Robert Yoji Yamane, MD
Internal Medicine Physician · Westlake Village, CA
Robert Yoji Yamane, MD is an internal medicine physician with a practice address in Westlake Village, California, and NPI 1174542898, issued on Jul 19, 2006. Check the license (California G56063, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Robert Yoji Yamane
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- G56063 CA
Self-reported in NPPES; status is on the state search - Practice location
- 141 Triunfo Canyon RD Ste 110, Westlake Village, CA 91361
- Phone
- (805) 371-1393
- Enumerated
- Jul 19, 2006
- Record last updated
- Jan 8, 2025
- Medicare enrollment
- Enrolled (PECOS I20101005000741); accepts Medicare assignment
- Medical or professional school
- University Of California, Geffen School Of Medicine, 1984
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 141 Triunfo Canyon RD Ste 110
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Natalie Abrahamian, M.D.Internal Medicine Physician1356882567
- Christine Dahlin, M.D.Internal Medicine Physician1922293786
- Mark HallRheumatology Physician1891181103
- Leslie JohnsonFamily Medicine Physician1083107197
- Alina Katsman, M.D.Adult Medicine Physician1528351459
- Fang-Yu Liu, MDInfectious Disease Physician1104311216
Verify Robert Yoji Yamane in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G56063Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
47% fewer Medicare Part D claims than the average internal medicine physician in 2024
1,679 Medicare Part D claims for 335 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 17 claims were for opioids.
Most prescribed
- Rosuvastatin Calcium151 claims
- Amlodipine Besylate73 claims
- Atorvastatin Calcium73 claims
- Levothyroxine Sodium72 claims
- Lisinopril55 claims
- Meloxicam50 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.
Bills Medicare through one group practice
- The Regents OF The University OF CaliforniaThousand Oaks, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Robert Yoji Yamane among 17,696 internal medicine physician records in California
Robert Yoji Yamane, MD 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 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1984 · median 2004 among the 11,065 with a school on file
- Record last updated2025 · 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).
14 internal medicine physician records list a practice address in Westlake Village
They are 14 of the 1,397 NPPES records with a practice address in Westlake Village, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Westlake Village → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Mandana Azar, M.D.Thousand Oaks, CA 913611851612402
- William Coburn, M.D.Thousand Oaks, CA 913611144336983
- Christine Dahlin, M.D.Westlake Village, CA 913611922293786
- Anil Daya, M.D.Westlake Village, CA 913611770542722
- Rauz Eshraghi, M.D.Westlake Village, CA 913611619109378
- Zoya Furman, M.D.Thousand Oaks, CA 913611083635205
- Linda Gerrits, MDWestlake Village, CA 913611598875072
- Jigar Ghelani, MDThousand Oaks, CA 913611699823609
Common questions
What is Robert Yoji Yamane, MD's NPI number?
Robert Yoji Yamane, MD's National Provider Identifier (NPI) is 1174542898, issued on Jul 19, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Robert Yoji Yamane, MD located?
The NPPES record lists a practice address at 141 Triunfo Canyon RD Ste 110, Westlake Village, CA, 91361. Phone: (805) 371-1393. Providers update this record themselves, so call before visiting.
How can I verify Robert Yoji Yamane, MD's license?
NPPES lists California license number G56063, 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 Robert Yoji Yamane, MD prescribe under Medicare Part D?
In 2024, Robert Yoji Yamane, MD had 1,679 Medicare Part D claims for 335 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.