SIENNA CONTRERAS PA-C
NPI 1720749377
Physician Assistant in Gilbert, AZ

Q: What is Sienna Contreras's NPI number?

The NPI number for Sienna Contreras is 1720749377. It was assigned to this individual provider in the NPPES registry on January 5, 2022. The provider is also known as Sienna Anderson.

Q: What is Sienna Contreras's specialty?

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

Q: When was this NPI record last updated?

The NPPES record for Sienna Contreras was last updated on March 28, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 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 January 05, 2022PECOS EnrolledAccepts Medicare Assignment

1675 E MELROSE ST STE 101-103, GILBERT, AZ 85297(602) 648-5444(602) 772-3801 Get Directions Write a Review

NPPES record last updated: March 28, 2025. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Mar 28, 2025, Jul 12, 2024, Jul 3, 2024 and 1 more (4 updates tracked since 2022).

On this page

About Sienna Contreras Pa-c NPPES

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

SIENNA CONTRERAS PA-C (NPI 1720749377) is an individual physician assistant in Gilbert, Arizona, licensed in Arizona (10012) and active in the NPI registry since January 2022. She is enrolled in Medicare PECOS and is a graduate of Other (2023).

NPPES Registry Identity

NPI1720749377

Entity TypeIndividualFemale

Primary Taxonomy363A00000X

Provider Legal NameSIENNA CONTRERASCredential: PA-C

Location Address1675 E MELROSE ST STE 101-103Gilbert, AZ 85297-1001

Mailing AddressPo Box 80217Phoenix, AZ 85060-0217 · (602) 385-2115 · Fax (480) 418-3323

Phone(602) 648-5444

Fax(602) 772-3801

Sole ProprietorNo

Medical School CMSOtherGraduated 2023

Enumeration DateJanuary 5, 2022

Last NPPES UpdateMarch 28, 20254 updates tracked since enumeration

NPPES CertifiedMarch 28, 2025

✔ NPI 1720749377 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPhysician AssistantPhysician Assistants & Advanced Practice Nursing Providers

Taxonomy Code363A00000X

License✔ Licensed in AZ · 10012

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.

1675 E MELROSE ST STE 101-103, Gilbert, AZ 85297

Open in Google Maps ↗

Other Names 1

Former Name (1)Sienna Anderson

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross Blue Shield of Arizona, Oscar Health Plan, Inc., UnitedHealthcare.Insurance ›

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

Sienna Contreras Pa-c 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 ID9436508744

PECOS Enrollment IDI20231212003341

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.

Areas of Expertise CMS Part B claims 2

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

15 services15 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

15 services15 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 85297 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

$85.89 typical visit price

range $55.44 – $168.60

Typical copayment $21.47 (range $13.86 – $42.15)

Most-billed visit code 99203

Established Patient

$69.24 typical visit price

range $17.72 – $137.41

Typical copayment $17.31 (range $4.43 – $34.35)

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.

JAMIE JOSEPH POZNIAK PA-C

Physician Assistant