Joseph Michael Diaz, PA-C
Physician Assistant · Ventura, CA
Joseph Michael Diaz, PA-C is a physician assistant with a practice address in Ventura, California, and NPI 1023114709, issued on Sep 16, 2006. Check the license (California PA11970, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Joseph Michael Diaz
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- PA11970 CA
Self-reported in NPPES; status is on the state search - Practice location
- 10885 Telegraph RD, Ventura, CA 93004
- Phone
- (805) 647-7704
- Enumerated
- Sep 16, 2006
- Record last updated
- Sep 22, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (833) 916-2148
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 14,451 in California → Look up another NPI →
Also registered at 10885 Telegraph RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Susan Renteria, N.P.Nurse Practitioner1881631786
- Patricia Wade, FNPFamily Nurse Practitioner1497850150
- Sherilyn Wheaton, M.D.Family Medicine Physician1205861234
Verify Joseph Michael Diaz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license PA11970Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
8% more Medicare Part D claims than the average physician assistant in 2024
895 Medicare Part D claims for 249 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium61 claims
- Amlodipine Besylate47 claims
- Levothyroxine Sodium45 claims
- Gabapentin39 claims
- Metformin Hcl37 claims
- Losartan Potassium36 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.
Industry payments in 2024: $88.74
1 payment: food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 64,719 providers of this specialty with any payment received $841.65 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Joseph Michael Diaz among 14,451 physician assistant records in California
Joseph Michael Diaz, 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 2006, is newer than 1% of them.
- NPI issued2006 · 1% of these records are older, 87% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileNo · 50% of these records are
- 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).
61 physician assistant records list a practice address in Ventura
They are 61 of the 4,435 NPPES records with a practice address in Ventura, and 14,451 physician assistant records in California.
All 14,451 in California → Every provider in Ventura → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Lanette Hatch, MSPACVentura, CA 930041134132897
- Cindy Hernandez, P.A.-CVentura, CA 930041588974497
- Shams HoodaVentura, CA 930041275547549
- Jill Ireland, PA CVentura, CA 930041598783086
- Sam Key, PA-CVentura, CA 930041588395214
- Philip McKay, PA-CVentura, CA 930041437485281
- Rene Rangel, P.A.-CVentura, CA 930041821300500
- Corine Riedell, PA-CVentura, CA 930041871870626
Common questions
What is Joseph Michael Diaz, PA-C's NPI number?
Joseph Michael Diaz, PA-C's National Provider Identifier (NPI) is 1023114709, issued on Sep 16, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Joseph Michael Diaz, PA-C located?
The NPPES record lists a practice address at 10885 Telegraph RD, Ventura, CA, 93004. Phone: (805) 647-7704. Providers update this record themselves, so call before visiting.
How can I verify Joseph Michael Diaz, PA-C's license?
NPPES lists California license number PA11970, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Joseph Michael Diaz, PA-C prescribe under Medicare Part D?
In 2024, Joseph Michael Diaz, PA-C had 895 Medicare Part D claims for 249 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.