Abhishek Kumar, MD
Radiation Oncology Physician · Cerritos, CA
Abhishek Kumar, MD is a radiation oncology physician with a practice address in Cerritos, California, and NPI 1043847114, issued on Mar 26, 2020. Check the license (California A195171, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Abhishek Kumar
- Credential
- MD
- Primary taxonomy
- Radiation Oncology Physician 2085R0001X
- License numbers
- A195171 CA
RTL21-1087 NC
Self-reported in NPPES; status is on the state search - Practice location
- 18000 Studebaker RD Ste 800, Cerritos, CA 90703
- Phone
- (562) 735-3226
- Enumerated
- Mar 26, 2020
- Record last updated
- Jul 28, 2025
- Fax
- (833) 438-9659
- Medicare enrollment
- Enrolled (PECOS I20250714001813); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest radiation oncology physician records → All 735 in California → Look up another NPI →
Also registered at 18000 Studebaker RD Ste 800
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Alicia Alexander, MS,PA-CPhysician Assistant1437402989
- Adamma Amadi, FNPPrimary Care Nurse Practitioner1487030656
- Josephine Assini-StruckAcute Care Nurse Practitioner1194290411
- Babak Baseri, M.D.Hematology & Oncology Physician1659716959
- Alex Ehsan, M.D,Medical Oncology Physician1982883948
- Nawazish Khan, MDMedical Oncology Physician1477753903
Verify Abhishek Kumar in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A195171Check 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 radiation oncology physician in 2024
24 Medicare Part D claims for 19 beneficiaries, against an average of 134 among the 4,851 providers of this specialty who prescribed in Part D.
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: $203.33
2 payments; by number, the most common kind was food and beverage; the largest payer was Teleflex LLC. The 3,275 providers of this specialty with any payment received $1,897.85 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
- The Oncology Institute CA, A Professional CorporationLong Beach, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Abhishek Kumar among 735 radiation oncology physician records in California
Abhishek Kumar, 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 2020, is newer than 95% of them.
- NPI issued2020 · 95% of these records are older, 2% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated2020 · median 2005 among the 545 with a school on file
- Record last updated2025 · 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 Cerritos → Radiation Oncology Physician nationwide →
The 8 radiation oncology physician records with the nearest ZIP codes
- Liam Ghiam, MD, MSLos Alamitos, CA 907201689123879
- John Thropay, M.D.Montebello, CA 906401427128073
- Kevin Diao, MDWhittier, CA 906061578067260
- William Kurohara, M.D.Whittier, CA 906061073665618
- Jeffrey Yuen, M.D.Whittier, CA 906061831241751
- Alam Syed, M.D.Long Beach, CA 908011316956279
- Richard Li, MDWhittier, CA 906021174973739
- Sulabha Dave, MDLong Beach, CA 908051821191446
Common questions
What is Abhishek Kumar, MD's NPI number?
Abhishek Kumar, MD's National Provider Identifier (NPI) is 1043847114, issued on Mar 26, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Abhishek Kumar, MD located?
The NPPES record lists a practice address at 18000 Studebaker RD Ste 800, Cerritos, CA, 90703. Phone: (562) 735-3226. Providers update this record themselves, so call before visiting.
How can I verify Abhishek Kumar, MD's license?
NPPES lists California license number A195171, 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 Abhishek Kumar, MD prescribe under Medicare Part D?
In 2024, Abhishek Kumar, MD had 24 Medicare Part D claims for 19 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.