Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Abhishek Kumar, MD

Individual provider Radiation Oncology Physician · NPI 1043847114

Abhishek Kumar, MD practises Radiation Oncology in Cerritos, California. Qualified in 2020, 6 years ago. Practices with The Oncology Institute Ca, a Professional Corporation, a 114-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in California and North Carolina.

Years since qualifying
6
Licensed in
CA, NC
In the registry since
2020
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

18000 Studebaker Rd Ste 800
Cerritos, CA 90703-2671
Phone: (562) 735-3226
Fax: (833) 438-9659
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 15262 Goldenwest St, Westminster, CA 92683-6169 — (714) 430-3865

Specialties & licences

Radiation Oncology Physician (primary) Taxonomy 2085R0001X · Licence A195171 (CA)
Radiation Oncology Physician Taxonomy 2085R0001X · Licence RTL21-1087 (NC)

Record details

NPI number1043847114
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMarch 26, 2020
Last updated in NPPESJuly 28, 2025
Certification dateJuly 28, 2025

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyRADIATION ONCOLOGY
Medical schoolOTHER
Graduated 2020 (6 years in practice)
Group practice The Oncology Institute Ca, A Professional Corporation — 114 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $18 1 payment · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Colleagues at The Oncology Institute Ca, a Professional Corporation

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 114 clinicians in the practice; 12 are shown here.