a member of this group (CMS data updated October 2, 2026).

• Central Dupage Physician Group1,080 clinicians in the group

Specialties

• Endocrinologyprimary
• Internal Medicinealso

Find other Endocrinology doctors in Illinois →

Other endocrinologists in Geneva

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

• Tiffany A. Karas, MD
• Zeenat Parveen, MD
• Steven J. Bielski, MD

All endocrinologists in Geneva →

Other clinicians in Central Dupage Physician Group

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

• Rebekah C. Kelly
• Vanitha P. Asokan, MD
• Marcus Stammen, DO
• Ebrahim Amani, MD
• Alexandra J. Rzepka, MD
• Robert D. Vacek, MD

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