Oscar A. Diaz, N.P.
Nurse Practitioner · Mission Hills, CA
Oscar A. Diaz, N.P. is a nurse practitioner with a practice address in Mission Hills, California, and NPI 1043980980, issued on Sep 13, 2021. Check the license (California 95018402, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Oscar A. Diaz
- Credential
- N.P.
- Primary taxonomy
- Nurse Practitioner 363L00000X
- License number
- 95018402 CA
Self-reported in NPPES; status is on the state search - Practice location
- 11133 N Sepulveda Blvd, Mission Hills, CA 91346
- Phone
- (818) 837-5785
- Enumerated
- Sep 13, 2021
- Record last updated
- Nov 3, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20211015001074); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest nurse practitioner records → All 8,223 in California → Look up another NPI →
Verify Oscar A. 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 95018402Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
72% fewer Medicare Part D claims than the average nurse practitioner in 2024
312 Medicare Part D claims for 73 beneficiaries, against an average of 1,109 among the 54,319 providers of this specialty who prescribed in Part D. Brand-name drugs were 16% of claims.
Most prescribed
- Metformin Hcl37 claims
- Atorvastatin Calcium32 claims
- Amlodipine Besylate24 claims
- Losartan Potassium23 claims
- Omeprazole19 claims
- Lisinopril15 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: $852.81
65 payments; by number, the most common kind was food and beverage; the largest payer was Amgen Inc. The 38,884 providers of this specialty with any payment received $791.64 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.
Bills Medicare through one group practice
- EL Proyecto Del Barrio IncCanoga Park, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Oscar A. Diaz among 8,223 nurse practitioner records in California
Oscar A. Diaz, N.P. is one of 8,223 nurse practitioner records with a practice address in California. 65% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2021, is newer than 71% of them.
- NPI issued2021 · 71% of these records are older, 23% newer
- In a Medicare fileYes · 65% of these records are
- In the CMS Doctors and Clinicians fileYes · 42% of these records are
- Graduated2021 · median 2017 among the 3,425 with a school on file
- Record last updated2021 · 45% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363L00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
13 nurse practitioner records list a practice address in Mission Hills
They are 13 of the 731 NPPES records with a practice address in Mission Hills, and 8,223 nurse practitioner records in California.
All 8,223 in California → Every provider in Mission Hills → Nurse Practitioner nationwide →
The 8 nurse practitioner records with the nearest ZIP codes
- Harry Avellona, NURSE PRACTITIONERMission Hills, CA 913451861992141
- Maria Behrooj, N.P.Mission Hills, CA 913451043735939
- Carla Calderon, N.P.Mission Hills, CA 913451588917256
- Elizabeth Cattell, R.N., ACNP-CMission Hills, CA 913451023144920
- Kristian Caesar Fernandez, NPMission Hills, CA 913451972315588
- Harpinder KaurMission Hills, CA 913451780459131
- Mary Klumph, N.P.Mission Hills, CA 913451124020243
- Garen Mirzayan, N.P.Mission Hills, CA 913451134656952
Common questions
What is Oscar A. Diaz, N.P.'s NPI number?
Oscar A. Diaz, N.P.'s National Provider Identifier (NPI) is 1043980980, issued on Sep 13, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Oscar A. Diaz, N.P. located?
The NPPES record lists a practice address at 11133 N Sepulveda Blvd, Mission Hills, CA, 91346. Phone: (818) 837-5785. Providers update this record themselves, so call before visiting.
How can I verify Oscar A. Diaz, N.P.'s license?
NPPES lists California license number 95018402, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Oscar A. Diaz, N.P. prescribe under Medicare Part D?
In 2024, Oscar A. Diaz, N.P. had 312 Medicare Part D claims for 73 beneficiaries; the average among nurse practitioner prescribers was 1,109. 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.