Mumtaz A. Siddiqui, MD

Medicare activity in 2024

Official CMS public-use data for Mumtaz A. Siddiqui, 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 35 minutes (99232)5,259 services
2. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)190 services
3. Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)155 services
4. Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)114 services
5. Ultrasound of heart with color-depicted blood flow, rate, direction and valve function (93306)40 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%
• Heart failure75%
• Ischemic heart disease69%
• Chronic kidney disease67%
• Atrial fibrillation64%

Hospitals where Mumtaz A. Siddiqui works

Medicare's Facility Affiliation Data lists Mumtaz A. Siddiqui 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
• Loretto HospitalChicago, IL · Acute Care Hospital · Emergency services: listed by Medicare · CCN 140083
• 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 Memorial HospitalChicago, IL · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 140281

Practice locations

Addresses where Mumtaz A. Siddiqui is enrolled with Medicare (CMS data updated October 2, 2026).

• 26 W171 Roosevelt RdWheaton, IL 60187 (630) 909‑8000
• 365 E N AveNorthlake, IL 60164 (708) 345‑8100

Specialties

• Cardiovascular Disease (Cardiology)primary
• Cardiac Electrophysiologyalso
• Internal Medicinealso

Find other Cardiovascular Disease (Cardiology) doctors in Illinois →

Other cardiologists in Illinois

Clinicians with the same Medicare primary specialty in Illinois — not a recommendation.

• Manfred J. Pyka, MD
• Amber Fatima, MD
• Rickyn Patel, DO
• Boaz Avitall, MD
• Nasaraiah Nallamothu, MD
• Mark Rabbat, MD
• Michael R. Bauer, MD
• Ulrich Luft, MD

All cardiologists in Illinois →

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