Medicare Enrolled
Dr. John Hammock, M.D.
Internal Medicine · Quincy, IL
Practice pattern: Remote & Electrophysiology
— Practice combining remote and electrophysiology services
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. Hammock 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. Hammock
Dr. John Hammock is an internal medicine specialist in Quincy, IL, with 19 years of NPI registration. Based on federal Medicare data, Dr. Hammock performed 4,595 Medicare services across 2,359 unique beneficiaries.
Between the years covered by Open Payments, Dr. Hammock received a total of $18,728 from 20 pharmaceutical and/or device companies across 319 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. Hammock 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 5% volume in IL
$18,728 industry payments
Medicare Practice Summary
Medicare Utilization ↗4,595
Medicare services
Top 5% in IL for internal medicine
2,359
Unique beneficiaries
$40
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
~242 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 |
|---|---|---|---|
| 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. |
1,140 | $6 | $22 |
| 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. |
698 | $22 | $84 |
| 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. |
671 | $19 | $68 |
| Remote monitoring of implantable heart device, up to 30 days Remote evaluation of an implanted heart or blood vessel monitoring system over a period of up to 30 days. |
600 | $19 | $65 |
| Remote evaluation of implantable defibrillator system Remote assessment of a single, dual, or multiple lead implantable defibrillator system within 90 days of the previous evaluation. |
300 | $26 | $167 |
| 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. |
228 | $74 | $203 |
| 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. |
205 | $11 | $47 |
| 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. |
147 | $52 | $137 |
| Pacemaker system evaluation Assessment of a pacemaker device, including single, dual, multiple lead, or leadless systems. |
83 | $37 | $135 |
| Echocardiogram, transthoracic An ultrasound of the heart that uses color to show blood flow, rate, direction, and valve function. |
80 | $46 | $180 |
| Atrial fibrillation ablation with pulmonary vein isolation A procedure to treat atrial fibrillation by mapping the heart's electrical activity and destroying tissue causing irregular contractions. This is done by isolating the pulmonary veins using catheter-based destruction. |
58 | $771 | $2,909 |
| External EKG monitoring, 8-15 days Continuous external electrocardiogram recording and review over a period of 8 to 15 days to monitor heart rhythm. |
57 | $20 | $69 |
| 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. |
51 | $102 | $316 |
| Follow-up heart ultrasound An ultrasound of the heart performed to monitor or reassess a previously identified condition or treatment progress. |
38 | $19 | $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. |
36 | $104 | $266 |
| Repair of left upper heart chamber with implant A surgical procedure to repair the left upper chamber of the heart using an implanted device, with review by a radiologist. |
27 | $608 | $2,434 |
| 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. |
26 | $63 | $139 |
| 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. |
22 | $57 | $205 |
| 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. |
22 | $114 | $273 |
| Permanent leadless pacemaker insertion A small, self-contained pacemaker is placed directly into the heart without using wires. The procedure is guided by imaging to ensure correct positioning. |
19 | $377 | $1,485 |
| Pacemaker programming, dual lead system Adjustment and configuration of a dual-lead pacemaker device to ensure proper operation and settings. |
19 | $24 | $99 |
| Pacemaker insertion with heart chamber electrodes A surgical procedure to implant a pacemaker device and place electrodes into the upper and lower chambers of the heart to regulate heart rhythm. |
17 | $406 | $1,573 |
| Implantable defibrillator system check A check of the implanted defibrillator device to ensure it is functioning correctly. This evaluation covers single, dual, or multiple lead systems. |
17 | $43 | $172 |
| Heart rhythm stimulator programming after drug infusion Adjustment of a heart rhythm stimulation device following a drug infusion. This procedure involves reprogramming the device settings to ensure proper function after the medication has been administered. |
12 | $65 | $422 |
| Removal and replacement of dual lead permanent pacemaker This procedure involves removing an existing permanent pacemaker with two leads and replacing it with a new device. It is performed to update or repair the heart rhythm management system. |
11 | $285 | $1,045 |
| Hospital discharge day management, 30 minutes or less This service covers the final day of hospital care when the patient is being discharged. It includes coordination of care and instructions for the patient within a time frame of 30 minutes or less. |
11 | $64 | $138 |
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.
