Diane Duyen T. Nguyen, DO
Medical Oncology Physician · McAllen, TX
Diane Duyen T. Nguyen, DO is a medical oncology physician with a practice address in McAllen, Texas, and NPI 1023233756, issued on Apr 16, 2007. Check the license (Texas M3045, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Diane Duyen T. Nguyen
- Credential
- DO
- Primary taxonomy
- Medical Oncology Physician 207RX0202X
- License numbers
- M3045 TX
DO1698 TN
Self-reported in NPPES; status is on the state search - Practice location
- 205 E Toronto Ave, McAllen, TX 78503
- Phone
- (956) 296-3990
- Enumerated
- Apr 16, 2007
- Record last updated
- Oct 3, 2024
- Fax
- (956) 665-6837
- Medicare enrollment
- Enrolled (PECOS I20120117000649); accepts Medicare assignment
- Medical or professional school
- West Virginia School Of Osteopathic Medicine, 2001
- Entity
- Type 1 · individual
8 nearest medical oncology physician records → All 547 in Texas → Look up another NPI →
Also registered at 205 E Toronto Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jorge Aboytes Trevino, M.D.Student in an Organized Health Care Education/Training Program1831939644
- Leslie Allison, LMFTAMarriage & Family Therapist1558794917
- Mohammad Aqeel, MDStudent in an Organized Health Care Education/Training Program1558164590
- Armando Arguelles, M.D.Family Medicine Physician1518499797
- Charles Austin, MDFamily Medicine Physician1205879590
- Rafael Badillo DavilaStudent in an Organized Health Care Education/Training Program1053259127
Verify Diane Duyen T. Nguyen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license M3045Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
58% fewer Medicare Part D claims than the average medical oncology physician in 2024
293 Medicare Part D claims for 93 beneficiaries, against an average of 703 among the 4,230 providers of this specialty who prescribed in Part D. Brand-name drugs were 19% of claims. 15 claims were for opioids.
Most prescribed
- Anastrozole44 claims
- Levothyroxine Sodium25 claims
- Tamoxifen Citrate14 claims
- Letrozole12 claims
- Prednisone12 claims
- Xtandi11 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $268.76
8 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 3,343 providers of this specialty with any payment received $11,773.47 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- University OF Texas Rio Grande ValleyHarlingen, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Diane Duyen T. Nguyen among 547 medical oncology physician records in Texas
Diane Duyen T. Nguyen, DO is one of 547 medical oncology physician records with a practice address in Texas. 85% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 55% of them.
- NPI issued2007 · 55% of these records are older, 34% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileYes · 76% of these records are
- Graduated2001 · median 2000 among the 414 with a school on file
- Record last updated2024 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RX0202X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Medical Oncology Physician providers in Texas
There are 547 medical oncology physician records in Texas.
All 547 in Texas → Every provider in McAllen → Medical Oncology Physician nationwide →
The 8 medical oncology physician records with the nearest ZIP codes
- Guillermo Lazo-Diaz, MDMcAllen, TX 785031760421101
- Joseph Litam, MDMcAllen, TX 785031528067469
- Billie Marek, MDMcAllen, TX 785031346282209
- Suresh Ratnam, MDMcAllen, TX 785031649217639
- Alvaro Restrepo, MDMcAllen, TX 785031992748586
- Nirupama Shekar, M.D.McAllen, TX 785031689624405
- Balesh Sharma, MDBrownsville, TX 785211578505483
- Terence Herman, MDHarlingen, TX 785501124097498
Common questions
What is Diane Duyen T. Nguyen, DO's NPI number?
Diane Duyen T. Nguyen, DO's National Provider Identifier (NPI) is 1023233756, issued on Apr 16, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Diane Duyen T. Nguyen, DO located?
The NPPES record lists a practice address at 205 E Toronto Ave, McAllen, TX, 78503. Phone: (956) 296-3990. Providers update this record themselves, so call before visiting.
How can I verify Diane Duyen T. Nguyen, DO's license?
NPPES lists Texas license number M3045, as entered by the provider. Search the Texas Medical Board at https://profile.tmb.state.tx.us/Search.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Diane Duyen T. Nguyen, DO prescribe under Medicare Part D?
In 2024, Diane Duyen T. Nguyen, DO had 293 Medicare Part D claims for 93 beneficiaries; the average among medical oncology physician prescribers was 703. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.