Ruth Teruyo Yamada, PA-C
Physician Assistant · Los Angeles, CA
Ruth Teruyo Yamada, PA-C is a physician assistant with a practice address in Los Angeles, California, and NPI 1801078498, issued on Dec 5, 2007. Check the license (California PA19479, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Ruth Teruyo Yamada
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- PA19479 CA
Self-reported in NPPES; status is on the state search - Practice location
- 311 Winston St, Los Angeles, CA 90013
- Phone
- (213) 893-1960
- Enumerated
- Dec 5, 2007
- Record last updated
- Dec 6, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (213) 229-9061
- Medicare enrollment
- Enrolled (PECOS I20120326000279); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 14,451 in California → Look up another NPI →
Also registered at 311 Winston St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Ruth Teruyo Yamada in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license PA19479Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
71% fewer Medicare Part D claims than the average physician assistant in 2024
239 Medicare Part D claims for 104 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. Brand-name drugs were 5% of claims. 85 claims were for opioids.
Most prescribed
- Hydrocodone-Acetaminophen43 claims
- Levetiracetam32 claims
- Methocarbamol31 claims
- Oxycodone Hcl30 claims
- Gabapentin13 claims
- Clopidogrel12 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
- Southern California Permanente Medical GroupAnaheim, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ruth Teruyo Yamada among 14,451 physician assistant records in California
Ruth Teruyo Yamada, PA-C is one of 14,451 physician assistant records with a practice address in California. 75% 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 13% of them.
- NPI issued2007 · 13% of these records are older, 78% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated2007 · median 2018 among the 7,214 with a school on file
- Record last updated2021 · 40% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
935 physician assistant records list a practice address in Los Angeles
They are 935 of the 69,537 NPPES records with a practice address in Los Angeles, and 14,451 physician assistant records in California.
All 14,451 in California → Every provider in Los Angeles → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
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- Cullen GrayLos Angeles, CA 900131487369799
- Pierre Houbein, PA-CLos Angeles, CA 900131417298753
- Lauren Anne Layson, PA-CLos Angeles, CA 900131487047940
- Rebekah NguyenLos Angeles, CA 900131093188765
- Briana Paxton, PA-CLos Angeles, CA 900131275076606
- Katherine Phan Yee, P.A.Los Angeles, CA 900131982970786
Common questions
What is Ruth Teruyo Yamada, PA-C's NPI number?
Ruth Teruyo Yamada, PA-C's National Provider Identifier (NPI) is 1801078498, issued on Dec 5, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Ruth Teruyo Yamada, PA-C located?
The NPPES record lists a practice address at 311 Winston St, Los Angeles, CA, 90013. Phone: (213) 893-1960. Providers update this record themselves, so call before visiting.
How can I verify Ruth Teruyo Yamada, PA-C's license?
NPPES lists California license number PA19479, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Ruth Teruyo Yamada, PA-C prescribe under Medicare Part D?
In 2024, Ruth Teruyo Yamada, PA-C had 239 Medicare Part D claims for 104 beneficiaries; the average among physician assistant prescribers was 830. 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.