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Mrs. Gertrude Areja Oster, APRN

Nurse Practitioner in Tucson, AZ · enumerated 2007 · practices at Akdhc, LLC.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1265611537

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Registry record

Entity type Individual (Type 1)
Name Mrs. Gertrude Areja Oster
Credential APRN
Sex Female
Practice address 4511 N Campbell Ave Ste 100, Tucson, AZ, 85718
Phone (520) 529-6500
Fax (520) 209-7337
Enumeration date Nov 2, 2007
Last updated in NPPES Nov 22, 2019

Taxonomy & licenses

363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License AP2816 (AZ) Secondary
363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License AP2816 (AZ) Primary
APRN · Advanced Practice Registered Nurse: An umbrella credential covering NPs, CRNAs, CNMs, and clinical nurse specialists. About the APRN credential

Other identifiers

Identifier Type State Issuer
AP2816 Other AZ STATE LICENSE FNP
RN140274 Other AZ STATE LICENSE-RN

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

Where does Gertrude Oster practice?
The practice location on file with NPPES is in Tucson, AZ. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Gertrude Oster?
The National Provider Identifier (NPI) for Gertrude Oster is 1265611537, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-11-22.