NPPES file of Aug 9, 2026

Chi Chien Catherine Yau, DO

Sports Medicine (Family Medicine) Physician · Oakland, CA

Chi Chien Catherine Yau, DO is a sports medicine (family medicine) physician with a practice address in Oakland, California, and NPI 1447756317, issued on Apr 1, 2018. Check the license (California 20A18922, 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
1447756317
Name
Chi Chien Catherine Yau
Credential
DO
Primary taxonomy
Sports Medicine (Family Medicine) Physician 207QS0010X
License number
20A18922 CA
Self-reported in NPPES; status is on the state search
Practice location
3600 Broadway, Oakland, CA 94611
Phone
(510) 362-4243
Enumerated
Apr 1, 2018
Record last updated
Feb 27, 2023
Medicare enrollment
Enrolled (PECOS I20210811002425); accepts Medicare assignment
Medical or professional school
Arizona College Of Osteopathic Medicine Mid Western University, 2021
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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8 nearest sports medicine (family medicine) physician records → All 266 in California → Look up another NPI →

Also registered at 3600 Broadway

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

  1. Dann August AbenojarCritical Care Registered Respiratory Therapist1316411242
  2. Jacob AbjelinaStudent in an Organized Health Care Education/Training Program1184474850
  3. Basma Al Bast, MDCardiovascular Disease Physician1184145682
  4. Danielle AllenSpeech-Language Pathologist1154838118
  5. Kritika Amanjee, MD, MBAStudent in an Organized Health Care Education/Training Program1962192666
  6. Eduardo AmarCertified Respiratory Therapist1811460546

Verify Chi Chien Catherine Yau in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license 20A18922    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

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90% fewer Medicare Part D claims than the average sports medicine (family medicine) physician in 2024

85 Medicare Part D claims for 47 beneficiaries, against an average of 855 among the 2,237 providers of this specialty who prescribed in Part D.

  1. Chi Chien Yau85
  2. Specialty average855

Most prescribed

  1. Meloxicam53 claims
  2. Ibuprofen11 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. Permanente Medical Group IncOakland, CA

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

Chi Chien Catherine Yau among 266 sports medicine (family medicine) physician records in California

Chi Chien Catherine Yau, DO is one of 266 sports medicine (family medicine) physician records with a practice address in California. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2018, is newer than 76% of them.

  • NPI issued2018 · 76% of these records are older, 18% newer
  • In a Medicare fileYes · 84% of these records are
  • In the CMS Doctors and Clinicians fileYes · 71% of these records are
  • Graduated2021 · median 2012 among the 190 with a school on file
  • Record last updated2023 · 43% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207QS0010X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Sports Medicine (Family Medicine) Physician providers in California

There are 266 sports medicine (family medicine) physician records in California.

All 266 in California → Every provider in Oakland → Sports Medicine (Family Medicine) Physician nationwide →

The 8 sports medicine (family medicine) physician records with the nearest ZIP codes

  1. Alan Grusky, MDOakland, CA 946111386394872
  2. Allen Wong, MDOakland, CA 946111508278466
  3. Robert Ozaki, D.O.Walnut Creek, CA 945981851358915
  4. Matthew Pecci, M.D.Walnut Creek, CA 945981699749754
  5. Nancy Rolnik, M.D.Walnut Creek, CA 945981710083654
  6. William Ross, MDWalnut Creek, CA 945961548312697
  7. Julia Hohman, M.D.Walnut Creek, CA 945951649327685
  8. Steven Zonner, D.O.Union City, CA 945871578736617

Common questions

What is Chi Chien Catherine Yau, DO's NPI number?

Chi Chien Catherine Yau, DO's National Provider Identifier (NPI) is 1447756317, issued on Apr 1, 2018. An NPI identifies a provider in billing; it is not a license.

Where is Chi Chien Catherine Yau, DO located?

The NPPES record lists a practice address at 3600 Broadway, Oakland, CA, 94611. Phone: (510) 362-4243. Providers update this record themselves, so call before visiting.

How can I verify Chi Chien Catherine Yau, DO's license?

NPPES lists California license number 20A18922, 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 Chi Chien Catherine Yau, DO prescribe under Medicare Part D?

In 2024, Chi Chien Catherine Yau, DO had 85 Medicare Part D claims for 47 beneficiaries; the average among sports medicine (family medicine) physician prescribers was 855. 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.