Medicare Enrolled
Dr. Sudarshan Chatterjee, MD FACC
Cardiovascular Disease · Montclair, CA
Practice pattern: Cardiac Imaging
— Practice with significant diagnostic imaging and stress testing
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. Chatterjee 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. Chatterjee
Dr. Sudarshan Chatterjee is a cardiovascular disease specialist in Montclair, CA, with 19 years of NPI registration. Based on federal Medicare data, Dr. Chatterjee performed 4,515 Medicare services across 3,096 unique beneficiaries.
Between the years covered by Open Payments, Dr. Chatterjee received a total of $4,531 from 37 pharmaceutical and/or device companies across 211 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in cardiovascular disease. 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. Chatterjee 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 23% volume in CA
$4,531 industry payments
Medicare Practice Summary
Medicare Utilization ↗4,515
Medicare services
Top 23% in CA for cardiovascular disease
3,096
Unique beneficiaries
$91
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
~238 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 |
|---|---|---|---|
| Echocardiogram, transthoracic An ultrasound of the heart that uses color to show blood flow, rate, direction, and valve function. |
591 | $97 | $393 |
| 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. |
591 | $91 | $301 |
| Technetium Tc-99m sestamibi diagnostic injection A diagnostic injection of technetium Tc-99m sestamibi used for imaging studies. |
553 | $95 | $155 |
| Regadenoson injection (Lexiscan) for heart stress test An injection of regadenoson, a medication used to stress the heart during diagnostic testing. |
552 | $44 | $106 |
| Office visit, established patient, complex (40-54 min) An office or outpatient visit for an existing patient lasting between 40 and 54 minutes. This level of service is determined by the total time spent on the date of the encounter. |
418 | $142 | $420 |
| 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. |
415 | $233 | $825 |
| 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. |
403 | $11 | $43 |
| 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. |
307 | $50 | $206 |
| New patient office visit, complex (60-74 min) | 172 | $150 | $514 |
| EKG interpretation and report A standard electrocardiogram test that records the heart's electrical activity using at least 12 leads. The service includes a professional interpretation of the results and a written report. |
169 | $6 | $24 |
| 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. |
139 | $50 | $323 |
| Perflutren lipid microspheres injection Injection of perflutren lipid microspheres, measured per milliliter. |
69 | $35 | $80 |
| Pacemaker programming, dual lead system Adjustment and configuration of a dual-lead pacemaker device to ensure proper operation and settings. |
46 | $40 | $144 |
| Prolonged office E/M service, first 15 minutes This code is used for additional time spent by a physician beyond the maximum required time of a primary office or outpatient evaluation and management service. It is billed in 15-minute increments based on total time spent on the date of the primary service. |
30 | $26 | $134 |
| 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. |
24 | $130 | $390 |
| Telephone medical discussion, 21-30 minutes A telephone conversation with a physician lasting between 21 and 30 minutes. This code covers the time spent discussing medical matters over the phone. |
21 | $94 | $302 |
| Initial hospital admission, high complexity Initial hospital inpatient or observation care for a new patient involving high-level medical decision making, with at least 75 minutes total time on the date of the encounter. |
15 | $130 | $459 |
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.
14.1% high complexity
42.0% medium
43.9% routine
Industry Payment Transparency
Open Payments through 2024 ↗$4,531
Total received (2018-2024)
Avg $906/year across 5 years
Top 43% in CA for cardiovascular disease
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
37
Companies
211
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
$4,239 (93.6%)
Speaking / Promotional
Speaker programs, honoraria, and industry-sponsored educational events
$292 (6.4%)
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$1,280
2023
$1,370
2022
$517
2019
$287
2018
$1,077
Payments by company (2024)
Consulting
Speaking
Meals & Travel
Research
Novartis Pharmaceuticals Corporation
$207
Amgen Inc.
$151
Kiniksa Pharmaceuticals International, plc
$138
Boehringer Ingelheim Pharmaceuticals, Inc.
$98
Novo Nordisk Inc
$90
PFIZER INC.
$85
HARMONY BIOSCIENCES LLC
$65
Janssen Pharmaceuticals, Inc
$60
Actelion Pharmaceuticals US, Inc.
$50
Harmony Biosciences Llc
$50
United Therapeutics Corporation
$47
AstraZeneca Pharmaceuticals LP
$46
Avadel CNS Pharmaceuticals, LLC
$29
Esperion Therapeutics, Inc.
$28
Boston Scientific Corporation
$22
E.R. Squibb & Sons, L.L.C.
