Dr. Diane Duyen Nguyen, DO
What this data tells you about Dr. Nguyen
Dr. Diane Duyen Nguyen is a hematology & oncology in McAllen, TX, with 18 years in practice. Based on federal Medicare data, Dr. Nguyen performed 704 Medicare services across 225 unique beneficiaries.
Between the years covered by Open Payments, Dr. Nguyen received a total of $6,781 from 66 pharmaceutical and/or device companies across 278 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in hematology & oncology. 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. Nguyen is Very High — reflecting how much public federal data is available about this provider. This is not a quality rating. 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 |
|---|---|---|---|
| Flow cytometry, additional marker | 276 | $18 | $62 |
| Office visit, established patient (30-39 min) | 108 | $93 | $345 |
| Office visit, established patient, complex (40-54 min) | 88 | $129 | $482 |
| Hospital follow-up visit, high complexity | 54 | $96 | $319 |
| Infusion into a vein for therapy, prevention, or diagnosis, additional sequential infusion, 1 hour or less | 51 | $22 | $82 |
| Drug injection, under skin or into muscle | 35 | $11 | $38 |
| Infusion into a vein for therapy, prevention, or diagnosis, 1 hour or less | 27 | $42 | $178 |
| Initial hospital admission, high complexity | 21 | $140 | $502 |
| New patient office visit, complex (60-74 min) | 18 | $174 | $590 |
| Prolonged office or other outpatient evaluation and management service(s) beyond the maximum required time of the primary procedure which has been selected using total time on the date of the primary service; each additional 15 minutes by the physician or | 14 | $26 | $86 |
| Flow cytometry technique for dna or cell analysis, first marker | 12 | $50 | $189 |
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)
Associated products mentioned in payments ›
Most payments (91%) are for meals and travel — low-value interactions that are common across virtually all practicing physicians.
Geographic Context
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 measures how much public data is available about a provider — not how good they are. How we calculate this →
Summary
Dr. Nguyen is a clinical cardiology specialist, with moderate Medicare volume, and low-engagement industry engagement, with 18 years of practice experience.
This summary is auto-generated from federal data. It describes data availability and patterns — not clinical quality. Read our methodology →
Frequently Asked Questions
Is Dr. Nguyen experienced with flow cytometry, additional marker?
Does Dr. Nguyen receive payments from pharmaceutical companies?
How do Dr. Nguyen's costs compare to other hematology & oncologys in McAllen?
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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. The Transparency Score measures 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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