Charles Nguyen, M.D.
Medical Oncology Physician · Irvine, CA
Charles Nguyen, M.D. is a medical oncology physician with a practice address in Irvine, California, and NPI 1902303431, issued on Apr 11, 2018. Check the license (California A195487, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Charles Nguyen
- Credential
- M.D.
- Primary taxonomy
- Medical Oncology Physician 207RX0202X
- License number
- A195487 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1000 Fivepoint, Irvine, CA 92618
- Phone
- (949) 671-4673
- Enumerated
- Apr 11, 2018
- Entity
- Type 1 · individual
Also registered at 1000 Fivepoint
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Mary Alessi, PA-CPhysician Assistant1962711838
- Tara Anderson, PA-CPhysician Assistant1770058349
- Aubree Ashdown, PA-CPhysician Assistant1679244503
- Ghazal Bahri, M.D.Hospitalist Physician1770013146
- Meg Camille Baldonado, FNP-CFamily Nurse Practitioner1346602604
- Joseph Barrera, FNPFamily Nurse Practitioner1306289491
Verify Charles Nguyen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A195487Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
82% fewer Medicare Part D claims than the average medical oncology physician in 2024
129 Medicare Part D claims for 36 beneficiaries, against an average of 703 among the 4,230 providers of this specialty who prescribed in Part D. Brand-name drugs were 32% of claims. 13 claims were for opioids.
Most prescribed
- Prednisone27 claims
- Nubeqa20 claims
- Orgovyx16 claims
- Abiraterone Acetate12 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: $409.27
11 payments, mostly food and beverage; the largest payer was Aveo Pharmaceuticals, Inc. 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
- City OF Hope Medical FoundationIrvine, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Medical Oncology Physician providers in California
There are 447 medical oncology physician records in California.
Other medical oncology physician records in California
- Donald Abrams, MDSan Francisco, CA1679530018
- Ranjana Advani, MDStanford, CA1639225121
- Kambiz Afrasiabi, M.D.Anaheim, CA1578572368
- Mark Agulnik, MDLos Angeles, CA1164448734
- David Agus, M.D.Los Angeles, CA1356328249
- Weiyun Ai, MDSan Francisco, CA1649346842
- Shafqat Akhtar, MDRed Bluff, CA1700960788
- Luai Al Rabadi, M.D.San Francisco, CA1659637452
- Michael Alexander, MDSanta Cruz, CA1053321760
- Sandra AlgazeLos Angeles, CA1861886707
Common questions
What is Charles Nguyen, M.D.'s NPI number?
Charles Nguyen, M.D.'s National Provider Identifier (NPI) is 1902303431, issued on Apr 11, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Charles Nguyen, M.D. located?
The NPPES record lists a practice address at 1000 Fivepoint, Irvine, CA, 92618. Phone: (949) 671-4673. Providers update this record themselves, so call before visiting.
How can I verify Charles Nguyen, M.D.'s license?
NPPES lists California license number A195487, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Charles Nguyen, M.D. prescribe under Medicare Part D?
In 2024, Charles Nguyen, M.D. had 129 Medicare Part D claims for 36 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), loaded Aug 27, 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) 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 27, 2026.