Medicare Enrolled
Dr. An Bui, M.D.
Internal Medicine · Boston, MA
Practice pattern: Electrophysiology & Remote
— Practice combining electrophysiology and remote services
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. Bui 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. Bui
Dr. An Bui is an internal medicine specialist in Boston, MA, with 16 years of NPI registration. Based on federal Medicare data, Dr. Bui performed 4,249 Medicare services in 2023. These records do not provide a deduplicated patient total.
Between the years covered by Open Payments, Dr. Bui received a total of $16,493 from 34 pharmaceutical and/or device companies across 196 payment records. A record can group multiple payments. These transfers are publicly reported through CMS Open Payments. Disclosure alone does not establish their effect on care. A reliable breakdown by payment category is not available in this snapshot. Patients may wish to discuss these relationships with their provider.
The Data Coverage level for Dr. Bui 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.
✓ 16 years of NPI registration
▲ Top 4% volume in MA
$16,493 industry payments
Medicare Practice Summary — 2023
Medicare Utilization ↗4,249
Medicare services
Top 4% in MA for internal medicine
Not available
Unique patients (not deduplicated)
$97
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
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. |
711 | $6 | $28 |
| 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. |
323 | $23 | $108 |
| 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. |
274 | $18 | $87 |
| 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. |
259 | $74 | $286 |
| Heart chamber tissue destruction via catheter A procedure that destroys tissue in the upper heart chamber using a tube to treat abnormal heart rhythm. |
226 | $238 | $865 |
| 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. |
209 | $108 | $377 |
| 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. |
189 | $26 | $211 |
| Pacemaker programming, dual lead system Adjustment and configuration of a dual-lead pacemaker device to ensure proper operation and settings. |
178 | $25 | $70 |
| New patient office visit, complex (60-74 min) | 163 | $134 | $544 |
| 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. |
157 | $20 | $79 |
| 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. |
151 | $65 | $490 |
| 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. |
118 | $727 | $2,307 |
| Pacemaker system evaluation Assessment of a pacemaker device, including single, dual, multiple lead, or leadless systems. |
111 | $14 | $57 |
| Catheter ablation for abnormal heart rhythm A procedure where catheters are inserted to destroy tissue causing irregular heartbeats. |
110 | $236 | $865 |
| Left heart catheterization with pacing and arrhythmia induction A procedure where catheters are inserted to record electrical activity and pace the left lower chamber of the heart. It also involves intentionally inducing an abnormal heart rhythm for diagnostic purposes. |
107 | $131 | $528 |
| 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. |
99 | $133 | $572 |
| 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. |
78 | $10 | $36 |
| Ultrasound of heart blood vessels with radiologist review An ultrasound exam that evaluates blood vessels within the heart, including a review of the results by a radiologist. |
72 | $58 | $459 |
| 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. |
67 | $101 | $448 |
| 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. |
66 | $89 | $297 |
| External shock to heart to regulate heart beat A procedure that delivers an electric shock to the heart from outside the body to restore a normal heart rhythm. |
63 | $84 | $395 |
| Evaluation of implantable heart and blood vessel monitoring system This procedure involves checking the function and data of an implanted device used to monitor heart and blood vessel activity. |
48 | $16 | $38 |
| 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. |
46 | $600 | $2,446 |
| External EKG monitoring, 8-15 days Continuous external electrocardiogram recording and review over a period of 8 to 15 days to monitor heart rhythm. |
43 | $21 | $52 |
| Programming of multiple lead implantable defibrillator system Adjustment and testing of the settings for an implanted heart device with multiple leads to ensure proper function. |
42 | $40 | $113 |
