Medicare Enrolled
Dr. Daren Primack, MD
Cardiovascular Disease · Stockton, CA
Practice pattern: Cardiac & Electrophysiology
— Practice combining cardiac and electrophysiology services
Speaking/Promotional
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. Primack 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. Primack
Dr. Daren Primack is a cardiovascular disease specialist in Stockton, CA, with 20 years of NPI registration. Based on federal Medicare data, Dr. Primack performed 2,214 Medicare services across 1,545 unique beneficiaries.
Between the years covered by Open Payments, Dr. Primack received a total of $252,826 from 48 pharmaceutical and/or device companies across 586 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in cardiovascular disease. The majority of payments are for speaking programs and promotional activities, reflecting participation in industry-sponsored events. Patients may wish to discuss these relationships with their provider.
The Data Coverage level for Dr. Primack 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 45% volume in CA
$252,826 industry payments
Medicare Practice Summary
Medicare Utilization ↗2,214
Medicare services
Top 45% in CA for cardiovascular disease
1,545
Unique beneficiaries
$86
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
~111 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 |
|---|---|---|---|
| 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. |
353 | $93 | $280 |
| 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. |
301 | $11 | $46 |
| Regadenoson injection (Lexiscan) for heart stress test An injection of regadenoson, a medication used to stress the heart during diagnostic testing. |
208 | $44 | $120 |
| Echocardiogram, transthoracic An ultrasound of the heart that uses color to show blood flow, rate, direction, and valve function. |
154 | $146 | $581 |
| 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. |
150 | $149 | $463 |
| 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. |
133 | $63 | $198 |
| Technetium Tc-99m tetrofosmin diagnostic injection A diagnostic injection of Technetium Tc-99m tetrofosmin used for imaging studies. |
130 | $75 | $187 |
| Remote cardiac rhythm monitor evaluation, up to 30 days Review and analysis of data from a remote cardiac rhythm monitoring system over a period of up to 30 days. |
109 | $19 | $69 |
| Remote monitoring of implantable heart rhythm device Evaluation of data transmitted remotely from an implantable cardiovascular monitor, such as a loop recorder or subcutaneous cardiac rhythm monitor, over a period up to 30 days. |
107 | $29 | $48 |
| 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. |
78 | $136 | $392 |
| 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. |
65 | $358 | $1,226 |
| 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. |
65 | $51 | $211 |
| Remote pacemaker/defibrillator monitoring, 90 days Remote evaluation of a pacemaker or implantable defibrillator system within 90 days of the last check. |
42 | $17 | $80 |
| New patient office visit, complex (60-74 min) | 37 | $137 | $476 |
| Critical care, first 30-74 min Emergency medical care for a critically ill or injured patient lasting between 30 and 74 minutes. This service involves direct patient care and medical decision making to stabilize the patient. |
36 | $168 | $469 |
| Hospital follow-up visit, high complexity Subsequent hospital inpatient or observation care for an existing patient involving high-level medical decision making, with at least 50 minutes total time on the date of the encounter. |
35 | $95 | $211 |
| 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 | $22 | $86 |
| Ultrasound of arm or leg veins An ultrasound exam of the veins in one arm or leg using compression and other maneuvers to assess blood flow and check for blockages. |
30 | $97 | $283 |
| 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. |
26 | $150 | $451 |
| Pacemaker programming, dual lead system Adjustment and configuration of a dual-lead pacemaker device to ensure proper operation and settings. |
24 | $61 | $221 |
| Smoking cessation counseling, 4-10 minutes A brief counseling session focused on helping patients quit smoking and tobacco use. The provider spends 4 to 10 minutes discussing strategies and support for cessation. |
22 | $15 | $34 |
| Pacemaker programming, single lead Adjustment and testing of a single-lead pacemaker to ensure it functions correctly. |
17 | $53 | $186 |
| 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 | $408 |
| Radiofrequency vein destruction, first vein A procedure to treat the first incompetent vein in the arm or leg using radiofrequency energy and imaging guidance. |
13 | $908 | $3,369 |
| Exercise or drug-induced heart stress test with ECG A heart stress test performed using exercise or medication while an electrocardiogram is monitored under physician supervision. |
12 | $17 | $56 |
| Exercise or drug-induced heart stress test with ECG A heart stress test performed using exercise or medication while monitoring the electrocardiogram, with physician review of the results. |
12 | $11 | $38 |
| 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. |
11 | $4 | $18 |
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.
12.1% high complexity
31.5% medium
56.4% routine
Industry Payment Transparency
Open Payments through 2024 ↗$252,826
Total received (2018-2024)
Avg $36,118/year across 7 years
Top 3% in CA for cardiovascular disease
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
48
Companies
586
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.
Speaking / Promotional
Speaker programs, honoraria, and industry-sponsored educational events
$235,674 (93.2%)
Consulting
Expert advisory fees, typically reflecting recognized clinical expertise
$9,964 (3.9%)
Meals & Travel
Food, beverages, travel, and lodging — typically low-value
$7,187 (2.8%)
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$5,827
2023
$48,623
2022
$36,562
2021
$29,239
2020
$26,688
2019
$87,048
2018
$18,840
Payments by company (2024)
Consulting
Speaking
Meals & Travel
Research
Janssen Pharmaceuticals, Inc
$4,860
ABIOMED
$261
Abbott Laboratories
$149
Impulse Dynamics (USA) Inc.
$143
Boehringer Ingelheim Pharmaceuticals, Inc.
$103
Medtronic, Inc.
