Michael John Maranzano, M.D.
Hematology & Oncology Physician · Los Angeles, CA
Michael John Maranzano, M.D. is a hematology & oncology physician with a practice address in Los Angeles, California, and NPI 1114453016, issued on May 11, 2017. Check the license (California 170563, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Michael John Maranzano
- Credential
- M.D.
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- 170563 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2051 Marengo St, Los Angeles, CA 90033
- Phone
- (323) 409-7804
- Enumerated
- May 11, 2017
- Record last updated
- Mar 7, 2025
- Fax
- (323) 441-4328
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 1,583 in California → Look up another NPI →
Also registered at 2051 Marengo St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Adolfo AguilarCritical Care Registered Respiratory Therapist1053836999
- Ashley Allen, MDEmergency Medicine Physician1053751875
Verify Michael John Maranzano in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 170563Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
94% fewer Medicare Part D claims than the average hematology & oncology physician in 2024
52 Medicare Part D claims for 20 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 23% of 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: $255.38
5 payments; by number, the most common kind was food and beverage; the largest payer was Genzyme 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.
Michael John Maranzano among 1,583 hematology & oncology physician records in California
Michael John Maranzano, 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 2017, is newer than 89% of them.
- NPI issued2017 · 89% of these records are older, 8% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileNo · 71% of these records are
- 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 Los Angeles → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Warren Banta, MDLos Angeles, CA 900331861695678
- 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
- David Masiello, M.D.Los Angeles, CA 900331427277573
Common questions
What is Michael John Maranzano, M.D.'s NPI number?
Michael John Maranzano, M.D.'s National Provider Identifier (NPI) is 1114453016, issued on May 11, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Michael John Maranzano, M.D. located?
The NPPES record lists a practice address at 2051 Marengo St, Los Angeles, CA, 90033. Phone: (323) 409-7804. Providers update this record themselves, so call before visiting.
How can I verify Michael John Maranzano, M.D.'s license?
NPPES lists California license number 170563, 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 Michael John Maranzano, M.D. prescribe under Medicare Part D?
In 2024, Michael John Maranzano, M.D. had 52 Medicare Part D claims for 20 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.