Medicare Enrolled
Dr. Richard Chang, M.D.
Internal Medicine · Walnut Creek, CA
Practice pattern: Remote & Electrophysiology
— Practice combining remote and electrophysiology 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. Chang 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. Chang
Dr. Richard Chang is an internal medicine specialist in Walnut Creek, CA, with 19 years of NPI registration. Based on federal Medicare data, Dr. Chang performed 7,692 Medicare services in 2023. These records do not provide a deduplicated patient total.
Between the years covered by Open Payments, Dr. Chang received a total of $135,067 from 79 pharmaceutical and/or device companies across 1264 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. Chang 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 of NPI registration
▲ Top 4% volume in CA
$135,067 industry payments
Medicare Practice Summary — 2023
Medicare Utilization ↗7,692
Medicare services
Top 4% in CA for internal medicine
Not available
Unique patients (not deduplicated)
$71
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 |
|---|---|---|---|
| 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. |
1,127 | $72 | $138 |
| 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. |
1,037 | $22 | $83 |
| 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. |
718 | $6 | $26 |
| 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. |
693 | $156 | $406 |
| 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. |
523 | $13 | $106 |
| 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. |
466 | $106 | $305 |
| Remote pacemaker/defibrillator monitoring, 90 days Remote evaluation of a pacemaker or implantable defibrillator system within 90 days of the last check. |
460 | $24 | $140 |
| 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. |
380 | $27 | $138 |
| Echocardiogram, transthoracic An ultrasound of the heart that uses color to show blood flow, rate, direction, and valve function. |
329 | $117 | $536 |
| 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. |
230 | $11 | $175 |
| 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. |
151 | $107 | $347 |
| 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. |
144 | $70 | $222 |
| 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. |
138 | $22 | $112 |
| Pacemaker programming, dual lead system Adjustment and configuration of a dual-lead pacemaker device to ensure proper operation and settings. |
135 | $80 | $203 |
| New patient office visit, complex (60-74 min) | 87 | $198 | $569 |
| 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. |
85 | $33 | $247 |
| Cardiac catheterization | 79 | $190 | $949 |
| Stress echocardiogram with ECG monitoring An ultrasound of the heart performed while monitoring heart rhythm during rest, exercise, or medication-induced stress, followed by a review and report of the findings. |
78 | $228 | $897 |
| 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. |
77 | $153 | $585 |
| Follow-up heart ultrasound An ultrasound of the heart performed to monitor or reassess a previously identified condition or treatment progress. |
71 | $44 | $156 |
| 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. |
65 | $187 | $706 |
| Remote monitoring of pulmonary artery pressure sensor This procedure involves the remote tracking of pressure readings from a sensor in the pulmonary artery over a period of up to 30 days. |
55 | $49 | $122 |
| 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. |
55 | $195 | $805 |
| Ultrasound of heart blood vessel or graft An ultrasound exam to evaluate blood flow in a heart blood vessel or graft, including a radiologist's review of the initial vessel. |
43 | $80 | $265 |
| Continuous EKG monitoring review, 48-7 days Review and interpretation of continuous external EKG recordings lasting more than 48 hours up to 7 days. |
40 | $21 | $162 |
| Pacemaker system evaluation Assessment of a pacemaker device, including single, dual, multiple lead, or leadless systems. |
38 | $58 | $170 |
| 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. |
31 | $105 | $384 |
| 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. |
27 | $438 | $3,399 |
