VALERIA ELENA DIAZ NP
NPI 1194404467
Nurse Practitioner in Palo Alto, CA

Q: What is Valeria Diaz's NPI number?

The NPI number for Valeria Diaz is 1194404467. It was assigned to this individual provider in the NPPES registry on July 14, 2023.

Q: What is Valeria Diaz's specialty?

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

Q: When was this NPI record last updated?

The NPPES record for Valeria Diaz was last updated on February 25, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 months 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.

Active since July 14, 2023PECOS Enrolled

725 WELCH RD, PALO ALTO, CA 94304(650) 497-8000 Get Directions Write a Review

NPPES record last updated: February 25, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Jun 23, 2025, Jul 14, 2023 (2 updates tracked since 2023).

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About Valeria Elena Diaz Np NPPES

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

VALERIA ELENA DIAZ NP (NPI 1194404467) is an individual nurse practitioner in Palo Alto, California, licensed in California (95034376) and active in the NPI registry since July 2023. She is enrolled in Medicare PECOS and maintains a secondary practice location in South San Francisco.

NPPES Registry Identity

NPI1194404467

Entity TypeIndividualFemale

Primary Taxonomy363L00000X

Provider Legal NameVALERIA ELENA DIAZCredential: NP

Location Address725 WELCH RDPalo Alto, CA 94304-1601

Mailing Address725 Welch RdPalo Alto, CA 94304-1601 · (650) 497-8000

Phone(650) 497-8000

Sole ProprietorNo

Enumeration DateJuly 14, 2023

Last NPPES UpdateFebruary 25, 20262 updates tracked since enumeration

NPPES CertifiedFebruary 25, 2026

✔ NPI 1194404467 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyNurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers

Taxonomy Code363L00000X

License✔ Licensed in CA · 95034376

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 ListedRegistered Nurse · PediatricsTaxonomy 163WP0200X · License 95045009 (CA)

725 WELCH RD, Palo Alto, CA 94304

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Secondary Practice Location 1

Location 1111 Pecks LnSouth San Francisco, CA 94080-1744 · Phone (508) 858-1248

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Valeria Elena Diaz Np 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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94304 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

$106.47 typical visit price

range $70.37 – $206.04

Typical copayment $26.61 (range $17.59 – $51.51)

Most-billed visit code 99203

Established Patient

$121.77 typical visit price

range $23.96 – $169.60

Typical copayment $30.44 (range $5.99 – $42.40)

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.

Other Providers at the Same Location NPPES 20

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

EIRI INENAGA MS, OTR/L

Occupational Therapist (Pediatrics)