Yutaka Niihara, M.D.
Hematology & Oncology Physician · Torrance, CA
Yutaka Niihara, M.D. is a hematology & oncology physician with a practice address in Torrance, California, and NPI 1467480459, issued on Jun 29, 2006. Check the license (California G64227, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Yutaka Niihara
- Credential
- M.D.
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- G64227 CA
Self-reported in NPPES; status is on the state search - Practice location
- 21840 Normandie Ave, Torrance, CA 90502
- Phone
- (310) 222-5101
- Enumerated
- Jun 29, 2006
- Record last updated
- Jul 9, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (310) 320-5463
- Medicaid ID
- 00G642270 CA
- Medicare enrollment
- Enrolled (PECOS I20050730000162); accepts Medicare assignment
- Medical or professional school
- Loma Linda University School Of Medicine, 1986
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 1,583 in California → Look up another NPI →
Also registered at 21840 Normandie Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Yutaka Niihara in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G64227Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
91% fewer Medicare Part D claims than the average hematology & oncology physician in 2024
81 Medicare Part D claims for 25 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D.
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.
Bills Medicare through one group practice
- Osato Medical Clinic IncTorrance, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Yutaka Niihara among 1,583 hematology & oncology physician records in California
Yutaka Niihara, 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 2006, is newer than 8% of them.
- NPI issued2006 · 8% of these records are older, 54% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated1986 · median 2003 among the 1,124 with a school on file
- Record last updated2007 · 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 Torrance → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Bryan Chan, MD, MPHTorrance, CA 905021518699982
- Rowan Chlebowski, M.D., PHDTorrance, CA 905021902876386
- Marcin Dragan, M.D.Torrance, CA 905021508354358
- Charity Huang, MDTorrance, CA 905021891157657
- Andrew Hwang, MDTorrance, CA 905021154858694
- Jennifer Lee, M.D.Torrance, CA 905021164798062
- Yenmay LouTorrance, CA 905021679766042
- Kouichi Tanaka, M.D.Torrance, CA 905021174677637
Common questions
What is Yutaka Niihara, M.D.'s NPI number?
Yutaka Niihara, M.D.'s National Provider Identifier (NPI) is 1467480459, issued on Jun 29, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Yutaka Niihara, M.D. located?
The NPPES record lists a practice address at 21840 Normandie Ave, Torrance, CA, 90502. Phone: (310) 222-5101. Providers update this record themselves, so call before visiting.
How can I verify Yutaka Niihara, M.D.'s license?
NPPES lists California license number G64227, 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 Yutaka Niihara, M.D. prescribe under Medicare Part D?
In 2024, Yutaka Niihara, M.D. had 81 Medicare Part D claims for 25 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.