$22
SANOFI-AVENTIS U.S. LLC
$19
Merck Sharp & Dohme LLC
$18
GlaxoSmithKline, LLC.
$17
ZOLL Services LLC (A/K/A ZOLL LifeCor Corp)
$17
SCPHARMACEUTICALS INC.
$15
AltaThera Pharmaceuticals LLC
$6
Top 3 companies account for 38.8% of 2024 payments
All-time payments by company (2018-2024) ›
Amgen Inc.
$722
Novartis Pharmaceuticals Corporation
$410
AstraZeneca Pharmaceuticals LP
$377
Janssen Pharmaceuticals, Inc
$280
Boehringer Ingelheim Pharmaceuticals, Inc.
$277
PFIZER INC.
$228
Merck Sharp & Dohme LLC
$196
ZOLL Services LLC (A/K/A ZOLL LifeCor Corp)
$192
Novo Nordisk Inc
$191
Silk Road Medical, Inc.
$173
Boston Scientific Corporation
$173
Harmony Biosciences LLC
$139
Kiniksa Pharmaceuticals International, plc
$138
E.R. Squibb & Sons, L.L.C.
$137
Kiniksa Pharmaceuticals, Ltd.
$115
Actelion Pharmaceuticals US, Inc.
$88
HeartFlow, Inc.
$71
Gilead Sciences, Inc.
$67
HARMONY BIOSCIENCES LLC
$65
Abbott Laboratories
$53
Harmony Biosciences Llc
$50
United Therapeutics Corporation
$47
SCPHARMACEUTICALS INC.
$45
SANOFI-AVENTIS U.S. LLC
$41
Avadel CNS Pharmaceuticals, LLC
$29
Lantheus Medical Imaging, Inc.
$28
Esperion Therapeutics, Inc.
$28
Bayer Healthcare Pharmaceuticals Inc.
$26
Impulse Dynamics (USA) Inc.
$24
Inspire Medical Systems, Inc.
$23
Medtronic Vascular, Inc.
$23
GlaxoSmithKline, LLC.
$17
W. L. Gore & Associates, Inc.
$14
Aegerion Pharmaceuticals, Inc.
$13
Braemar Manufacturing, LLC
$13
Daiichi Sankyo Inc.
$11
AltaThera Pharmaceuticals LLC
$6
Top 3 companies account for 33.3% of all-time payments
Associated products mentioned in payments ›
ACCOLADE · AIRSUPRA · Adempas · Arcalyst · BELSOMRA · BRILINTA · CAMZYOS · CARDIOFORM Septal Occluder · CHANTIX · Cardiac Monitoring Suite · Connectivity and Remote care · Corlanor · DEFINITY · DYNAGEN · ELIQUIS · ENROUTE Transcarotid Neuroprotection System · ENTRESTO · FARXIGA · FFRct · FUROSCIX · GENERAL THERAPIES · GENERAL - THERAPIES · INJECTAFER · INSPIRE · JARDIANCE · JUXTAPID · LATITUDE · LEQVIO · LUMRYZ · LifeVest · MULTAQ · Merlin Connectivity and Remote · MyCareLink · NEXLETOL · NUCALA · OPSUMIT · OPTIMIZER · Ozempic · PRADAXA · PRALUENT · RESONATE · Repatha · Rybelsus · STIOLTO RESPIMAT · Sotalol Hydrochloride · TEZSPIRE · TYVASO · UPTRAVI · VERQUVO · VYNDAQEL · Varithena Administration Pack · WAINUA · WAKIX · Wegovy · XARELTO
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 (94%) are for meals and travel — low-value interactions that are common across virtually all practicing physicians.
Geographic Context
Cardiologists within 10 mi
210
Per 100K population
9.6
County median income
$82,184
Nearest hospital
MONTCLAIR HOSPITAL MEDICAL CENTER
0.0 mi
0.0 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. Chatterjee is a cardiac imaging specialist, with above-average Medicare volume (top 23% in CA), with low-engagement industry engagement, 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. Chatterjee experienced with echocardiogram, transthoracic?
Based on Medicare claims data, Dr. Chatterjee performed 591 echocardiogram, transthoracic 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. Chatterjee receive payments from pharmaceutical companies?
Yes. Dr. Chatterjee received a total of $4,531 from 37 companies across 211 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. Chatterjee's costs compare to other cardiologists in Montclair?
Dr. Chatterjee's average Medicare payment per service is $91. 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. Chatterjee) 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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