NPPES file of Aug 9, 2026

Robert H. Ozaki, D.O.

Sports Medicine (Family Medicine) Physician · Walnut Creek, CA

Robert H. Ozaki, D.O. is a sports medicine (family medicine) physician with a practice address in Walnut Creek, California, and NPI 1851358915, issued on May 1, 2006. Check the license (California 20A8665, 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
1851358915
Name
Robert H. Ozaki
Credential
D.O.
Primary taxonomy
Sports Medicine (Family Medicine) Physician 207QS0010X
License number
20A8665 CA
Self-reported in NPPES; status is on the state search
Practice location
320 Lennon LN, Walnut Creek, CA 94598
Phone
(925) 532-4392
Enumerated
May 1, 2006
Record last updated
Jan 11, 2022
Medicaid ID
274393100 FL
Medicare enrollment
Enrolled (PECOS I20180419001076); accepts Medicare assignment
Medical or professional school
At Still University Of Health Sciences, College Of Osteo Med, Kirksville, 2001
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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8 nearest sports medicine (family medicine) physician records → All 266 in California → Look up another NPI →

Also registered at 320 Lennon LN

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

  1. Joel Acab, MDInternal Medicine Physician1518405661
  2. Vitas Alekna, MDOphthalmology Physician1770661860
  3. Mary Andre, P.T.Physical Therapist1740344779
  4. Lynn Arsenault, MDPediatrics Physician1972681054
  5. Ashley Batchelder, DPTPhysical Therapist1851450936
  6. Cynthia Bellitt, R.N.N.P.Women's Health Nurse Practitioner1851464630

Verify Robert H. Ozaki in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license 20A8665    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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7.6 times the Medicare Part D claims of the average sports medicine (family medicine) physician in 2024

6,535 Medicare Part D claims for 908 beneficiaries, against an average of 855 among the 2,237 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 203 claims were for opioids.

  1. Robert Ozaki6,535
  2. Specialty average855

Most prescribed

  1. Atorvastatin Calcium700 claims
  2. Lisinopril293 claims
  3. Losartan Potassium292 claims
  4. Amlodipine Besylate280 claims
  5. Levothyroxine Sodium188 claims
  6. Atenolol175 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 IncWalnut Creek, CA

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

Robert H. Ozaki among 266 sports medicine (family medicine) physician records in California

Robert H. Ozaki, D.O. 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 2006, is newer than 5% of them.

  • NPI issued2006 · 5% of these records are older, 73% newer
  • In a Medicare fileYes · 84% of these records are
  • In the CMS Doctors and Clinicians fileYes · 71% of these records are
  • Graduated2001 · median 2012 among the 190 with a school on file
  • Record last updated2022 · 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 Walnut Creek → Sports Medicine (Family Medicine) Physician nationwide →

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

  1. Matthew Pecci, M.D.Walnut Creek, CA 945981699749754
  2. Nancy Rolnik, M.D.Walnut Creek, CA 945981710083654
  3. William Ross, MDWalnut Creek, CA 945961548312697
  4. Julia Hohman, M.D.Walnut Creek, CA 945951649327685
  5. Steven Zonner, D.O.Union City, CA 945871578736617
  6. Alan Grusky, MDOakland, CA 946111386394872
  7. Allen Wong, MDOakland, CA 946111508278466
  8. Chi Chien Yau, DOOakland, CA 946111447756317

Common questions

What is Robert H. Ozaki, D.O.'s NPI number?

Robert H. Ozaki, D.O.'s National Provider Identifier (NPI) is 1851358915, issued on May 1, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Robert H. Ozaki, D.O. located?

The NPPES record lists a practice address at 320 Lennon LN, Walnut Creek, CA, 94598. Phone: (925) 532-4392. Providers update this record themselves, so call before visiting.

How can I verify Robert H. Ozaki, D.O.'s license?

NPPES lists California license number 20A8665, 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 H. Ozaki, D.O. prescribe under Medicare Part D?

In 2024, Robert H. Ozaki, D.O. had 6,535 Medicare Part D claims for 908 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.