David James Koster, M.D.
Hematology & Oncology Physician · Fresno, CA
David James Koster, M.D. is a hematology & oncology physician with a practice address in Fresno, California, and NPI 1063406163, issued on Sep 2, 2005. Check the license (California G64875, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- David James Koster
- Credential
- M.D.
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- G64875 CA
Self-reported in NPPES; status is on the state search - Practice location
- 7130 N Millbrook Ave, Fresno, CA 93720
- Phone
- (559) 326-1238
- Enumerated
- Sep 2, 2005
- Record last updated
- Nov 5, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (559) 326-1230
- Medicaid ID
- ZZZ75882Z CA
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 1,583 in California → Look up another NPI →
Also registered at 7130 N Millbrook Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Amardeep Aulakh, D.O.Internal Medicine Physician1700047180
- Andrea Avila, L.C.S.W.Clinical Social Worker1083824429
- Sukhjeet Batth, M.D.Radiation Oncology Physician1821320011
- Jennifer Beltran, FNPNurse Practitioner1306415542
Verify David James Koster in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G64875Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
32% fewer Medicare Part D claims than the average hematology & oncology physician in 2024
595 Medicare Part D claims for 170 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 22% of claims. 27 claims were for opioids.
Most prescribed
- Anastrozole51 claims
- Prochlorperazine Maleate43 claims
- Imbruvica36 claims
- Ondansetron Hcl28 claims
- Abiraterone Acetate27 claims
- Prednisone27 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.
David James Koster among 1,583 hematology & oncology physician records in California
David James Koster, 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 92% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileNo · 71% of these records are
- Record last updated2021 · 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 Fresno → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- V. Reddy Avula, MDFresno, CA 937201740209295
- Marshall Flam, M.D.Fresno, CA 937201891789004
- Leonard Hackett, M.D.Fresno, CA 937201669466868
- Steven Hager, D.O.Fresno, CA 937201326087917
- Abdul Haseeb, M.D.Fresno, CA 937201407897093
- Grace Inouye, MDFresno, CA 937201487728085
- William Jawien, MDFresno, CA 937201417904020
- Suresh Joishy, MDFresno, CA 937201164500070
Common questions
What is David James Koster, M.D.'s NPI number?
David James Koster, M.D.'s National Provider Identifier (NPI) is 1063406163, issued on Sep 2, 2005. An NPI identifies a provider in billing; it is not a license.
Where is David James Koster, M.D. located?
The NPPES record lists a practice address at 7130 N Millbrook Ave, Fresno, CA, 93720. Phone: (559) 326-1238. Providers update this record themselves, so call before visiting.
How can I verify David James Koster, M.D.'s license?
NPPES lists California license number G64875, 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 David James Koster, M.D. prescribe under Medicare Part D?
In 2024, David James Koster, M.D. had 595 Medicare Part D claims for 170 beneficiaries; the average among hematology & oncology physician prescribers was 877. 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.