| Insertion of tube in right and left heart chambers and coronary artery for diagnosis with review by radiologist | 27 | $287 | $1,151 |
| Continuous external EKG monitoring, 48 hours to 7 days This procedure involves recording the heart's electrical activity continuously using an external device for a period exceeding 48 hours but not more than 7 days. |
25 | $13 | $280 |
| Transcatheter aortic valve replacement via femoral artery A minimally invasive procedure to replace a diseased aortic heart valve using a catheter inserted through the skin and femoral artery. |
24 | $633 | $3,709 |
| 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. |
23 | $440 | $2,648 |
| External EKG monitoring, 8-15 days Continuous external electrocardiogram recording and review over a period of 8 to 15 days to monitor heart rhythm. |
23 | $24 | $163 |
| 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. |
21 | $12 | $43 |
| 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. |
21 | $95 | $948 |
| 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. |
20 | $18 | $70 |
| 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. |
20 | $12 | $61 |
| Continuous external EKG monitoring, 8-15 days This procedure involves recording heart rhythm continuously using an external EKG device over a period of 8 to 15 days. |
16 | $13 | $280 |
| 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. |
16 | $75 | $288 |
| 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. |
14 | $147 | $461 |
| Telephone medical discussion, 21-30 minutes A telephone conversation with a physician lasting between 21 and 30 minutes. This code covers the time spent discussing medical matters over the phone. |
14 | $89 | $305 |
| 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. |
11 | $807 | $3,736 |
| Stent placement and plaque removal in one vessel A procedure to clear plaque and blood clots from a single blood vessel, followed by the insertion of a stent and/or balloon dilation to keep the vessel open. |
11 | $553 | $3,399 |
| Transesophageal echocardiogram An ultrasound of the heart performed using a probe inserted into the esophagus to obtain detailed images of heart structures and function. |
11 | $96 | $292 |
| Echocardiogram, transthoracic An ultrasound test that uses sound waves to create images of the heart's blood flow, valves, and chambers. |
11 | $16 | $56 |
| Echocardiogram with color Doppler An ultrasound of the heart that uses color imaging to visualize blood flow, measure flow rate, and assess valve function. |
11 | $3 | $14 |
| 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. |
11 | $239 | $895 |
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.
21.4% high complexity
4.4% medium
74.2% routine
Industry Payment Transparency
Open Payments through 2024 ↗$135,067
Total received (2018-2024)
Avg $19,295/year across 7 years
Top 2% in CA for internal medicine
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
79
Companies
1,264
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
$10,765
2023
$20,886
2022
$26,775
2021
$39,429
2020
$14,998
2019
$8,438
2018
$13,776
Payments by company (2024)
Boehringer Ingelheim Pharmaceuticals, Inc.
$3,808
Lilly USA, LLC
$2,031
BIOTRONIK INC.
$1,017
ABIOMED
$880
Edwards Lifesciences Corporation
$608
Abbott Laboratories
$306
ZOLL Services LLC (A/K/A ZOLL LifeCor Corp)
$304
Boston Scientific Corporation
$268
Novo Nordisk Inc
$173
Philips North America LLC
$140
AstraZeneca Pharmaceuticals LP
$136
Merck Sharp & Dohme LLC
$121
Inari Medical, Inc.
$118
ATRICURE, INC.
$97
Esperion Therapeutics, Inc.
$96
Lexicon Pharmaceuticals, Inc.
$95
INTUITIVE SURGICAL, INC.
$72
Kiniksa Pharmaceuticals International, plc
$68
E.R. Squibb & Sons, L.L.C.
$57
Actelion Pharmaceuticals US, Inc.
$52
Amgen Inc.
$44
Janssen Pharmaceuticals, Inc
$38
PFIZER INC.
$33
SANOFI-AVENTIS U.S. LLC
$30
Kestra Medical Technology Services, Inc.
$28
Novartis Pharmaceuticals Corporation
$27
Medtronic, Inc.
$25
Siemens Medical Solutions USA, Inc.
$24
iRhythm Technologies, Inc.
$21
Bayer Healthcare Pharmaceuticals Inc.
$18
HEARTFLOW, INC.
$17
Alnylam Pharmaceuticals Inc.
$15
Top 3 companies account for 63.7% of 2024 payments
All-time payments by company (2018-2024) ›
Boehringer Ingelheim Pharmaceuticals, Inc.
$65,839
Lilly USA, LLC
$21,071
BIOTRONIK INC.
