Medicare Enrolled
Dr. William Knopf, MD
Cardiovascular Disease · Macon, GA
Practice pattern: Remote & Cardiac
— Practice combining remote and cardiac services
Consulting-driven
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. Knopf 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. Knopf
Dr. William Knopf is a cardiovascular disease specialist in Macon, GA, with 21 years of NPI registration. Based on federal Medicare data, Dr. Knopf performed 19,680 Medicare services across 8,326 unique beneficiaries.
Between the years covered by Open Payments, Dr. Knopf received a total of $42,917 from 27 pharmaceutical and/or device companies across 128 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in cardiovascular disease. The majority of payments are for consulting, which typically reflects recognized clinical expertise sought by manufacturers. Patients may wish to discuss these relationships with their provider.
The Data Coverage level for Dr. Knopf 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.
✓ 21 years in practice
▲ Top 0% volume in GA
$42,917 industry payments
Medicare Practice Summary
Medicare Utilization ↗19,680
Medicare services
Top 0% in GA for cardiovascular disease
8,326
Unique beneficiaries
$53
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
~937 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 |
|---|---|---|---|
| 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. |
3,416 | $28 | $100 |
| Remote patient monitoring management, 20 min/month Management based on results from remote vital sign monitoring for the first 20 minutes per calendar month. |
2,866 | $35 | $100 |
| 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. |
2,264 | $33 | $100 |
| 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. |
2,052 | $88 | $206 |
| 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. |
1,422 | $10 | $92 |
| Regadenoson injection (Lexiscan) for heart stress test An injection of regadenoson, a medication used to stress the heart during diagnostic testing. |
1,288 | $42 | $155 |
| Echocardiogram, transthoracic An ultrasound of the heart that uses color to show blood flow, rate, direction, and valve function. |
1,147 | $134 | $1,400 |
| Technetium Tc-99m tetrofosmin diagnostic injection A diagnostic injection of Technetium Tc-99m tetrofosmin used for imaging studies. |
704 | $90 | $300 |
| Comprehensive metabolic blood panel A blood test that measures a group of chemicals, including glucose, electrolytes, and kidney and liver function markers. |
525 | $10 | $115 |
| 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. |
399 | $6 | $118 |
| 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. |
357 | $45 | $550 |
| 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. |
351 | $306 | $2,040 |
| Lipid panel (cholesterol and triglycerides) A blood test that measures cholesterol and triglyceride levels. |
333 | $13 | $75 |
| Complete blood count (CBC), automated An automated laboratory test that measures the levels of red blood cells, white blood cells, and platelets in the blood. |
289 | $6 | $25 |
| Chronic care management, first 20 min/month This service covers the first 20 minutes of clinical staff time directed by a healthcare professional each calendar month to manage chronic conditions. |
278 | $45 | $100 |
| Magnesium level test A blood test to measure the amount of magnesium in your body. This helps check for magnesium deficiency or excess. |
227 | $7 | $25 |
| 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. |
206 | $125 | $680 |
| Natriuretic peptide level test A blood test that measures the level of natriuretic peptide, a protein produced by the heart and blood vessels. |
173 | $38 | $200 |
| 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. |
161 | $58 | $175 |
| Continuous ECG monitoring, up to 30 days Continuous heart rhythm monitoring for up to 30 days, including professional review and reporting of the results. |
110 | $17 | $110 |
| Thyroid stimulating hormone (TSH) test A blood test that measures the level of thyroid stimulating hormone to evaluate thyroid function. |
100 | $16 | $100 |
| 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. |
97 | $75 | $298 |
| Chronic care management, additional 20 min/month This service covers an extra 20 minutes of clinical staff time directed by a healthcare professional for managing two or more chronic conditions each calendar month. |
97 | $35 | $100 |
| 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. |
93 | $10 | $62 |
| Cardiac catheterization | 76 | $185 | $2,520 |
| 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. |
75 | $60 | $117 |
| 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. |
70 | $126 | $354 |
| 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. |
66 | $10 | $75 |
| Complete blood count (CBC) with differential An automated laboratory test that measures the levels of red blood cells, white blood cells, and platelets in the blood, including a breakdown of the different types of white blood cells. |
50 | $8 | $30 |
| 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. |
49 | $120 | $276 |
| Basic metabolic blood panel A blood test that measures a group of basic chemicals, including total calcium levels. |
47 | $8 | $85 |
| 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. |
42 | $34 | $105 |
| Coronary stent placement A procedure to insert a stent into a coronary artery or its branch to keep it open, using balloon dilation during the process. |
37 | $409 | $2,768 |
| Hemoglobin A1c test (diabetes monitoring) A blood test that measures your average blood sugar levels over the past two to three months. |
32 | $10 | $50 |
| Complete ultrasound of abdomen and pelvis blood flow This procedure uses sound waves to create images of blood flow in the arteries and veins of the abdomen and pelvis. It evaluates the rate and direction of blood movement within these vessels. |
25 | $186 | $950 |
| 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. |
25 | $106 | $204 |
| Aminophylline injection, up to 250 mg Administration of aminophylline medication via injection for a dose of up to 250 mg. |
23 | $6 | $25 |
| Remote physiologic monitoring setup and education Initial setup of remote monitoring equipment and patient education on its use. |
20 | $13 | $50 |
| Follow-up heart ultrasound An ultrasound of the heart performed to monitor or reassess a previously identified condition or treatment progress. |
16 | $71 | $650 |
| Hospital follow-up visit, low complexity Follow-up hospital visit for an established patient with straightforward or low-level medical decision making. The visit requires at least 25 minutes of time spent on the day of service. |
15 | $38 | $92 |
| Complex chronic care management, first 60 minutes This service involves clinical staff time directed by a healthcare professional to manage two or more chronic conditions over a calendar month. It covers the first 60 minutes of this coordinated care effort. |
12 | $52 | $155 |
| Additional chronic care management time, 60 minutes This service covers an additional 60 minutes of clinical staff time directed by a healthcare professional for managing two or more chronic conditions, billed per calendar month. |
12 | $48 | $100 |
| Insertion of implantable heart rhythm monitor A small device is placed under the skin to continuously record the heart's electrical activity. This helps detect irregular heart rhythms that may not appear during a standard office visit. |
11 | $3,059 | $7,000 |
| Continuous ECG monitoring with symptom tracking, up to 30 days This procedure involves continuous electrocardiogram monitoring for up to 30 days. It includes symptom monitoring to correlate heart activity with patient-reported events. |
11 | $6 | $63 |
| Initial hospital admission, moderate complexity Initial hospital inpatient or observation care for a new patient involving moderate-level medical decision making, with at least 55 minutes total time on the date of the encounter. |
11 | $99 | $203 |
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.
