NPPES file of Aug 9, 2026

Yuka Yamaguchi, M.D.

Urology Physician · Palo Alto, CA

Yuka Yamaguchi, M.D. is a urology physician with a practice address in Palo Alto, California, and NPI 1114192119, issued on Apr 30, 2008. Check the license (California A139890, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1114192119
Name
Yuka Yamaguchi
Credential
M.D.
Primary taxonomy
Urology Physician 208800000X
License number
A139890 CA
Self-reported in NPPES; status is on the state search
Practice location
795 EL Camino Real, Palo Alto, CA 94301
Phone
(650) 853-2988
Enumerated
Apr 30, 2008
Record last updated
Jun 3, 2020 (not updated in 6 years: call before relying on the address or phone)
Medicare enrollment
Enrolled (PECOS I20160224001384); accepts Medicare assignment
Medical or professional school
University Of Michigan Medical School, 2008
Telehealth
Offers telehealth (CMS)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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Also registered at 795 EL Camino Real

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Hamza AbbasiInternal Medicine Physician1821545484
  2. Arman Abdalkhani, MDOtolaryngology Physician1356536130
  3. Sara AbrahamsInternal Medicine Physician1952988354
  4. Nana Efua Adabie, PMHNP-BCPsychiatric/Mental Health Nurse Practitioner1437647732
  5. Amy Adams, M.D.Dermatology Physician1679643928
  6. William Adams, DPMFoot & Ankle Surgery Podiatrist1447487830

Verify Yuka Yamaguchi in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A139890
    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the California license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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15% more Medicare Part D claims than the average urology physician in 2024

1,545 Medicare Part D claims for 401 beneficiaries, against an average of 1,340 among the 10,782 providers of this specialty who prescribed in Part D. 19 claims were for opioids.

  1. Yuka Yamaguchi1,545
  2. Specialty average1,340

Most prescribed

  1. Tamsulosin Hcl381 claims
  2. Finasteride295 claims
  3. Myrbetriq173 claims
  4. Estradiol124 claims
  5. Gemtesa63 claims
  6. Cephalexin62 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

  1. Sutter Bay Medical FoundationSan Mateo, CA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Yuka Yamaguchi among 1,524 urology physician records in California

Yuka Yamaguchi, M.D. is one of 1,524 urology physician records with a practice address in California. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 60% of them.

  • NPI issued2008 · 60% of these records are older, 36% newer
  • In a Medicare fileYes · 82% of these records are
  • In the CMS Doctors and Clinicians fileYes · 69% of these records are
  • Graduated2008 · median 2003 among the 1,049 with a school on file
  • Record last updated2020 · 59% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208800000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Urology Physician providers in California

There are 1,524 urology physician records in California.

The 8 urology physician records with the nearest ZIP codes

  1. James Bassett, M.D.Palo Alto, CA 943011689776403
  2. William Brubaker, MDPalo Alto, CA 943011518387224
  3. Andrew Epstein, MDPalo Alto, CA 943011093817819
  4. Keith Lee, MDPalo Alto, CA 943011114036142
  5. Daniel Yao, M.D.Palo Alto, CA 943011619048972
  6. Thomas Hsu, M.D.Palo Alto, CA 943041851433833
  7. John Lavelle, MB, BCH, FRCSIPalo Alto, CA 943041962405449
  8. Christopher Payne, M.D.Palo Alto, CA 943041649315292

Common questions

What is Yuka Yamaguchi, M.D.'s NPI number?

Yuka Yamaguchi, M.D.'s National Provider Identifier (NPI) is 1114192119, issued on Apr 30, 2008. An NPI identifies a provider in billing; it is not a license.

Where is Yuka Yamaguchi, M.D. located?

The NPPES record lists a practice address at 795 EL Camino Real, Palo Alto, CA, 94301. Phone: (650) 853-2988. Providers update this record themselves, so call before visiting.

How can I verify Yuka Yamaguchi, M.D.'s license?

NPPES lists California license number A139890, 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 Yuka Yamaguchi, M.D. prescribe under Medicare Part D?

In 2024, Yuka Yamaguchi, M.D. had 1,545 Medicare Part D claims for 401 beneficiaries; the average among urology physician prescribers was 1,340. 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.