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MRS. GERTRUDE AREJA OSTER APRN
NPI 1265611537
Nurse Practitioner in Tucson, AZ

Active since November 02, 2007PECOS EnrolledAccepts Medicare Assignment
4511 N CAMPBELL AVE STE 100, TUCSON, AZ 85718(520) 529-6500(520) 209-7337 Get Directions Write a Review

NPPES record last updated: November 22, 2019. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Mrs. Gertrude Areja Oster Aprn NPPES

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

MRS. GERTRUDE AREJA OSTER APRN (NPI 1265611537) is an individual nurse practitioner in Tucson, Arizona, licensed in Arizona (AP2816) and active in the NPI registry since November 2007. She is enrolled in Medicare PECOS and is a graduate of Other (2005).

NPPES Registry Identity

NPI1265611537
Entity TypeIndividualFemale
Primary Taxonomy363L00000X
Provider Legal NameMRS. GERTRUDE AREJA OSTERCredential: APRN
Location Address4511 N CAMPBELL AVE STE 100Tucson, AZ 85718-6424
Mailing Address3333 E Camelback Rd Ste 180Phoenix, AZ 85018-2396 · (602) 759-6883 · Fax (602) 224-3358
Phone(520) 529-6500
Fax(520) 209-7337
Sole ProprietorNo
Medical School CMSOtherGraduated 2005
Enumeration DateNovember 2, 2007
Last NPPES UpdateNovember 22, 2019
✔ NPI 1265611537 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 AZ · AP2816
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 · FamilyTaxonomy 363LF0000X · License AP2816 (AZ)
4511 N CAMPBELL AVE STE 100, Tucson, AZ 85718
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Other Names 1

Other Name (5)Mrs. Trudy Areja Oster Aprn

Other Identifiers 2

OtherAP2816AZ · State License Fnp
OtherRN140274AZ · State License-rn

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross Blue Shield of Arizona, Imperial Insurance Companies, 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

Mrs. Gertrude Areja Oster Aprn 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 ID446348643
PECOS Enrollment IDI20071126000309
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.

Dialysis services, 2-3 physician visits per month (20 years or older) 90961
Dialysis is a treatment that performs the function of healthy kidneys if they're not working properly. It removes waste and excess fluid from your blood. 2-3 physician visits per month are recommended for monitoring your health and adjusting your treatment as needed. This service is available for those aged 20 years and older.
56 services36 patients
Dialysis services, 4 or more physician visits per month (20 years or older) 90960
Dialysis is a treatment that filters and purifies your blood using a machine. It helps keep your fluids and electrolytes in balance when the kidneys can't do their job. This service includes 4 or more visits per month with a physician to monitor your health and adjust your treatment as needed.
55 services31 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 85718 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
$98.00 typical visit price
range $17.72 – $137.41
Typical copayment $24.50 (range $4.43 – $34.35)
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 2

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

CHARLES BENJAMIN CARTER JR. M.D.
Internal Medicine (Nephrology)
4511 N CAMPBELL AVE STE 100
TUCSON, AZ 85718
Pima County (520) 529-6500
DR. RENEE KISHBAUGH DC
Chiropractor
4511 N CAMPBELL AVE STE 100
TUCSON, AZ 85718
Pima County (520) 247-5549

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 Gertrude Oster's NPI number?

The NPI number for Gertrude Oster is 1265611537. It was assigned to this individual provider in the NPPES registry on November 2, 2007. The provider is also known as Mrs. Trudy Areja Oster Aprn.

Where is Gertrude Oster located?

Gertrude Oster practices at 4511 N Campbell Ave Ste 100, Tucson, AZ 85718. The listed phone number is (520) 529-6500.

What is Gertrude Oster's specialty?

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

Is Gertrude Oster enrolled in Medicare?

Yes. Gertrude Oster 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.

What insurance does Gertrude Oster accept?

Health plans from Blue Cross Blue Shield of Arizona, Imperial Insurance Companies, Inc. and UnitedHealthcare list Gertrude Oster as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Gertrude Oster was last updated on November 22, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.