Medicare Enrolled
Dr. Mani Nallasivan, M.D.
Clinical Cardiac Electrophysiology Physician · Merced, CA
Practice pattern: Clinical Cardiology
— Primarily office-based clinical cardiology
Mixed 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. Nallasivan 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. Nallasivan
Dr. Mani Nallasivan is a clinical cardiac electrophysiology physician in Merced, CA, with 20 years of NPI registration. Based on federal Medicare data, Dr. Nallasivan performed 7,437 Medicare services across 3,753 unique beneficiaries.
Between the years covered by Open Payments, Dr. Nallasivan received a total of $15,791 from 37 pharmaceutical and/or device companies across 268 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in clinical cardiac electrophysiology physician. Payments are distributed across multiple categories and often reflect legitimate professional engagement with the medical industry. Patients may wish to discuss these relationships with their provider.
The Data Coverage level for Dr. Nallasivan 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.
✓ 20 years in practice
▲ Top 6% volume in CA
$15,791 industry payments
Medicare Practice Summary
Medicare Utilization ↗7,437
Medicare services
Top 6% in CA for clinical cardiac electrophysiology physician
3,753
Unique beneficiaries
$60
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
~372 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. |
2,400 | $0 | $8 |
| 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. |
2,131 | $66 | $92 |
| 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. |
500 | $81 | $162 |
| Echocardiogram, transthoracic An ultrasound of the heart that uses color to show blood flow, rate, direction, and valve function. |
398 | $155 | $540 |
| Technetium Tc-99m sestamibi diagnostic injection A diagnostic injection of technetium Tc-99m sestamibi used for imaging studies. |
222 | $66 | $250 |
| 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. |
182 | $11 | $50 |
| Nuclear stress test with CT scan A nuclear medicine imaging test that evaluates blood flow in the heart muscle at rest and during stress, performed alongside a concurrent CT scan. |
166 | $71 | $179 |
| Ultrasound of arm or leg veins An ultrasound exam of the veins in the arm or leg. The test uses sound waves to check blood flow and may include compression and other maneuvers. |
138 | $147 | $400 |
| Additional sedation, per 15 minutes Administration of a drug to deepen sedation during a procedure. This code covers each additional 15-minute increment of sedation beyond the initial period. |
123 | $9 | $25 |
| 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. |
112 | $50 | $278 |
| 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. |
111 | $365 | $900 |
| 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. |
105 | $197 | $370 |
| Intravenous drug injection A procedure involving the administration of a medication or substance directly into a vein. |
102 | $31 | $85 |
| Pacemaker programming, dual lead system Adjustment and configuration of a dual-lead pacemaker device to ensure proper operation and settings. |
87 | $25 | $66 |
| 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. |
68 | $52 | $150 |
| Midazolam injection, per 1 mg Administration of midazolam hydrochloride, a sedative medication, measured in 1 mg increments. |
63 | $0 | $8 |
| Continuous ECG monitoring, up to 30 days Continuous heart rhythm monitoring for up to 30 days, including professional review and reporting of the results. |
60 | $20 | $75 |
| 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. |
60 | $717 | $1,040 |
| Remote pacemaker/defibrillator monitoring, 90 days Remote evaluation of a pacemaker or implantable defibrillator system within 90 days of the last check. |
35 | $13 | $48 |
| Radiologist review of additional artery image A radiologist reviews an additional image of an artery. This step involves professional interpretation of the imaging data. |
33 | $37 | $213 |
| Remote pacemaker monitoring, 90 days Remote assessment of a pacemaker system, including single, dual, multiple lead, or leadless devices, performed up to 90 days apart. |
30 | $15 | $61 |
| Intravenous injection of additional new drug or substance Administration of an additional new medication or substance directly into a vein. |