$101
Philips North America LLC
$68
Boston Scientific Corporation
$43
AstraZeneca Pharmaceuticals LP
$35
Novartis Pharmaceuticals Corporation
$21
Lexicon Pharmaceuticals, Inc.
$16
Tactile Systems Technology Inc
$13
Bayer Healthcare Pharmaceuticals Inc.
$13
Top 3 companies account for 90.4% of 2024 payments
All-time payments by company (2018-2024) ›
Janssen Pharmaceuticals, Inc
$170,164
Boehringer Ingelheim Pharmaceuticals, Inc.
$61,160
Lilly USA, LLC
$13,365
Medtronic Vascular, Inc.
$1,661
ARALEZ PHARMACEUTICALS US INC.
$874
ABIOMED
$706
Abbott Laboratories
$636
Novartis Pharmaceuticals Corporation
$534
Boston Scientific Corporation
$483
Avinger Inc.
$395
AstraZeneca Pharmaceuticals LP
$262
Johnson & Johnson Health Care Systems Inc.
$240
Amgen Inc.
$235
Impulse Dynamics (USA) Inc.
$225
Medtronic, Inc.
$203
Vifor Pharma, Inc.
$200
Bard Peripheral Vascular, Inc.
$191
Merck Sharp & Dohme LLC
$152
ZOLL Services LLC (A/K/A ZOLL LifeCor Corp)
$141
SANOFI-AVENTIS U.S. LLC
$130
Philips North America LLC
$68
Cagent Vascular INC
$58
Astellas Pharma US Inc
$51
Bayer HealthCare Pharmaceuticals Inc.
$51
PFIZER INC.
$45
Tactile Systems Technology Inc
$44
Lexicon Pharmaceuticals, Inc.
$40
Esperion Therapeutics, Inc.
$40
BIOTRONIK INC.
$35
Novo Nordisk Inc
$33
Bardy Diagnostics, Inc.
$32
Janssen Scientific Affairs, LLC
$31
PORTOLA PHARMACEUTICALS, INC.
$30
Regeneron Healthcare Solutions, Inc.
$28
E.R. Squibb & Sons, L.L.C.
$27
Osprey Medical Inc
$27
Cardiovascular Systems Inc.
$26
Resmed Corp
$25
Kiniksa Pharmaceuticals, Ltd.
$24
AngioDynamics, Inc.
$22
ShockWave Medical, Inc
$21
Otsuka America Pharmaceutical, Inc.
$19
Actelion Pharmaceuticals US, Inc.
$18
Alnylam Pharmaceuticals Inc.
$17
Philips Electronics North America Corporation
$17
Bayer Healthcare Pharmaceuticals Inc.
$13
Baxter Healthcare
$13
ARBOR PHARMACEUTICALS, INC.
$12
Top 3 companies account for 96.8% of all-time payments
Associated products mentioned in payments ›
(5044) MCOT · AIR 11 · ANDEXXA · AURYON LASER SYSTEM 100-120 VAC · AVEIR · Adempas · BRILINTA · CardioMEMS HF System · Carnation Ambulatory Monitor · ClosureFast · Confirm Rx · Corlanor · DyeVert · ELIQUIS · EMBLEM SICD ELECTRODE DELIVERY SYSTEM · ENTRESTO · Edarbi · Ellipse ICD · FARXIGA · Flexitouch Plus · Fortify Assura · GALLANT · GENERAL TACHY · GENERAL TACHY · GENERAL THERAPIES · HeartWare HVAD · Hi-Torque Command guide wire · Hillrom - Carnation Ambulatory Monitor · INVOKANA · Impella · Inpefa · JARDIANCE · JETSTREAM SC · Kerendia · LATITUDE Communicator Power Supply · LEQVIO · LEXISCAN · LINQ II · LUTONIX · LUX-DX · LifeVest · MITRACLIP · MULTAQ · MYCARELINK · Merlin Connectivity and Remote · Micra · Mitra Clip system · NEXLETOL · ONPATTRO · OPSUMIT MACITENTAN · OPTIMIZER · Optimizer · Ozempic · PANTHERIS · PRADAXA · PRALUENT · PRALUENT ALIROCUMAB INJECTION · Pacemakers · Peripheral Orbital Atherectomy System · RESONATE · REVEAL LINQ · Ranger · Repatha · Reveal LINQ · Rybelsus · SAMSCA · SPRAVATO · Serrantor · VENASEAL · VERQUVO · VIGILANT · Vascular Lithotripsy · Veltassa · VenaSeal · Verquvo · WATCHMAN · WATCHMAN Access System · WATCHMAN FLX · 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 →
The majority of payments (93%) are for speaking programs and promotional activities, which reflect participation in industry-sponsored educational or marketing events. This is common in cardiovascular disease and does not inherently indicate bias, but patients may wish to be aware. Total industry engagement is in the top 3% for cardiovascular disease in CA.
Geographic Context
Cardiologists within 10 mi
36
Per 100K population
4.6
County median income
$88,531
Nearest hospital
ST JOSEPH'S MEDICAL CENTER OF STOCKTON
4.2 mi
4.2 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. Primack is a cardiac & electrophysiology specialist, with moderate Medicare volume, with speaking/promotional industry engagement in the top 3% of CA peers, 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. Primack experienced with office visit, established patient (30-39 min)?
Based on Medicare claims data, Dr. Primack performed 353 office visit, established patient (30-39 min) 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. Primack receive payments from pharmaceutical companies?
Yes. Dr. Primack received a total of $252,826 from 48 companies across 586 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. Primack's costs compare to other cardiologists in Stockton?
Dr. Primack's average Medicare payment per service is $86. 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. Primack) 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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