Medicare Enrolled
Dr. Leon Kupferwasser, M.D.
Internal Medicine · Van Nuys, CA
Practice pattern: Remote Monitoring
— Significant remote device monitoring activity
Low-engagement
Very High
DATA COVERAGE
Data in 4 of 4 federal sources
Measures public federal data availability — not provider quality
Informational, not a quality rating.
This page presents federal public records about Dr. Kupferwasser from CMS (NPPES, Open Payments, Medicare Provider Utilization, PECOS). It is not medical advice, an endorsement, or a judgment of clinical quality. Always consult the provider directly and a licensed clinician for medical decisions. Read methodology →
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What this data tells you about Dr. Kupferwasser
Dr. Leon Kupferwasser is an internal medicine specialist in Van Nuys, CA, with 19 years of NPI registration. Based on federal Medicare data, Dr. Kupferwasser performed 22,223 Medicare services across 6,238 unique beneficiaries.
Between the years covered by Open Payments, Dr. Kupferwasser received a total of $6,754 from 40 pharmaceutical and/or device companies across 358 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in internal medicine. Most payments are for meals and travel — low-value interactions common across virtually all practicing physicians. Patients may wish to discuss these relationships with their provider.
The Data Coverage level for Dr. Kupferwasser is Very High — reflecting how much public federal data is available about this provider. Patients are encouraged to use this data as one of several factors when choosing a healthcare provider.
✓ 19 years in practice
▲ Top 1% volume in CA
$6,754 industry payments
Medicare Practice Summary
Medicare Utilization ↗22,223
Medicare services
Top 1% in CA for internal medicine
6,238
Unique beneficiaries
$37
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
~1,170 Medicare services per year of practice
Top procedures by volume
Ranked by number of services performed for Medicare patients. Avg. submitted charge is what the provider billed; avg. Medicare payment is what CMS paid.
| Procedure | Volume | Avg. paid | Avg. submitted |
|---|---|---|---|
| Adenosine injection, 1 mg Administration of a 1 mg dose of adenosine medication. This code is specifically for adenosine and excludes adenosine phosphate compounds. |
9,871 | $0 | $10 |
| Remote patient monitoring device, 30 days Initial setup of devices for remote monitoring of body functions with daily data transmission or alerts. This service covers the first 30 days of the monitoring period. |
2,837 | $47 | $82 |
| Electrocardiogram (EKG), 12-lead A standard heart rhythm test using at least 12 leads to record electrical activity. A healthcare provider interprets the results and provides a written report. |
2,183 | $11 | $90 |
| Remote patient monitoring management, 20 min/month Management based on results from remote vital sign monitoring for the first 20 minutes per calendar month. |
1,984 | $42 | $70 |
| Office visit, established patient (20-29 min) An office visit for an existing patient lasting between 20 and 29 minutes. The visit involves medical evaluation and management of the patient's condition. |
1,351 | $65 | $145 |
| Office visit, established patient (30-39 min) A follow-up office visit for an existing patient lasting between 30 and 39 minutes. The visit involves medical evaluation and management of the patient's condition. |
897 | $102 | $226 |
| Echocardiogram, transthoracic An ultrasound of the heart that uses color to show blood flow, rate, direction, and valve function. |
606 | $148 | $669 |
| Technetium Tc-99m sestamibi diagnostic injection A diagnostic injection of technetium Tc-99m sestamibi used for imaging studies. |
562 | $36 | $170 |
| Ultrasound of head and neck blood flow, bilateral An ultrasound exam that uses sound waves to visualize and assess blood flow in the vessels of both the head and the neck. |
536 | $164 | $500 |
| Exercise or drug-induced heart stress test with ECG A heart stress test performed using exercise or medication while monitoring the electrocardiogram under physician supervision and review. |
283 | $52 | $290 |
| Nuclear stress test of heart muscle A nuclear medicine imaging test that evaluates blood flow to the heart muscle at rest and during stress using a special camera. |
281 | $403 | $892 |
