Joshua Daniel Rosenberg, MD
Hematology & Oncology Physician · Ventura, CA
Joshua Daniel Rosenberg, MD is a hematology & oncology physician with a practice address in Ventura, California, and NPI 1124280896, issued on Jun 25, 2008. Check the license (California A107148, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Joshua Daniel Rosenberg
- Credential
- MD
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- A107148 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3291 Loma Vista RD, Ventura, CA 93003
- Phone
- (805) 652-6218
- Enumerated
- Jun 25, 2008
- Record last updated
- Feb 9, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (805) 652-6512
- Medicare enrollment
- Enrolled (PECOS I20140331002012); accepts Medicare assignment
- Medical or professional school
- University Of California, Irvine, California College Of Medicine, 2007
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 1,583 in California → Look up another NPI →
Also registered at 3291 Loma Vista RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Brad Adler, M.D.Anatomic Pathology Physician1003979618
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- James Appel, MDFamily Medicine Physician1083939706
- David Araujo, M.D.Family Medicine Physician1114955994
- Maria Arizmendi, M.D.Pediatrics Physician1366641961
- Ralph Armstrong, M.D.Psychiatry Physician1518016443
Verify Joshua Daniel Rosenberg in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A107148Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
20% more Medicare Part D claims than the average hematology & oncology physician in 2024
1,054 Medicare Part D claims for 178 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. 29 claims were for opioids.
Most prescribed
- Anastrozole146 claims
- Revlimid51 claims
- Prednisone48 claims
- Ondansetron Hcl44 claims
- Eliquis36 claims
- Xarelto36 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): 86.1 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).
Industry payments in 2024: $525.00
1 payment: consulting fee; the largest payer was AstraZeneca Pharmaceuticals LP. The 8,560 providers of this specialty with any payment received $7,481.41 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 Regents OF The University OF CaliforniaSanta Monica, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Joshua Daniel Rosenberg among 1,583 hematology & oncology physician records in California
Joshua Daniel Rosenberg, MD is one of 1,583 hematology & 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 2008, is newer than 60% of them.
- NPI issued2008 · 60% of these records are older, 34% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated2007 · median 2003 among the 1,124 with a school on file
- Record last updated2015 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0003X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hematology & Oncology Physician providers in California
There are 1,583 hematology & oncology physician records in California.
All 1,583 in California → Every provider in Ventura → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Isabella Chen, M.D.Ventura, CA 930031053621730
- Manasi Ghatge, MDVentura, CA 930031891322459
- Lynn Kong, MDVentura, CA 930031952356933
- Ann SalahuddinVentura, CA 930031053350231
- Cassandra Thomas, M.D.Ventura, CA 930031376787416
- Irena Vidito, D.O.Ventura, CA 930031689735227
- Keith Eilerman, M.D.Camarillo, CA 930101316004559
- Kevin Chang, MDOxnard, CA 930301649219452
Common questions
What is Joshua Daniel Rosenberg, MD's NPI number?
Joshua Daniel Rosenberg, MD's National Provider Identifier (NPI) is 1124280896, issued on Jun 25, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Joshua Daniel Rosenberg, MD located?
The NPPES record lists a practice address at 3291 Loma Vista RD, Ventura, CA, 93003. Phone: (805) 652-6218. Providers update this record themselves, so call before visiting.
How can I verify Joshua Daniel Rosenberg, MD's license?
NPPES lists California license number A107148, 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 Joshua Daniel Rosenberg, MD prescribe under Medicare Part D?
In 2024, Joshua Daniel Rosenberg, MD had 1,054 Medicare Part D claims for 178 beneficiaries; the average among hematology & oncology physician prescribers was 877. Part D covers Medicare prescriptions only.
What is Joshua Daniel Rosenberg, MD's MIPS final score?
The 2023 MIPS final score is 86.1 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.