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ALEJANDRA DIAZ
NPI 1922578657
Physician Assistant in Modesto, CA

Active since November 26, 2018PECOS EnrolledAccepts Medicare Assignment
4601 DALE RD, MODESTO, CA 95356(209) 735-0000 Get Directions Write a Review

NPPES record last updated: May 12, 2025. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: May 12, 2025, Apr 10, 2025, Nov 26, 2018 (3 updates tracked since 2018).

About Alejandra Diaz NPPES

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

ALEJANDRA DIAZ (NPI 1922578657) is an individual physician assistant in Modesto, California and active in the NPI registry since November 2018. She is enrolled in Medicare PECOS and is a graduate of Other (2025).

NPPES Registry Identity

NPI1922578657
Entity TypeIndividualFemale
Primary Taxonomy363A00000X
Provider Legal NameALEJANDRA DIAZ
Location Address4601 DALE RDModesto, CA 95356-9718
Mailing Address1751 Bayberry LnTracy, CA 95376-5263 · (209) 914-3710
Phone(209) 735-0000
Sole ProprietorNo
Medical School CMSOtherGraduated 2025
Enumeration DateNovember 26, 2018
Last NPPES UpdateMay 12, 20253 updates tracked since enumeration
NPPES CertifiedMay 12, 2025
✔ NPI 1922578657 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPhysician AssistantPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363A00000X
Definition
A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the scope of that license. Physician assistants are formally trained to perform many of the routine, time-consuming tasks a physician can do. In some states, they may prescribe medications. They take medical histories, perform physical exams, order lab tests and x-rays, and give inoculations. Most states require that they work under the supervision of a physician.
Also ListedRespiratory Therapist, RegisteredTaxonomy 227900000X · License 35585 (CA)
4601 DALE RD, Modesto, CA 95356
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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Alejandra Diaz 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 ID4284123340
PECOS Enrollment IDI20251029001721
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 95356 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
$90.32 typical visit price
range $58.87 – $176.60
Typical copayment $22.58 (range $14.71 – $44.15)
Most-billed visit code 99203
Established Patient
$73.16 typical visit price
range $19.28 – $144.60
Typical copayment $18.29 (range $4.82 – $36.15)
Most-billed visit code 99213
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.

NATHAN STUEMPFIG D.O.
Emergency Medicine
4601 DALE RD
MODESTO, CA 95356
Stanislaus County (209) 715-1780
RAYVEN ZHANG
Student in an Organized Health Care Education/Training Program
4601 DALE RD
MODESTO, CA 95356
Stanislaus County (916) 856-2837
JAY PATEL
Student in an Organized Health Care Education/Training Program
4601 DALE RD
MODESTO, CA 95356
Stanislaus County (209) 735-5000
BRIAN E. DOLNICK DO
Internal Medicine
4601 DALE RD
MODESTO, CA 95356
Stanislaus County (209) 557-1000
WEI LOONG GLENN KOH MD
Surgery
4601 DALE RD, SUITE 4A5
MODESTO, CA 95356
Stanislaus County (925) 200-1811
DR. JOSHUA MCKEE ANDERSON M.D.
Internal Medicine (Gastroenterology)
4601 DALE RD
MODESTO, CA 95356
Stanislaus County (209) 735-7200
JOSHUA MICHAEL
Respiratory Therapist, Registered
4601 DALE RD
MODESTO, CA 95356
Stanislaus County (209) 735-7590
YUECHIAO LIANG PHARM.D.
Pharmacist
4601 DALE RD
MODESTO, CA 95356
Stanislaus County (209) 735-6950

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 Alejandra Diaz's NPI number?

The NPI number for Alejandra Diaz is 1922578657. It was assigned to this individual provider in the NPPES registry on November 26, 2018.

Where is Alejandra Diaz located?

Alejandra Diaz practices at 4601 Dale Rd, Modesto, CA 95356. The listed phone number is (209) 735-0000.

What is Alejandra Diaz's specialty?

The primary specialty registered for this NPI is Physician Assistant with taxonomy code 363A00000X.

Is Alejandra Diaz enrolled in Medicare?

Yes. Alejandra 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.

When was this NPI record last updated?

The NPPES record for Alejandra Diaz was last updated on May 12, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.