| Remote vital sign monitoring management, each additional 20 minutes This code covers the time spent by a provider managing patient data from remote vital sign monitoring devices. It applies to each additional 20-minute increment beyond the initial monthly service period. |
130 | $34 | $56 |
| Remote physiologic monitoring setup and education Initial setup of remote monitoring equipment and patient education on its use. |
126 | $18 | $28 |
| New patient office visit (45-59 min) An initial office visit for a new patient lasting between 45 and 59 minutes. This code covers the total time spent by the physician or qualified healthcare professional on the date of the encounter. |
111 | $125 | $373 |
| Stress echocardiogram with ECG monitoring An ultrasound of the heart performed while monitoring heart rhythm during rest, exercise, or medication-induced stress, followed by a review and report of the findings. |
66 | $197 | $1,071 |
| 2-day continuous ECG with review and report A two-day continuous electrocardiogram recording that includes a professional review and written report of the results. |
64 | $54 | $466 |
| Echocardiogram, transthoracic An ultrasound test that uses sound waves to create images of the heart's blood flow, valves, and chambers. |
56 | $46 | $230 |
| Echocardiogram with color Doppler An ultrasound of the heart that uses color imaging to visualize blood flow, measure flow rate, and assess valve function. |
56 | $22 | $160 |
| Hospital follow-up visit, moderate complexity Follow-up hospital visit for an existing patient involving moderate medical decision making. The visit requires at least 35 minutes of time spent on the date of service. |
44 | $66 | $150 |
| New patient office visit (30-44 min) An initial office visit for a new patient lasting between 30 and 44 minutes. This code is used when the total time spent on the date of the encounter falls within this range. |
40 | $79 | $265 |
| Continuous ECG monitoring, up to 30 days Continuous heart rhythm monitoring for up to 30 days, including professional review and reporting of the results. |
28 | $22 | $80 |
| 30-day continuous ECG with patient-triggered event transmission and review This procedure involves continuous electrocardiogram monitoring for up to 30 days, including the transmission of patient-triggered events. A healthcare professional reviews the data and provides a report. |
28 | $799 | $2,100 |
| Office visit, established patient (10-19 min) An office visit for an existing patient lasting 10 to 19 minutes. The visit involves medical evaluation and management of the patient's condition. |
23 | $45 | $107 |
| Ultrasound of leg arteries or grafts An imaging test that uses sound waves to create pictures of the blood vessels in the legs or any surgical grafts present. |
22 | $210 | $540 |
| Pacemaker programming, dual lead system Adjustment and configuration of a dual-lead pacemaker device to ensure proper operation and settings. |
19 | $61 | $245 |
| Ultrasound of arm and leg arteries This procedure uses sound waves to create images of the blood vessels in the arms and legs. It allows healthcare providers to examine the structure and blood flow within these arteries. |
19 | $56 | $360 |
How to read this data: This reflects Medicare patients only (typically 65+). Payment amounts are what Medicare paid the provider, not your out-of-pocket cost. A higher procedure volume generally indicates more experience with that procedure.
3.1% high complexity
52.6% medium
44.3% routine
Industry Payment Transparency
Open Payments through 2024 ↗$6,754
Total received (2018-2024)
Avg $965/year across 7 years
Top 13% in CA for internal medicine
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
40
Companies
358
Individual payments
All payments are legal and publicly reported · Not evidence of wrongdoing · How to interpret →
Payment profile
Industry payments classified by relationship type. Not all payments are equal — research and consulting reflect different relationships than speaking programs or meals.
Meals & Travel
Food, beverages, travel, and lodging — typically low-value
$6,708 (99.3%)
Speaking / Promotional
Speaker programs, honoraria, and industry-sponsored educational events
$46 (0.7%)
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$1,008
2023
$1,161
2022
$1,174
2021
$895
2020
$374
2019
$978
2018
$1,164
Payments by company (2024)
Consulting
Speaking
Meals & Travel
Research
PFIZER INC.
$141
Merck Sharp & Dohme LLC
$121
Kiniksa Pharmaceuticals International, plc
$95
Boehringer Ingelheim Pharmaceuticals, Inc.
