Gary Toshiyuki Tanouye, M.D.
Internal Medicine Physician · Tarzana, CA
Gary Toshiyuki Tanouye, M.D. is an internal medicine physician with a practice address in Tarzana, California, and NPI 1326043738, issued on Jun 14, 2005. Check the license (California G50249, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Gary Toshiyuki Tanouye
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- G50249 CA
Self-reported in NPPES; status is on the state search - Practice location
- 18370 Burbank Blvd, Tarzana, CA 91356
- Phone
- (818) 996-5700
- Enumerated
- Jun 14, 2005
- Record last updated
- Nov 17, 2009 (not updated in 17 years: call before relying on the address or phone)
- Fax
- (818) 996-1649
- Medicaid ID
- YYY40048Y CA
- Medicare enrollment
- Enrolled (PECOS I20100111000423); accepts Medicare assignment
- Medical or professional school
- University Of Southern California Keck School Of Medicine, 1982
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 18370 Burbank Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- David Abrams, M.D.Internal Medicine Physician1881690865
- Daryl Alexander, MDSpecialist1629143185
- Peter Brian Andersson, MDNeurology Physician1326063843
- Raymond Bailey, MDInternal Medicine Physician1346347408
- Robert Barnhard, M.D.Pediatrics Physician1215962899
- Snunit Ben - Ozer, MDReproductive Endocrinology Physician1437286952
Verify Gary Toshiyuki Tanouye in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G50249Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
64% more Medicare Part D claims than the average internal medicine physician in 2024
5,204 Medicare Part D claims for 559 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims. 86 claims were for opioids.
Most prescribed
- Atorvastatin Calcium435 claims
- Amlodipine Besylate311 claims
- Levothyroxine Sodium289 claims
- Rosuvastatin Calcium211 claims
- Losartan Potassium159 claims
- Metoprolol Succinate152 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): 85.7 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
- Cedars-Sinai Medical Care FoundationTarzana, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gary Toshiyuki Tanouye among 17,696 internal medicine physician records in California
Gary Toshiyuki Tanouye, M.D. is one of 17,696 internal medicine physician records with a practice address in California. 79% 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, 95% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1982 · median 2004 among the 11,065 with a school on file
- Record last updated2009 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
41 internal medicine physician records list a practice address in Tarzana
They are 41 of the 2,122 NPPES records with a practice address in Tarzana, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Tarzana → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- David Abrams, M.D.Tarzana, CA 913561881690865
- Kevin Berger, M.D.Tarzana, CA 913561972522704
- Samuel Elias, M.D.Tarzana, CA 913561982684023
- Azita Fakheri, MDTarzana, CA 913561669410270
- Jeffrey Galpin, M.D.Tarzana, CA 913561386679561
- David Grossman, M.D.Tarzana, CA 913561700843117
- Robert Kayland, M.D.Tarzana, CA 913561871558031
- Gerald Kovar, M.D.Tarzana, CA 913561306883699
Common questions
What is Gary Toshiyuki Tanouye, M.D.'s NPI number?
Gary Toshiyuki Tanouye, M.D.'s National Provider Identifier (NPI) is 1326043738, issued on Jun 14, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Gary Toshiyuki Tanouye, M.D. located?
The NPPES record lists a practice address at 18370 Burbank Blvd, Tarzana, CA, 91356. Phone: (818) 996-5700. Providers update this record themselves, so call before visiting.
How can I verify Gary Toshiyuki Tanouye, M.D.'s license?
NPPES lists California license number G50249, 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 Gary Toshiyuki Tanouye, M.D. prescribe under Medicare Part D?
In 2024, Gary Toshiyuki Tanouye, M.D. had 5,204 Medicare Part D claims for 559 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Gary Toshiyuki Tanouye, M.D.'s MIPS final score?
The 2023 MIPS final score is 85.7 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.