Kevin Diao, MD
Radiation Oncology Physician · Whittier, CA
Kevin Diao, MD is a radiation oncology physician with a practice address in Whittier, California, and NPI 1578067260, issued on Mar 19, 2018. Check the license on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Kevin Diao
- Credential
- MD
- Primary taxonomy
- Radiation Oncology Physician 2085R0001X
- License number
- BP10066528 TX
Self-reported in NPPES; status is on the state search - Practice location
- 12393 Washington Blvd, Whittier, CA 90606
- Phone
- (562) 696-5964
- Enumerated
- Mar 19, 2018
- Record last updated
- Jul 16, 2024
- Medicare enrollment
- Enrolled (PECOS I20230724002245); accepts Medicare assignment
- Medical or professional school
- Harvard Medical School, 2018
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest radiation oncology physician records → All 735 in California → Look up another NPI →
Also registered at 12393 Washington Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- William Kurohara, M.D.Radiation Oncology Physician1073665618
- Jeffrey Yuen, M.D.Radiation Oncology Physician1831241751
Verify Kevin Diao in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of CaliforniaCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
49% more Medicare Part D claims than the average radiation oncology physician in 2024
200 Medicare Part D claims for 90 beneficiaries, against an average of 134 among the 4,851 providers of this specialty who prescribed in Part D. Brand-name drugs were 7% of claims. 19 claims were for opioids.
Most prescribed
- Mometasone Furoate49 claims
- Tamsulosin Hcl44 claims
- Lidocaine Hcl Viscous15 claims
- Hydrocodone-Acetaminophen12 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.
Bills Medicare through one group practice
- Whittier Oncology Medical Clinic IncWhittier, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Kevin Diao among 735 radiation oncology physician records in California
Kevin Diao, MD is one of 735 radiation oncology physician records with a practice address in California. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2018, is newer than 89% of them.
- NPI issued2018 · 89% of these records are older, 8% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated2018 · median 2005 among the 545 with a school on file
- Record last updated2024 · 55% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0001X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Radiation Oncology Physician providers in California
There are 735 radiation oncology physician records in California.
All 735 in California → Every provider in Whittier → Radiation Oncology Physician nationwide →
The 8 radiation oncology physician records with the nearest ZIP codes
- William Kurohara, M.D.Whittier, CA 906061073665618
- Jeffrey Yuen, M.D.Whittier, CA 906061831241751
- Richard Li, MDWhittier, CA 906021174973739
- John Thropay, M.D.Montebello, CA 906401427128073
- Abhishek Kumar, MDCerritos, CA 907031043847114
- Rebecca Philipson, M.D.Torrance, CA 905051184079766
- Andrew Schumacher, M.D.Torrance, CA 905051023457173
- Thomas Simko, MDTorrance, CA 905051558382465
Common questions
What is Kevin Diao, MD's NPI number?
Kevin Diao, MD's National Provider Identifier (NPI) is 1578067260, issued on Mar 19, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Kevin Diao, MD located?
The NPPES record lists a practice address at 12393 Washington Blvd, Whittier, CA, 90606. Phone: (562) 696-5964. Providers update this record themselves, so call before visiting.
How can I verify Kevin Diao, MD's license?
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 Kevin Diao, MD prescribe under Medicare Part D?
In 2024, Kevin Diao, MD had 200 Medicare Part D claims for 90 beneficiaries; the average among radiation oncology physician prescribers was 134. 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.