$94
Novartis Pharmaceuticals Corporation
$82
VivaQuant Inc, dba Rhythm Express
$65
Amgen Inc.
$57
SCPHARMACEUTICALS INC.
$56
E.R. Squibb & Sons, L.L.C.
$50
Medtronic, Inc.
$49
ZOLL Services LLC (A/K/A ZOLL LifeCor Corp)
$40
Lexicon Pharmaceuticals, Inc.
$37
AstraZeneca Pharmaceuticals LP
$36
Novo Nordisk Inc
$32
CVRx, Inc.
$23
Boston Scientific Corporation
$17
HEARTFLOW, INC.
$14
Top 3 companies account for 35.4% of 2024 payments
All-time payments by company (2018-2024) ›
PFIZER INC.
$940
Amgen Inc.
$802
Novartis Pharmaceuticals Corporation
$760
Merck Sharp & Dohme LLC
$469
AstraZeneca Pharmaceuticals LP
$381
ZOLL Services LLC (A/K/A ZOLL LifeCor Corp)
$307
Janssen Pharmaceuticals, Inc
$274
SANOFI-AVENTIS U.S. LLC
$272
Abbott Laboratories
$249
E.R. Squibb & Sons, L.L.C.
$248
Kiniksa Pharmaceuticals, Ltd.
$197
Boehringer Ingelheim Pharmaceuticals, Inc.
$196
Merck Sharp & Dohme Corporation
$142
Gilead Sciences, Inc.
$138
Medtronic, Inc.
$117
HeartFlow, Inc.
$107
SCPHARMACEUTICALS INC.
$101
Edwards Lifesciences Corporation
$95
Kiniksa Pharmaceuticals International, plc
$95
Bayer HealthCare Pharmaceuticals Inc.
$87
Boston Scientific Corporation
$86
Novo Nordisk Inc
$78
Pulmonx Corporation
$76
VivaQuant Inc, dba Rhythm Express
$65
Amarin Pharma Inc.
$61
Nevro Corp.
$58
G Medical Diagnostic Services, Inc.
$50
Itamar Medical Inc
$38
Noden Pharma USA Inc
$37
Lexicon Pharmaceuticals, Inc.
$37
Alnylam Pharmaceuticals Inc.
$35
CVRx, Inc.
$23
PORTOLA PHARMACEUTICALS, INC.
$22
Actelion Pharmaceuticals US, Inc.
$21
Esperion Therapeutics, Inc.
$20
BIOTRONIK INC.
$19
Philips Electronics North America Corporation
$17
HEARTFLOW, INC.
$14
Allergan Inc.
$12
Pfizer Inc.
$9
Top 3 companies account for 37.1% of all-time payments
Associated products mentioned in payments ›
(8874) inCourage · ACCOLADE SR · ANDEXXA · AZURE XT DR MRI SURESCAN · Adempas · Arcalyst · BRILINTA · BYSTOLIC · Barostim Neo System · BodyGuardian · CAMZYOS · CHANTIX · Cardiac Monitoring Suite · CoreValve Evolut · Corlanor · ELIQUIS · ENTRESTO · Edwards SAPIEN 3 Transcatheter Heart Valve · Edwards SAPIEN 3 Ultra Transcatheter Heart Valve · Ellipse ICD · FARXIGA · FFRct · FUROSCIX · Fortify Assura · GENERAL TACHY · JARDIANCE · LEQVIO · LOKELMA · LifeVest · MULTAQ · MYCARELINK · Mitra Clip system · NEXLETOL · ONPATTRO · OPSUMIT MACITENTAN · Omnia · Ozempic · PRADAXA · PRALUENT · Pulmonx Endobronchial Valve EBV · Quadra Assura CRT Defibrillator · Quartet CRT Lead · Repatha · Rhythm Express · Rybelsus · SAPIEN 3 Ultra RESILIA · SELECTSECURE · TEKTURNA · VERQUVO · VYNDAMAX · VYNDAQEL · Vascepa · WATCHMAN Access System · WatchPAT · Wegovy · XARELTO · XIENCE SKYPOINT
Should you be concerned? Payments from pharmaceutical and device companies are legal and common — 57% of U.S. physicians receive at least one. They often reflect legitimate consulting, research, or education. What matters is whether a recommended drug or device appears in your doctor's payment records. If so, consider asking your doctor about it. How to interpret this data →
Most payments (99%) are for meals and travel — low-value interactions that are common across virtually all practicing physicians.
