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OSCAR A DIAZ N.P.
NPI 1043980980
Nurse Practitioner in Mission Hills, CA

Active since September 13, 2021PECOS EnrolledAccepts Medicare Assignment
11133 N SEPULVEDA BLVD, MISSION HILLS, CA 91346(818) 837-5785 Get Directions Write a Review

NPPES record last updated: November 3, 2021. Verified against the NPPES registry weekly; last sync: November 08, 2026.

Record update history: Nov 3, 2021, Sep 13, 2021 (2 updates tracked since 2021).

About Oscar A Diaz N.p. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

OSCAR A DIAZ N.P. (NPI 1043980980) is an individual nurse practitioner in Mission Hills, California, licensed in California (95018402) and active in the NPI registry since September 2021. He is enrolled in Medicare PECOS and is a graduate of Other (2021).

NPPES Registry Identity

NPI1043980980
Entity TypeIndividualMale
Primary Taxonomy363L00000X
Provider Legal NameOSCAR A DIAZCredential: N.P.
Location Address11133 N SEPULVEDA BLVDMission Hills, CA 91346
Mailing AddressPo Box 9602Mission Hills, CA 91346-9602 · (818) 837-5559 · Fax (818) 792-4793
Phone(818) 837-5785
Sole ProprietorYes
Medical School CMSOtherGraduated 2021
Enumeration DateSeptember 13, 2021
Last NPPES UpdateNovember 3, 20212 updates tracked since enumeration
NPPES CertifiedNovember 3, 2021
✔ NPI 1043980980 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyNurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363L00000X
License✔ Licensed in CA · 95018402
Definition
(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision making and direct accountability for clinical judgment across the health care continuum or in a certified specialty. (2) A registered nurse who has completed additional training beyond basic nursing education and who provides primary health care services in accordance with state nurse practice laws or statutes. Tasks performed by nurse practitioners vary with practice requirements mandated by geographic, political, economic, and social factors. Nurse practitioner specialists include, but are not limited to, family nurse practitioners, gerontological nurse practitioners, pediatric nurse practitioners, obstetric-gynecologic nurse practitioners, and school nurse practitioners.
Also ListedNurse Practitioner · Adult HealthTaxonomy 363LA2200X · License 95018402 (CA)
Also ListedNurse Practitioner · GerontologyTaxonomy 363LG0600X · License 95018402 (CA)
11133 N SEPULVEDA BLVD, Mission Hills, CA 91346
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Oscar A Diaz N.p. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID3476951856
PECOS Enrollment IDI20211015001074
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Oscar Diaz reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

El Proyecto Del Barrio, Inc.
2.7 mi
Federally Qualified Health Center (FQHC)
9140 VAN NUYS BLVD STE 207
Panorama City, CA 91402
  • Reassigned Medicare billing, California enrollment
  • 38 clinicians in this Medicare group
NPI 1568871143 (818) 830-7181

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 91346 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$96.36 typical visit price
range $62.96 – $187.60
Typical copayment $24.09 (range $15.74 – $46.90)
Most-billed visit code 99203
Established Patient
$109.96 typical visit price
range $20.84 – $153.61
Typical copayment $27.49 (range $5.21 – $38.40)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Oscar Diaz's NPI number?

The NPI number for Oscar Diaz is 1043980980. It was assigned to this individual provider in the NPPES registry on September 13, 2021.

Where is Oscar Diaz located?

Oscar Diaz practices at 11133 N Sepulveda Blvd, Mission Hills, CA 91346. The listed phone number is (818) 837-5785.

What is Oscar Diaz's specialty?

The primary specialty registered for this NPI is Nurse Practitioner with taxonomy code 363L00000X.

Is Oscar Diaz enrolled in Medicare?

Yes. Oscar Diaz is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organization bills Medicare for Oscar Diaz's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Oscar Diaz reassigns Medicare benefits to El Proyecto Del Barrio, Inc. (Panorama City, CA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Oscar Diaz's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Oscar Diaz was last updated on November 3, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.