Boryana Eastman, M.D., PH.D.
Radiation Oncology Physician · Lancaster, CA
Boryana Eastman, M.D., PH.D. is a radiation oncology physician with a practice address in Lancaster, California, and NPI 1316301948, issued on Apr 10, 2016. Check the license (California A173254, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Boryana Eastman
- Credential
- M.D., PH.D.
- Primary taxonomy
- Radiation Oncology Physician 2085R0001X
- License number
- A173254 CA
Self-reported in NPPES; status is on the state search - Practice location
- 44151 15TH St W Ste 101, Lancaster, CA 93534
- Phone
- (661) 902-5600
- Enumerated
- Apr 10, 2016
- Record last updated
- Jul 14, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (661) 951-0686
- Medicare enrollment
- Enrolled (PECOS I20210708002582); accepts Medicare assignment
- Medical or professional school
- University Of California, San Diego School Of Medicine, 2016
- 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 44151 15TH St W Ste 101
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Hannah Asghari, MDHematology & Oncology Physician1891114583
- Fornati Bedell, M.D.Urology Physician1700203346
- Brendan Boland, MDSurgical Oncology Physician1790944783
- Kai Dallas, MDUrogynecology and Reconstructive Pelvic Surgery (Urology) Physician1245674480
- Ji Kim, M.D.Radiation Oncology Physician1558523217
Verify Boryana Eastman in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A173254Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.3 times the Medicare Part D claims of the average radiation oncology physician in 2024
306 Medicare Part D claims for 104 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. 13 claims were for opioids.
Most prescribed
- Tamsulosin Hcl97 claims
- Gabapentin20 claims
- Oxybutynin Chloride Er17 claims
- Mometasone Furoate16 claims
- Lidocaine15 claims
- Lidocaine Hcl Viscous13 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 99.1 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- City OF Hope Medical FoundationSouth Pasadena, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Boryana Eastman among 735 radiation oncology physician records in California
Boryana Eastman, M.D., PH.D. 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 2016, is newer than 84% of them.
- NPI issued2016 · 84% of these records are older, 13% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated2016 · median 2005 among the 545 with a school on file
- Record last updated2021 · 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 Lancaster → Radiation Oncology Physician nationwide →
The 8 radiation oncology physician records with the nearest ZIP codes
- Ji Kim, M.D.Lancaster, CA 935341558523217
- Trevor Lim, M.D.Lancaster, CA 935341669546164
- Yuchi Peng, MDPalmdale, CA 935511023058195
- Artour Torossian, M.D.Palmdale, CA 935511851656953
- James Longo, MDTempleton, CA 934651083606602
- Paul Pagnini, M.D.Templeton, CA 934651225188105
- William Silveira, MDClovis, CA 936111447494398
- Dylan Conroy, MDSanta Maria, CA 934541942761812
Common questions
What is Boryana Eastman, M.D., PH.D.'s NPI number?
Boryana Eastman, M.D., PH.D.'s National Provider Identifier (NPI) is 1316301948, issued on Apr 10, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Boryana Eastman, M.D., PH.D. located?
The NPPES record lists a practice address at 44151 15TH St W Ste 101, Lancaster, CA, 93534. Phone: (661) 902-5600. Providers update this record themselves, so call before visiting.
How can I verify Boryana Eastman, M.D., PH.D.'s license?
NPPES lists California license number A173254, 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 Boryana Eastman, M.D., PH.D. prescribe under Medicare Part D?
In 2024, Boryana Eastman, M.D., PH.D. had 306 Medicare Part D claims for 104 beneficiaries; the average among radiation oncology physician prescribers was 134. Part D covers Medicare prescriptions only.
What is Boryana Eastman, M.D., PH.D.'s MIPS final score?
The 2023 MIPS final score is 99.1 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.