William Matthias Cusick, D.O.
Family Medicine Physician · Oxnard, CA
William Matthias Cusick, D.O. is a family medicine physician with a practice address in Oxnard, California, and NPI 1992754113, issued on May 6, 2006. Check the license (California 20A7059, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- William Matthias Cusick
- Credential
- D.O.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 20A7059 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1690 Universe Cir, Oxnard, CA 93033
- Phone
- (805) 204-9135
- Enumerated
- May 6, 2006
- Record last updated
- Jul 11, 2023
- Fax
- (805) 204-5286
- Medicaid ID
- 00AX70590 CA
- Medicare enrollment
- Enrolled (PECOS I20131204002288); accepts Medicare assignment
- Medical or professional school
- College Of Osteo Med Of The Pacific At Pomona, 1996
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 1690 Universe Cir
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify William Matthias Cusick in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A7059Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
69% more Medicare Part D claims than the average family medicine physician in 2024
5,988 Medicare Part D claims for 343 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 262 claims were for opioids.
Most prescribed
- Atorvastatin Calcium353 claims
- Omeprazole234 claims
- Metformin Hcl225 claims
- Lisinopril217 claims
- Amlodipine Besylate184 claims
- Gabapentin182 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 87.2 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- County OF VenturaVentura, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William Matthias Cusick among 17,133 family medicine physician records in California
William Matthias Cusick, D.O. is one of 17,133 family medicine physician records with a practice address in California. 81% 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 6% of them.
- NPI issued2006 · 6% of these records are older, 59% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated1996 · median 2005 among the 10,652 with a school on file
- Record last updated2023 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
74 family medicine physician records list a practice address in Oxnard
They are 74 of the 3,211 NPPES records with a practice address in Oxnard, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Oxnard → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Erin Bergeron, M.D.Oxnard, CA 930331144274531
- Uldine Castel, M.D.Oxnard, CA 930331568544187
- Darin Chambers, M.D.Oxnard, CA 930331316108053
- Emily Hurst, MDOxnard, CA 930331477249944
- Susan Johnson, M.D.Oxnard, CA 930331942364427
- Steve Jones, MDOxnard, CA 930331407847734
- Shang Liao, M.D.Oxnard, CA 930331538187810
- Henry LiaoOxnard, CA 930331144484247
Common questions
What is William Matthias Cusick, D.O.'s NPI number?
William Matthias Cusick, D.O.'s National Provider Identifier (NPI) is 1992754113, issued on May 6, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William Matthias Cusick, D.O. located?
The NPPES record lists a practice address at 1690 Universe Cir, Oxnard, CA, 93033. Phone: (805) 204-9135. Providers update this record themselves, so call before visiting.
How can I verify William Matthias Cusick, D.O.'s license?
NPPES lists California license number 20A7059, 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 William Matthias Cusick, D.O. prescribe under Medicare Part D?
In 2024, William Matthias Cusick, D.O. had 5,988 Medicare Part D claims for 343 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
What is William Matthias Cusick, D.O.'s MIPS final score?
The 2023 MIPS final score is 87.2 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.