28.6% high complexity
0.8% medium
70.6% routine
Industry Payment Transparency
Open Payments through 2024 ↗$18,728
Total received (2018-2024)
Avg $2,675/year across 7 years
Top 4% in IL for internal medicine
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
20
Companies
319
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
$18,728 (100.0%)
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$401
2023
$2,761
2022
$798
2021
$473
2020
$1,118
2019
$4,924
2018
$8,254
Payments by company (2024)
Consulting
Speaking
Meals & Travel
Research
Abbott Laboratories
$199
Biosense Webster, Inc.
$136
ABIOMED
$51
SANOFI-AVENTIS U.S. LLC
$14
Top 3 companies account for 96.4% of 2024 payments
All-time payments by company (2018-2024) ›
Medtronic Vascular, Inc.
$7,256
Medical Device Business Services, Inc.
$7,089
Biosense Webster, Inc.
$1,457
Medtronic, Inc.
$1,455
Abbott Laboratories
$524
Boston Scientific Corporation
$308
ZOLL Services LLC (A/K/A ZOLL LifeCor Corp)
$124
SANOFI-AVENTIS U.S. LLC
$86
Novartis Pharmaceuticals Corporation
$71
Philips Electronics North America Corporation
$65
AstraZeneca Pharmaceuticals LP
$65
ABIOMED
$51
E.R. Squibb & Sons, L.L.C.
$38
Astellas Pharma US Inc
$31
HeartFlow, Inc.
$25
iRhythm Technologies, Inc.
$23
Cardinal Health 200, LLC
$19
PFIZER INC.
$15
Cardiovascular Systems Inc.
$13
Amgen Inc.
$12
Top 3 companies account for 84.4% of all-time payments
Associated products mentioned in payments ›
AMPLATZER AMULET · AMPLATZER Occluders · AMPLIA MRI QUAD CRT-D SURESCAN · ARCTIC FRONT ADVANCE · AZURE XT DR MRI SURESCAN · Amplia MRI · Arctic Front · Azure · BRILINTA · CAPSUREFIX NOVUS MRI SURESCAN · CARTO 3 · CLARIA MRI QUAD CRT-D SURESCAN · COBALT DR MRI SURESCAN · CardioMEMS HF System · CareLink · Carto 3 · Carto 3 System · Carto Smarttouch · CartoSound · Claria MRI · Cobalt · Concerto · Confidense · Corlanor · Coronary Orbital Atherectomy System · CryoConsole · DiamondTemp · ELIQUIS · ENTRESTO · EVERA MRI XT DR SURESCAN · FFRct · Generators · HAWKONE · Impella · JOT DX · LEQVIO · LEXISCAN · LINQ II · Lasers · LifeVest · MICRA · MULTAQ · Micra · MynxGrip Vascular Closure Device · NA · OCTARAY MAPPING CATHETER · PENTARAY · PRALUENT · Perclose ProStyle · PressureWire FFR · QDOT MICRO Catheter · SelectSecure · SmartAblateTM System RF Generator · Smartablate · Soundstar · VersaCross Access Solution · Viance · Visitag · WATCHMAN Access System · WATCHMAN FLX · Xience Sierra Coronary Stent · Xience Sierra Coronary Stent System · ZIO Patch
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 (100%) are for meals and travel — low-value interactions that are common across virtually all practicing physicians. Total industry engagement is in the top 4% for internal medicine in IL.
Geographic Context
Internal medicine physicians within 10 mi
54
Per 100K population
82.9
County median income
$64,962
Nearest hospital
BLESSING 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. Hammock is a remote & electrophysiology specialist, with above-average Medicare volume (top 5% in IL), with low-engagement industry engagement in the top 4% of IL 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. Hammock experienced with ekg interpretation and report?
Based on Medicare claims data, Dr. Hammock performed 1,140 ekg interpretation and report 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. Hammock receive payments from pharmaceutical companies?
Yes. Dr. Hammock received a total of $18,728 from 20 companies across 319 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. Hammock's costs compare to other internal medicine physicians in Quincy?
Dr. Hammock's average Medicare payment per service is $40. 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. Hammock) 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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