Dr. Chang-Hwa Mary Chen, M.D.
What this data tells you about Dr. Chen
Dr. Chang-Hwa Mary Chen is an anesthesiology specialist in Duarte, CA, with 19 years of NPI registration. Based on federal Medicare data, Dr. Chen performed 230 Medicare services across 228 unique beneficiaries.
Between the years covered by Open Payments, Dr. Chen received a total of $53,266 from 11 pharmaceutical and/or device companies across 58 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in anesthesiology. 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. Chen 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.
Medicare Practice Summary
Medicare Utilization ↗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 |
|---|---|---|---|
| Anesthesia for total knee replacement Administration of anesthesia during a total knee joint replacement procedure. |
47 | $329 | $2,428 |
| Anesthesia for total hip replacement Administration of anesthesia during a total hip replacement surgery. This code covers the anesthetic services provided for the procedure. |
29 | $336 | $2,474 |
| Arterial line insertion A tube is inserted into an artery through the skin to allow for blood sampling or infusion. |
29 | $36 | $373 |
| Femoral nerve injection with anesthetic and/or steroid An injection of an anesthetic agent and/or steroid into the femoral nerve in the thigh. This procedure delivers medication directly to the nerve. |
27 | $52 | $875 |
| Continuous infusion of anesthetic agent and/or steroid into thigh nerve (femoral nerve) through catheter | 26 | $59 | $1,500 |
| Anesthesia for upper abdomen procedure Administration of anesthesia for surgical procedures performed on the upper abdomen. |
24 | $450 | $3,742 |
| 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. |
14 | $12 | $125 |
| Anesthesia for extensive prostate removal Administration of anesthesia during a surgical procedure to remove a significant portion of the prostate gland. |
12 | $472 | $4,042 |
| Anesthesia for other brain procedure Administration of anesthesia for a surgical procedure on the brain that is not otherwise specified. |
11 | $531 | $4,170 |
| Anesthesia for endoscopic procedure on esophagus, stomach, or upper small bowel Administration of anesthesia during an endoscopic procedure involving the esophagus, stomach, or upper small bowel. |
11 | $159 | $1,171 |
Industry Payment Transparency
Open Payments through 2024 ↗Payment profile
Industry payments classified by relationship type. Not all payments are equal — research and consulting reflect different relationships than speaking programs or meals.
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
Payments by company (2024)
All-time payments by company (2018-2024) ›
Associated products mentioned in payments ›
The majority of payments (98%) are consulting fees, which typically reflect recognized clinical expertise sought by manufacturers. Total industry engagement is in the top 1% for anesthesiology in CA.
Geographic Context
3.1 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. Chen is a cardiac surgery specialist, with above-average Medicare volume (top 22% in CA), with consulting-driven industry engagement in the top 1% of CA 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
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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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