$14,019
Abbott Laboratories
$7,177
ABIOMED
$2,429
Edwards Lifesciences Corporation
$1,995
Janssen Pharmaceuticals, Inc
$1,559
Shockwave Medical, Inc
$1,535
Corindus Inc.
$1,314
ZOLL Services LLC (A/K/A ZOLL LifeCor Corp)
$1,246
Novo Nordisk Inc
$1,191
Impulse Dynamics (USA) Inc.
$1,189
AstraZeneca Pharmaceuticals LP
$1,043
Amgen Inc.
$944
Novartis Pharmaceuticals Corporation
$889
Penumbra, Inc.
$798
Actelion Pharmaceuticals US, Inc.
$773
Boston Scientific Corporation
$730
Medtronic Vascular, Inc.
$636
AltaThera Pharmaceuticals LLC
$600
E.R. Squibb & Sons, L.L.C.
$593
PFIZER INC.
$582
Terumo Medical Corporation
$517
Amarin Pharma Inc.
$506
Siemens Medical Solutions USA, Inc.
$487
ShockWave Medical, Inc
$476
SANOFI-AVENTIS U.S. LLC
$429
Merck Sharp & Dohme LLC
$375
Esperion Therapeutics, Inc.
$334
HeartFlow, Inc.
$239
Opsens Inc.
$231
CathWorks, Inc.
$220
Gilead Sciences, Inc.
$195
ATRICURE, INC.
$190
Philips Electronics North America Corporation
$166
Medtronic, Inc.
$163
Inari Medical, Inc.
$155
Kestra Medical Technology Services, Inc.
$145
Regeneron Healthcare Solutions, Inc.
$143
Philips North America LLC
$140
Allergan Inc.
$111
Lexicon Pharmaceuticals, Inc.
$95
Aziyo Biologics, Inc.
$92
Bayer HealthCare Pharmaceuticals Inc.
$88
CORDIS US CORP.
$86
CARDIVA MEDICAL, INC.
$77
INTUITIVE SURGICAL, INC.
$72
iRhythm Technologies, Inc.
$71
Lundbeck LLC
$71
Kiniksa Pharmaceuticals International, plc
$68
Bardy Diagnostics, Inc.
$65
Braemar Manufacturing, LLC
$63
MEDELA LLC
$60
BOSTON SCIENTIFIC CORPORATION
$59
Alnylam Pharmaceuticals Inc.
$58
Teleflex LLC
$56
ACELL, INC.
$54
Baxter Healthcare
$50
CVRx, Inc.
$50
Preventice Services, LLC
$42
Bayer Healthcare Pharmaceuticals Inc.
$37
AngioDynamics, Inc.
$36
Medicure Pharma Inc.
$31
LifeWatch Services Inc
$30
AtriCure, Inc.
$29
Daiichi Sankyo Inc.
$24
PORTOLA PHARMACEUTICALS, INC.
$23
Kiniksa Pharmaceuticals, Ltd.
$21
EKOS Corporation
$21
Arrow International, Inc.
$21
Merck Sharp & Dohme Corporation
$20
Kowa Pharmaceuticals America, Inc.
$20
BARD PERIPHERAL VASCULAR, INC.
$18
Inspire Medical Systems, Inc.
$18
HEARTFLOW, INC.
$17
Cardinal Health 200, LLC
$14
LivaNova USA, Inc.
$14
Invuity, Inc.
$12
Davol Inc.
