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EDESSA ORE-GIRON DIAZ FNP
NPI 1427264563
Nurse Practitioner - Family in Oakland, CA

Active since May 15, 2007PECOS Enrolled
3451 E. 12TH STREET, OAKLAND, CA 94601(510) 535-4000(510) 535-4128 Get Directions Write a Review

NPPES record last updated: May 27, 2022. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Edessa Ore-giron Diaz Fnp NPPES

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

EDESSA ORE-GIRON DIAZ FNP (NPI 1427264563) is an individual family provider in Oakland, California, licensed in California (NPF17435) and active in the NPI registry since May 2007. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1427264563
Entity TypeIndividualFemale
Primary Taxonomy363LF0000X
Provider Legal NameEDESSA ORE-GIRON DIAZCredential: FNP
Location Address3451 E. 12TH STREETOakland, CA 94601
Mailing Address1601 Fruitvale AveOakland, CA 94601 · (510) 535-4000 · Fax (510) 535-4128
Phone(510) 535-4000
Fax(510) 535-4128
Sole ProprietorNo
Enumeration DateMay 15, 2007
Last NPPES UpdateMay 27, 2022
NPPES CertifiedMay 27, 2022
✔ NPI 1427264563 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyNurse Practitioner · FamilyPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363LF0000X
License✔ Licensed in CA · NPF17435
Also ListedRegistered NurseTaxonomy 163W00000X · License RN671027 (CA)
Also ListedNurse PractitionerTaxonomy 363L00000X · License NP17435 (CA)
3451 E. 12TH STREET, Oakland, CA 94601
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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 (PECOS)

Edessa Ore-giron Diaz Fnp is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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 Edessa Diaz reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Permanente Medical Group Inc
12 mi
Internal Medicine
2238 GEARY
San Francisco, CA 94116
  • Reassigned Medicare billing, California enrollment
  • 20,078 clinicians in this Medicare group
NPI 1841373800 (415) 833-2200

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 94601 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
$104.51 typical visit price
range $69.00 – $202.35
Typical copayment $26.12 (range $17.25 – $50.58)
Most-billed visit code 99203
Established Patient
$119.48 typical visit price
range $23.44 – $166.46
Typical copayment $29.87 (range $5.86 – $41.61)
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.

Other Providers at the Same Location NPPES 3

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

IAN PATRICK HOFFMAN MD
Family Medicine
3451 E. 12TH STREET
OAKLAND, CA 94601
Alameda County (510) 535-3319
JEANNETTE HILGERT LCSW
Social Worker (Clinical)
3451 E. 12TH STREET
OAKLAND, CA 94601
Alameda County (510) 535-3700
MARIA EUGENIA MASSELLA HERNANDEZ NP
Family Medicine
3451 E. 12TH STREET, FAMILY MEDICINE DEPARTMENT, ADMINISTRATION
OAKLAND, CA 94601
Alameda County (510) 535-3500

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 Edessa Diaz's NPI number?

The NPI number for Edessa Diaz is 1427264563. It was assigned to this individual provider in the NPPES registry on May 15, 2007.

Where is Edessa Diaz located?

Edessa Diaz practices at 3451 E. 12th Street, Oakland, CA 94601. The listed phone number is (510) 535-4000.

What is Edessa Diaz's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.

Is Edessa Diaz enrolled in Medicare?

Yes. Edessa Diaz is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Edessa Diaz's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Edessa Diaz reassigns Medicare benefits to Permanente Medical Group Inc (San Francisco, 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 Edessa 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 Edessa Diaz was last updated on May 27, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.