| Continuous EKG monitoring review, 48-7 days Review and interpretation of continuous external EKG recordings lasting more than 48 hours up to 7 days. |
37 | $19 | $47 |
| 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. |
34 | $26 | $130 |
| 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. |
33 | $398 | $1,629 |
| Pacemaker programming, single lead Adjustment and testing of a single-lead pacemaker to ensure it functions correctly. |
32 | $18 | $59 |
| 2-day continuous ECG with professional review A two-day continuous electrocardiogram recording that includes a review by a healthcare professional. |
27 | $13 | $65 |
| Programming of dual lead implantable defibrillator system Adjustment and testing of the settings for an implanted heart device with two leads to ensure proper function. |
25 | $40 | $121 |
| 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. |
19 | $60 | $207 |
| 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. |
18 | $54 | $275 |
| 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 | $25 | $75 |
| Radiofrequency ablation for supraventricular tachycardia A procedure to locate and destroy abnormal heart tissue in the upper chambers of the heart that causes a rapid heart rate. |
18 | $644 | $1,729 |
| Insertion of implantable defibrillator system A surgical procedure to place an implantable cardioverter-defibrillator (ICD) device into the body. The device is connected to the heart to monitor heart rhythm and deliver shocks if dangerous arrhythmias occur. |
14 | $704 | $2,830 |
| Heart catheterization to identify abnormal heart rhythm A tube is inserted into the heart chambers to record electrical activity and locate the source of an irregular heartbeat. |
14 | $213 | $857 |
| Heart rhythm ablation for ventricular tachycardia A procedure to locate and destroy abnormal heart tissue in the lower chambers that causes rapid or irregular heartbeats. This is done using a catheter during an electrophysiologic evaluation. |
14 | $788 | $2,307 |
| Pacemaker system programming Adjustment and testing of a multi-lead pacemaker to ensure proper function and settings. |
13 | $26 | $82 |
| 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. |
12 | $103 | $388 |
| Insertion of left lower heart electrode for pacemaker or defibrillator A procedure to place an electrode in the lower part of the left side of the heart. This electrode is used to connect a pacemaker or defibrillator to help regulate the heart's rhythm. |
11 | $362 | $1,430 |
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. These counts do not measure clinical quality or years of experience.
41.9% high complexity
1.7% medium
56.4% routine
Industry Payment Transparency
Open Payments through 2024 ↗$16,493
Total received (2018-2024)
Avg $2,356/year across 7 years
Top 9% in MA for internal medicine
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
34
Companies
196
Payment records
Payments are publicly reported; disclosure does not establish legality · Not evidence of wrongdoing · How to interpret →
Payment categories are unavailable while the source breakdown is being rebuilt. Company and year totals do not identify how much belongs to each category.
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$7,247
2023
$1,706
2022
$2,689
2021
$364
2020
$2,408
2019
$40
2018
$2,039
Payments by company (2024)
Medtronic, Inc.
$3,492
Boston Scientific Corporation
$2,186
Biosense Webster, Inc.
$735
Abbott Laboratories
$459
Impulse Dynamics (USA) Inc.
$92
iRhythm Technologies, Inc.
$92
ZOLL Services LLC (A/K/A ZOLL LifeCor Corp)
$58
CARDIVA MEDICAL, INC.
$31
Actelion Pharmaceuticals US, Inc.
$25
Novo Nordisk Inc
$23
MEDICOMP INC
$19
CVRx, Inc.
$18
SCPHARMACEUTICALS INC.
$17
Top 3 companies account for 88.5% of 2024 payments
All-time payments by company (2018-2024) ›
Medtronic, Inc.
$3,745
Medtronic Vascular, Inc.
$3,694
Boston Scientific Corporation
$2,859
Biosense Webster, Inc.
$1,963
Medical Device Business Services, Inc.
$1,348
Abbott Laboratories
$647
iRhythm Technologies, Inc.
$428
Philips Electronics North America Corporation
$317
Impulse Dynamics (USA) Inc.
$251
ZOLL Services LLC (A/K/A ZOLL LifeCor Corp)
$202
Novartis Pharmaceuticals Corporation
$186
BOSTON SCIENTIFIC CORPORATION
$144
Itamar Medical Inc
$119
Amgen Inc.
$96
Boehringer Ingelheim Pharmaceuticals, Inc.
$69
CARDIVA MEDICAL, INC.
$60
Janssen Pharmaceuticals, Inc
$31
Merck Sharp & Dohme LLC
$27
AltaThera Pharmaceuticals LLC
$26
Actelion Pharmaceuticals US, Inc.
