Isabella Geneva Chen, M.D.
Hematology & Oncology Physician · Ventura, CA
Isabella Geneva Chen, M.D. is a hematology & oncology physician with a practice address in Ventura, California, and NPI 1053621730, issued on Oct 15, 2010. Check the license (California A118096, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Isabella Geneva Chen
- Credential
- M.D.
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- A118096 CA
Self-reported in NPPES; status is on the state search - Practice location
- 300 Hillmont Ave, Ventura, CA 93003
- Phone
- (805) 652-6218
- Enumerated
- Oct 15, 2010
- Record last updated
- Sep 29, 2025
- Fax
- (805) 652-6512
- Medicare enrollment
- Enrolled (PECOS I20161005001991); accepts Medicare assignment
- Medical or professional school
- Jefferson Medical College Of Thomas Jefferson University, 2010
- 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 300 Hillmont Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Thomas Adelman, CRTTCertified Respiratory Therapist1114732666
- Henrique Aihara, TECHElectroneurodiagnostic Specialist/Technologist1861108235
- Anne Akhimien, MDFamily Medicine Physician1205408515
- Trease Allen, PSYCH TECHLicensed Psychiatric Technician1174648620
- Mary Allport, LCSWClinical Social Worker1083739320
- Edgar Alviz, RNPsychiatric/Mental Health Registered Nurse1386763175
Verify Isabella Geneva Chen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A118096Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
5% fewer Medicare Part D claims than the average hematology & oncology physician in 2024
829 Medicare Part D claims for 113 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. 83 claims were for opioids.
Most prescribed
- Anastrozole59 claims
- Ondansetron Hcl35 claims
- Eliquis34 claims
- Ondansetron Odt31 claims
- Hydrocodone-Acetaminophen30 claims
- Xarelto29 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): 87.2 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
- County OF VenturaVentura, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Isabella Geneva Chen among 1,583 hematology & oncology physician records in California
Isabella Geneva Chen, M.D. 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 2010, is newer than 70% of them.
- NPI issued2010 · 70% of these records are older, 28% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated2010 · median 2003 among the 1,124 with a school on file
- Record last updated2025 · 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
- Manasi Ghatge, MDVentura, CA 930031891322459
- Lynn Kong, MDVentura, CA 930031952356933
- Joshua Rosenberg, MDVentura, CA 930031124280896
- 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 Isabella Geneva Chen, M.D.'s NPI number?
Isabella Geneva Chen, M.D.'s National Provider Identifier (NPI) is 1053621730, issued on Oct 15, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Isabella Geneva Chen, M.D. located?
The NPPES record lists a practice address at 300 Hillmont Ave, Ventura, CA, 93003. Phone: (805) 652-6218. Providers update this record themselves, so call before visiting.
How can I verify Isabella Geneva Chen, M.D.'s license?
NPPES lists California license number A118096, 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 Isabella Geneva Chen, M.D. prescribe under Medicare Part D?
In 2024, Isabella Geneva Chen, M.D. had 829 Medicare Part D claims for 113 beneficiaries; the average among hematology & oncology physician prescribers was 877. Part D covers Medicare prescriptions only.
What is Isabella Geneva Chen, M.D.'s MIPS final score?
The 2023 MIPS final score is 87.2 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.