$12
Top 3 companies account for 74.7% of all-time payments
Associated products mentioned in payments ›
(5044) MCOT · 3F · AMPLATZER · AMPLATZER AMULET · AMVIA EDGE · AMVUTTRA · ARTIS icono biplane · ASSURITY · ATRICLIP LAA EXCLUSION SYSTEM · AVVIGO Guidance System · Acticor · Acticor 7 VR-T DX · Adempas · AngioVac · Arcalyst · Assure WCD · Assurity Pacemaker · BEVYXXA · BG Mini Plus · BIOMONITOR · BRILINTA · BYSTOLIC · Barostim Neo System · BioMonitor · BodyGuardian · CAMZYOS · CARDIOMEMS · CHANTIX · COREVALVE EVOLUT R · COVERA · CRM-Research only · Cardiac Monitoring Suite · CardioMEMS HF System · Carnation Ambulatory Monitor · Catheter - GuideLiner · Cios Alpha · ClosureFast · CorPath GRX · CorPath Imaging System · CoreValve Evolut · Corlanor · Da Vinci Surgical System · ECM Patch · EDWARDS SAPIEN 3 TRANSCATHETER HEART VALVE (THV) · EKOSONIC · ELIQUIS · EMBLEM · EMGALITY · ENTRESTO · EPI-SENSE GUIDED COAGULATION SYSTEM WITH VISITRAX · Edora · Edora 8 DR-T · Edwards SAPIEN 3 Transcatheter Heart Valve · Edwards SAPIEN 3 Ultra Transcatheter Heart Valve · FARXIGA · FASENRA · FFRANGIO · FFRangio · FFRangio System · FFRct · FLOWTRIEVER CATHETER · GALLANT · GENERAL - VASCULAR INTERVENTION · GLIDEWIRE · HEARTRAIL · HeartMate · HeartMate 3 Left Ventricular Dev · Hillrom - Cardiac Ambulatory Monitor · IGT D Coronary · IGT_D Systems · IGT_D Therapy · INJECTAFER · INSPIRE · INSPIRIS RESILIA AORTIC VALVE · Impella · Indigo · Indigo System · Infinity DBS Pulse Generators · JARDIANCE · JETSTREAM SC · KONECT RESILIA · Kerendia · LANGSTON · LEQVIO · Levemir · LifeSPARC System · LifeVest · Livalo · METACROSS OTW · MITRACLIP · MITRIS RESILIA Mitral Valve · MULTAQ · NEXLETOL · NORTHERA · ONPATTRO · OPSUMIT · OPTICROSS · OPTIMIZER · OPTIS · OptiCross · Optimizer · OptoWire · Orsiro Mission · Ozempic · PK Papyrus · PRADAXA · PRALUENT · PRALUENT ALIROCUMAB INJECTION · PRAXBIND · Phasix · Photonblade · Pouch · ROTAPRO · RYBELSUS · Renamic Neo · Repatha · Resolute · Rivacor · Rivacor 7 DR-T · Rybelsus · S · SAPIEN 3 Ultra RESILIA · SHOCKWAVE IVL SYSTEM WITH THE SHOCKWAVE C2 CORONARY IVL CATHETER · SPIRIVA RESPIMAT · SYNERGY ABLATION SYSTEM · Selectra · Solia · Sotalol Hydrochloride · TISSEEL · Tryton Side Branch Stent · UPTRAVI · VERQUVO · VIGILANT · VISTA BRITE TIP · VYNDAQEL · Vascepa · Vascular Closure Device · Vascular Lithotripsy · WAINUA · WATCHMAN · WINREVAIR · XARELTO · XIENCE SIERRA · Xience Sierra Coronary Stent · Xience Sierra Coronary Stent System · ZIO Patch · ZIO XT Patch · ZYPITAMAG
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
2,520
County median income
$125,727
Nearest hospital to ZIP centroid (approximate)
KAISER FOUNDATION HOSPITAL - WALNUT CREEK
2.8 mi
2.8 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. Chang is a remote & electrophysiology specialist, with above-average Medicare volume (top 4% in CA), 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. Chang experienced with remote monitoring of implantable heart rhythm device?
Based on Medicare claims data, Dr. Chang performed 1,127 remote monitoring of implantable heart rhythm device 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. Chang receive payments from pharmaceutical companies?
Yes. Dr. Chang received a total of $135,067 from 79 companies across 1,264 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. Chang's costs compare to other internal medicine physicians in Walnut Creek?
Dr. Chang's average Medicare payment per service is $71. 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. Chang) 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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