6.4% high complexity
15.6% medium
78.0% routine
Industry Payment Transparency
Open Payments through 2024 ↗$42,917
Total received (2018-2024)
Avg $6,131/year across 7 years
Top 7% in GA for cardiovascular disease
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
27
Companies
128
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.
Consulting
Expert advisory fees, typically reflecting recognized clinical expertise
$40,000 (93.2%)
Meals & Travel
Food, beverages, travel, and lodging — typically low-value
$2,917 (6.8%)
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$347
2023
$341
2022
$275
2021
$294
2020
$40,319
2019
$239
2018
$1,100
Payments by company (2024)
Consulting
Speaking
Meals & Travel
Research
ZOLL Services LLC (A/K/A ZOLL LifeCor Corp)
$102
Novartis Pharmaceuticals Corporation
$80
Philips North America LLC
$32
Vital Connect, Inc
$30
Inari Medical, Inc.
$23
CVRx, Inc.
$22
Chiesi USA, Inc.
$22
E.R. Squibb & Sons, L.L.C.
$19
Boston Scientific Corporation
$16
Top 3 companies account for 61.9% of 2024 payments
All-time payments by company (2018-2024) ›
Semler Scientific, Inc.
$40,000
ZOLL Services LLC (A/K/A ZOLL LifeCor Corp)
$674
Corindus Inc.
$526
Novartis Pharmaceuticals Corporation
$247
AstraZeneca Pharmaceuticals LP
$240
Medtronic Vascular, Inc.
$197
E.R. Squibb & Sons, L.L.C.
$163
Abbott Laboratories
$163
Boston Scientific Corporation
$108
Janssen Pharmaceuticals, Inc
$76
PFIZER INC.
$59
Cardiovascular Systems Inc.
$58
Philips Electronics North America Corporation
$56
CVRx, Inc.
$47
Medtronic, Inc.
$44
Chiesi USA, Inc.
$36
Philips North America LLC
$32
Vital Connect, Inc
$30
EKOS Corporation
$24
Inari Medical, Inc.
$23
Boehringer Ingelheim Pharmaceuticals, Inc.
$23
Merck Sharp & Dohme Corporation
$21
G Medical Diagnostic Services, Inc.
$16
Amarin Pharma Inc.
$15
Edwards Lifesciences Corporation
$14
Amgen Inc.
$13
Astellas Pharma US Inc
$12
Top 3 companies account for 96.0% of all-time payments
Associated products mentioned in payments ›
(5091) Amb Mon & Diag Und · (7999) SRC Undivided · (CK4) MCOT · BRILINTA · Barostim Neo System · CAMZYOS · CARDIOMEMS · CLEVIPREX · CT THROMBECTOMY SYSTEM KIT · Cardiac Monitoring Suite · CardioMEMS HF System · ClosureFast · Confirm Rx · Coronary Orbital Atherectomy System · Diamondback Coronary · Diamondback Peripheral · EKOSONIC · ELIQUIS · ENTRESTO · Edwards SAPIEN 3 Transcatheter Heart Valve · FARXIGA · JARDIANCE · KENGREAL · LATITUDE Communicator Power Supply · LEQVIO · LUX-Dx Insertable Cardiac Monitor · Lexiscan · LifeVest · Peripheral Orbital Atherectomy System · RESONATE · Repatha · Resolute · Reveal LINQ · THORATEC HEARTMATE 3 LVAS IMPLANT KIT · VENASEAL · VERQUVO · VITALPATCH RTM · VYNDAQEL · Vascepa · WATCHMAN Access System · 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 →
The majority of payments (93%) are consulting fees, which typically reflect recognized clinical expertise sought by manufacturers. Total industry engagement is in the top 7% for cardiovascular disease in GA.
Geographic Context
Cardiologists within 10 mi
22
Per 100K population
14.1
County median income
$50,747
Nearest hospital
PIEDMONT MACON NORTH HOSPITAL
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. Knopf is a remote & cardiac specialist, with above-average Medicare volume (top 0% in GA), with consulting-driven industry engagement in the top 7% of GA peers, with 21 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. Knopf experienced with remote vital sign monitoring management, each additional 20 minutes?
Based on Medicare claims data, Dr. Knopf performed 3,416 remote vital sign monitoring management, each additional 20 minutes 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. Knopf receive payments from pharmaceutical companies?
Yes. Dr. Knopf received a total of $42,917 from 27 companies across 128 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. Knopf's costs compare to other cardiologists in Macon?
Dr. Knopf's average Medicare payment per service is $53. 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. Knopf) 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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