27 | $13 | $43 |
| Ultrasound guidance for blood vessel access Use of ultrasound imaging to help locate and access a blood vessel. This guidance assists healthcare providers in performing procedures such as inserting IV lines or drawing blood. |
26 | $33 | $56 |
| Additional sequential IV infusion, 1 hour or less This code represents an additional intravenous infusion administered sequentially to a primary infusion. It covers the administration time of one hour or less. |
25 | $24 | $60 |
| Sedation by physician, initial 15 minutes Administration of a drug to induce depression of consciousness by the physician performing a procedure. This code covers the initial 15 minutes of sedation for patients aged 5 years or older. |
25 | $42 | $100 |
| Diphenhydramine injection, up to 50 mg An injection of diphenhydramine hydrochloride, an antihistamine medication, administered in a dose of up to 50 milligrams. |
25 | $1 | $5 |
| Intravenous infusion, 1 hour or less Administration of medication or fluid directly into a vein for therapeutic, preventive, or diagnostic purposes. The procedure lasts one hour or less. |
24 | $54 | $115 |
| Injection, fentanyl citrate, 0.1 mg | 24 | $1 | $5 |
| Radiologist review of arm or leg artery images A radiologist reviews images of the arteries in one or both arms or legs to assess blood flow and vessel health. |
19 | $130 | $391 |
| Laser vein destruction with imaging guidance This procedure uses laser energy to destroy a faulty vein in the arm or leg. Imaging guidance is used to ensure accurate placement during the treatment. |
18 | $809 | $4,500 |
| Programming of single lead implantable defibrillator system Adjustment and testing of the settings for a single-lead implantable cardioverter-defibrillator (ICD) to ensure proper function. |
18 | $30 | $71 |
| Radiologist review of abdominal aorta image A radiologist reviews images of the abdominal aorta to evaluate the blood vessel. |
17 | $55 | $300 |
| 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. |
14 | $138 | $260 |
| Lactated Ringer's infusion, up to 1000 cc Intravenous administration of Lactated Ringer's solution, a fluid used to replace fluids and electrolytes, in amounts up to 1000 cubic centimeters. |
14 | $2 | $5 |
| Pacemaker system evaluation Assessment of a pacemaker device, including single, dual, multiple lead, or leadless systems. |
13 | $14 | $38 |
| 30-day continuous ECG with symptom monitoring This procedure involves continuous electrocardiogram monitoring for up to 30 days, including symptom tracking and a professional review and report of the results. |
11 | $144 | $428 |
| Normal saline infusion, 250 cc Administration of 250 cubic centimeters of normal saline solution into a vein. This procedure involves the intravenous delivery of a sterile saltwater fluid. |
11 | $1 | $10 |
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.
8.8% high complexity
47.6% medium
43.6% routine
Industry Payment Transparency
Open Payments through 2024 ↗$15,791
Total received (2018-2024)
Avg $2,256/year across 7 years
Bottom 45% in CA for clinical cardiac electrophysiology physician
37
Companies
268
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.
Other
Charitable contributions, space rental, and other categories
$11,083 (70.2%)
Meals & Travel
Food, beverages, travel, and lodging — typically low-value
$4,708 (29.8%)
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$655
2023
$935
2022
$11,586
2021
$425
2020
$643
2019
$680
2018
$868
Payments by company (2024)
Consulting
Speaking
Meals & Travel
Research
Amgen Inc.
$169
AstraZeneca Pharmaceuticals LP
$80
Novo Nordisk Inc
$75
Abbott Laboratories
$65
Bayer Healthcare Pharmaceuticals Inc.
$41
Tactile Systems Technology Inc
$40
Janssen Pharmaceuticals, Inc
$35
Baxter Healthcare
$29
Genentech USA, Inc.
$26
Edwards Lifesciences Corporation
$23
BIOTRONIK INC.
$21
E.R. Squibb & Sons, L.L.C.
$20
ZOLL Services LLC (A/K/A ZOLL LifeCor Corp)
$19
Novartis Pharmaceuticals Corporation
$15
Top 3 companies account for 49.4% of 2024 payments
All-time payments by company (2018-2024) ›
AngioDynamics, Inc.
$11,125
Amgen Inc.
$923
Abbott Laboratories
$582
Ra Medical Systems, Inc.
$573
Janssen Pharmaceuticals, Inc
$270
Koya Medical, Inc.
