Warren Banta, MD
Hematology & Oncology Physician · Los Angeles, CA
Warren Banta, MD is a hematology & oncology physician with a practice address in Los Angeles, California, and NPI 1861695678, issued on Jun 8, 2007. Check the license (California A88514, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Warren Banta
- Credential
- MD
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- A88514 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1700 E Cesar E Chavez Ave, Los Angeles, CA 90033
- Phone
- (323) 264-0430
- Enumerated
- Jun 8, 2007
- Record last updated
- Jan 6, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (323) 264-2354
- Medicare enrollment
- Enrolled (PECOS I20090309000570); accepts Medicare assignment
- 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 1700 E Cesar E Chavez Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Ethelred Carter, M.D.Gastroenterology Physician1336247964
- Sybil Cross, NP-CAdult Health Nurse Practitioner1982823407
Verify Warren Banta in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A88514Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.3 times the Medicare Part D claims of the average hematology & oncology physician in 2024
2,921 Medicare Part D claims for 507 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 39% of claims. 53 claims were for opioids.
Most prescribed
- Anastrozole451 claims
- Ondansetron Hcl186 claims
- Procrit158 claims
- Hydroxyurea128 claims
- Prochlorperazine Maleate110 claims
- Prednisone99 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.
Industry payments in 2024: $6,350.68
246 payments; by number, the most common kind was food and beverage; the largest payer was Novartis Pharmaceuticals Corporation. 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
- Austin J MA MD A Professional CorporationRancho Cucamonga, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Warren Banta among 1,583 hematology & oncology physician records in California
Warren Banta, 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 2007, is newer than 46% of them.
- NPI issued2007 · 46% of these records are older, 40% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated2002 · median 2003 among the 1,124 with a school on file
- Record last updated2010 · 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 Los Angeles → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Arati Chand, M.D.Los Angeles, CA 900331942434212
- Rahel Demisse, M.D.Los Angeles, CA 900331124462486
- John Hu, M.D.Los Angeles, CA 900331649698127
- Byung Lee, D.OLos Angeles, CA 900331780975136
- Yi-Tsung Lu, M.D.Los Angeles, CA 900331649685504
- Austin Ma, MDLos Angeles, CA 900331598700627
- Michael Maranzano, M.D.Los Angeles, CA 900331114453016
- David Masiello, M.D.Los Angeles, CA 900331427277573
Common questions
What is Warren Banta, MD's NPI number?
Warren Banta, MD's National Provider Identifier (NPI) is 1861695678, issued on Jun 8, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Warren Banta, MD located?
The NPPES record lists a practice address at 1700 E Cesar E Chavez Ave, Los Angeles, CA, 90033. Phone: (323) 264-0430. Providers update this record themselves, so call before visiting.
How can I verify Warren Banta, MD's license?
NPPES lists California license number A88514, 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 Warren Banta, MD prescribe under Medicare Part D?
In 2024, Warren Banta, MD had 2,921 Medicare Part D claims for 507 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.