$25
Kestra Medical Technology Services, Inc.
$24
Novo Nordisk Inc
$23
Organogenesis Inc.
$21
PFIZER INC.
$21
Alexion Pharmaceuticals, Inc.
$21
MEDICOMP INC
$19
Vital Connect, Inc
$19
Esperion Therapeutics, Inc.
$18
CVRx, Inc.
$18
SCPHARMACEUTICALS INC.
$17
AtriCure, Inc.
$14
Aziyo Biologics, Inc.
$14
E.R. Squibb & Sons, L.L.C.
$13
Alnylam Pharmaceuticals Inc.
$13
Top 3 companies account for 62.4% of all-time payments
Associated products mentioned in payments ›
AURORA EV-ICD MRI SURESCAN · AZURE XT DR MRI SURESCAN · Advisor Catheter · Andexxa · Arctic Front · Assure WCD · Azure · Barostim Neo System · BodyGuardian · Bridge · CAMZYOS · CARDIVA VASCADE MVP VVCS 6-12F · CARTO 3 · COBALT DR MRI SURESCAN · Carto 3 · Carto 3 System · Claria MRI · Confirm Rx · ECM Patch · ELIQUIS · ENTRESTO · EPI-SENSE GUIDED COAGULATION SYS · EVERA MRI XT DR SURESCAN · EnSite X · Evera · FUROSCIX · GENERAL THERAPIES · General - Therapies · LEQVIO · LifeVest · MICRA · MYCARELINK · Micra · MitraClip System · NA · NEXLETOL · NUVISION ICE CATHETER · ONPATTRO · Optimizer · Ozempic · PERCLOSE PROGLIDE · PERCLOSE PROSTYLE · PULSESELECT · Pouch · Puraply · QDOT MICRO Catheter · Repatha · SYMPLICITY G3 · Sotalol Hydrochloride · TELEPATCH CARDIAC MONITOR · UPTRAVI · VERQUVO · VITALPATCH RTM · WATCHMAN · WATCHMAN Access System · WATCHMAN FLX · WatchPATONE · XARELTO · ZIO XT Patch · ZOOM Wireless Transmitter
Should you be concerned? Industry payments are disclosed through CMS Open Payments. Disclosure alone does not establish their purpose, legality, or effect on care. 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 →
Geographic Context
Internal medicine physicians in nearby ZIP areas
5,579
County median income
$92,859
Nearest hospital to ZIP centroid (approximate)
BRIGHAM AND WOMEN'S HOSPITAL
0.0 mi
0.0 mi
Data Sources
| Provider Registry | ✓ NPPES | NPPES snapshot; verify current record |
| Medicare Enrollment | ✓ PECOS | PECOS snapshot |
| Practice Data | ✓ Medicare Util. | Annual (CY lag) |
| Industry Payments | ✓ Open Payments | CY 2024 |
| Disciplinary History | — Not included | 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. Bui is an electrophysiology & remote specialist, with above-average Medicare volume (top 4% in MA), with 16 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. Bui experienced with ekg interpretation and report?
Based on Medicare claims data, Dr. Bui performed 711 ekg interpretation and report services. These records cover Medicare fee-for-service activity, including eligible younger beneficiaries; they do not measure total practice volume or clinical quality.
Does Dr. Bui receive payments from pharmaceutical companies?
Yes. Dr. Bui received a total of $16,493 from 34 companies across 196 payment records. A record can group multiple payments. These transfers are publicly disclosed through CMS Open Payments. Disclosure alone does not establish their legality or effect on care. 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. Bui's costs compare to other internal medicine physicians in Boston?
Dr. Bui's average Medicare payment per service is $97. 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. Bui) 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 the presence of registry, enrollment, activity or payment records, not verified experience or clinical quality. 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?
Source publication dates and the snapshots loaded on this site can differ. Rebuilding a page does not refresh its source records. Check the Medicare reporting year and the payment interval shown above; consult the linked official sources for newer releases and current registry details. See our data freshness policy →
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About this page
This page combines public CMS records with calculated summaries and explanatory procedure labels. These transformations are not verbatim federal records. Sources: 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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