$257
Novartis Pharmaceuticals Corporation
$229
Medtronic, Inc.
$177
AstraZeneca Pharmaceuticals LP
$175
Tactile Systems Technology Inc
$169
E.R. Squibb & Sons, L.L.C.
$123
PFIZER INC.
$109
Medtronic Vascular, Inc.
$104
BIOTRONIK INC.
$101
Baxter Healthcare
$81
Novo Nordisk Inc
$75
Edwards Lifesciences Corporation
$74
Philips Electronics North America Corporation
$71
ARALEZ PHARMACEUTICALS US INC.
$68
Boehringer Ingelheim Pharmaceuticals, Inc.
$57
Akcea Therapeutics, Inc.
$48
Smith+Nephew, Inc.
$42
Bayer Healthcare Pharmaceuticals Inc.
$41
Boston Scientific Corporation
$37
Amarin Pharma Inc.
$34
Organogenesis Inc.
$33
Vascular Insights, LLC
$30
Genentech USA, Inc.
$26
Bardy Diagnostics, Inc.
$24
Regeneron Healthcare Solutions, Inc.
$22
SANOFI-AVENTIS U.S. LLC
$21
ZOLL Services LLC (A/K/A ZOLL LifeCor Corp)
$19
Cardiovascular Systems Inc.
$17
ASAHI INTECC USA, INC.
$15
ARBOR PHARMACEUTICALS, INC.
$14
Allergan Inc.
$13
Shockwave Medical, Inc
$13
Top 3 companies account for 80.0% of all-time payments
Associated products mentioned in payments ›
ACCENT · ASAHI PTCA Guide Wire · ASSURITY · AVYCAZ · Acticor 7 VR-T DX · Aranesp · Armada 35 percutaneous catheter · Auryon Laser System 100-120 Vac · Azure · BIOMONITOR · BRILINTA · Bidil · BioMonitor · CAMZYOS · CHANTIX · COLLAGENASE SANTYL · CONFIRM RX · CardioMEMS HF System · Carnation Ambulatory Monitor · Clarivein · ClosureFast · Cobalt · Confirm Rx · Corlanor · DABRA · DABRA 101 Catheter · DABRA laser system · Dayspring · ELIQUIS · EMBLEM · ENTRESTO · Edwards SAPIEN 3 Ultra Transcatheter Heart Valve · FARXIGA · FLEXITOUCH · Flexitouch Plus · GALLANT · HAWKONE · Hillrom - Cardiac Ambulatory Monitor · Hillrom - Carnation Ambulatory Monitor · IGT_D Peripheral · JARDIANCE · JOT DX · Kerendia · LEQVIO · LifeVest · MYCARELINK · Merlin Connectivity and Remote · Ocrevus · PRALUENT · PRALUENT ALIROCUMAB INJECTION · Perclose ProGlide suture mediated closure system · Peripheral Orbital Atherectomy System · Puraply · RESONATE · Renamic Neo · Repatha · Reveal LINQ · SAPIEN 3 Ultra RESILIA · Santyl · Stellarex · TEGSEDI · TEZSPIRE · TYRX · VENASEAL · Vascepa · Vascular Lithotripsy · XARELTO · ZONTIVITY
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 →
Payments are distributed across multiple categories with no single dominant type.
Geographic Context
Clinical cardiac electrophysiology physicians within 10 mi
1
Per 100K population
0.4
County median income
$65,044
Nearest hospital
MERCY 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. Nallasivan is a clinical cardiology specialist, with above-average Medicare volume (top 6% in CA), with mixed engagement industry engagement, with 20 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. Nallasivan experienced with adenosine injection, 1 mg?
Based on Medicare claims data, Dr. Nallasivan performed 2,400 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. Nallasivan receive payments from pharmaceutical companies?
Yes. Dr. Nallasivan received a total of $15,791 from 37 companies across 268 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. Nallasivan's costs compare to other clinical cardiac electrophysiology physicians in Merced?
Dr. Nallasivan's average Medicare payment per service is $60. 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. Nallasivan) 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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