Geographic Context
Internal medicine physicians within 10 mi
3,837
Per 100K population
39.0
County median income
$87,760
Nearest hospital
VALLEY PRESBYTERIAN HOSPITAL
2.4 mi
2.4 mi
Data Sources
| Provider Registry | ✓ NPPES | Weekly updates |
| Medicare Enrollment | ✓ PECOS | Monthly updates |
| Practice Data | ✓ Medicare Util. | Annual (CY lag) |
| Industry Payments | ✓ Open Payments | CY 2024 |
| Disciplinary History | — Not public | N/A |
This provider has data in 4 of 4 available federal datasets, with a Data Coverage level of Very High. This reflects how much public data is available about a provider. How we calculate this →
Summary
Dr. Kupferwasser is a remote monitoring specialist, with above-average Medicare volume (top 1% in CA), with low-engagement industry engagement in the top 13% of CA peers, with 19 years of NPI registration.
This summary is auto-generated from federal data, describing data availability and patterns. Read our methodology →
Frequently Asked Questions
Is Dr. Kupferwasser experienced with adenosine injection, 1 mg?
Based on Medicare claims data, Dr. Kupferwasser performed 9,871 adenosine injection, 1 mg services. Research suggests that higher procedure volume is often associated with better outcomes, particularly for complex procedures. Note that Medicare data only captures patients aged 65 and older, so the total practice volume across all patients is likely higher.
Does Dr. Kupferwasser receive payments from pharmaceutical companies?
Yes. Dr. Kupferwasser received a total of $6,754 from 40 companies across 358 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common among physicians — 57% of all U.S. physicians receive at least one industry payment. Patients may wish to ask their doctor about these relationships, especially if a recommended drug or device appears in the payment records.
How do Dr. Kupferwasser's costs compare to other internal medicine physicians in Van Nuys?
Dr. Kupferwasser's average Medicare payment per service is $37. Note that these figures represent what Medicare pays, not your out-of-pocket cost, which depends on your specific insurance plan and deductible. Procedure-level data above shows both what was submitted and what Medicare paid for each service type.
What does Data Coverage mean?
Data Coverage (currently Very High for Dr. Kupferwasser) measures how much public federal data is available about a provider. It is not a quality rating. A "Very High" or "High" level means the provider has data across multiple federal sources (NPPES, PECOS, Medicare Utilization, Open Payments), indicating a long track record of practice, Medicare participation, and industry disclosure. A "Low" or "Moderate" level may simply mean the provider is newer, does not see Medicare patients, or has not received any industry payments — none of which are inherently negative. Read our full methodology →
Is this data up to date?
Each data source has its own update cycle. Provider registry data (NPPES) is updated weekly. Medicare enrollment (PECOS) is updated monthly. Medicare practice data has a ~2 year lag — the most recent available is typically 2 years prior. Industry payment data (Open Payments) is published annually, usually in June, covering the prior calendar year. We display the data date prominently on each section so you always know how current it is. See our data freshness policy →
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About this page
All data on this page is sourced verbatim from public federal records published by the U.S. Centers for Medicare & Medicaid Services (CMS): NPPES ↗, Open Payments ↗, Medicare Provider Utilization ↗, and PECOS. Publication is mandated by the Physician Payments Sunshine Act (§6002 ACA, 42 U.S.C. §1320a-7h) and the Freedom of Information Act.
This page is not medical advice, an endorsement, a recommendation, or a quality rating. Data Coverage reflects data completeness — how much federal information exists for this provider — not clinical performance, patient outcomes, or quality of care. Always verify information directly with the provider and consult a licensed clinician before making medical decisions.
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