Leon I. Kupferwasser, MD

Medicare activity in 2024

Official CMS public-use data for Leon I. Kupferwasser, 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. Remote monitoring of physiologic parameters, initial supply of devices with daily recordings or programmed alerts transmission, each 30 days (99454)3,281 services
2. Management using the results of remote vital sign monitoring per calendar month, first 20 minutes (99457)3,129 services
3. Injection, adenosine, 1 mg (not to be used to report any adenosine phosphate compounds) (J0153)2,376 services
4. Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (93000)2,027 services
5. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)1,160 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%
• Arthritis60%
• Ischemic heart disease49%
• Diabetes48%
• Chronic kidney disease30%

Hospitals where Leon I. Kupferwasser works

Medicare's Facility Affiliation Data lists Leon I. Kupferwasser 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.

• Providence Cedars Sinai Tarzana Medical CenterTarzana, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 050761
• Valley Presbyterian HospitalVan Nuys, CA · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 050126

Practice locations

Addresses where Leon I. Kupferwasser is enrolled with Medicare (CMS data updated October 2, 2026).

• 16320 Roscoe Blvd, Suite 100Van Nuys, CA 91406 (818) 904‑6782

Group practices

Medicare enrollment lists Leon I. Kupferwasser as a member of this group (CMS data updated October 2, 2026).

• The Heart Medical Group8 clinicians in the group

Specialties

• Cardiovascular Disease (Cardiology)primary
• Internal Medicinealso

Find other Cardiovascular Disease (Cardiology) doctors in California →

Other cardiologists in Van Nuys

Clinicians with the same Medicare primary specialty in Van Nuys, CA — not a recommendation.

• Vahan Koshkaryan, MD
• Ramesh Arora, MD
• Rodney A. Samaan, MD
• Munaf A. Shamji, MD
• Michael N. Hakimi, DO

All cardiologists in Van Nuys →

Other clinicians in The Heart Medical Group

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

• Maryam Rahmanian, NP
• Tasnim E. Shamji, MD
• Ladan P. Hakimjavadi
• Munaf A. Shamji, MD
• Michael N. Hakimi, DO
• Menachem Wakslak, 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