Gertrude Areja Oster, APRN
- Medicare patients, 2024
- 67
- Part D claims, 2024
- 202
- Affiliated sites
- 2
- Medical groups
- 2
- State license
- 1
- Practice address
- 2802 South 6th Avenue, Tucson, AZ 85713
- Practice phone
- Call (520) 792-2999
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Fresenius Kidney Care South Tucson
Dialysis Center - Independent · Tucson, Arizona
Find Gertrude Oster's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Gertrude Areja Oster is a nurse practitioner in Tucson, Arizona
Gertrude Oster practices at Fresenius Kidney Care South Tucson in Tucson, Arizona.
Gertrude Oster's NPI, 1265611537, was assigned on November 2, 2007. Gertrude Oster holds Arizona license AP2816.
- NPI
- 1265611537NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0446348643
- NPI enumeration date
- November 2, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (520) 792-2999
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 47
- Medical school graduation
- 2005
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Gertrude Areja Oster practices at Fresenius Kidney Care South Tucson in Tucson, Arizona
Gertrude Oster's primary practice is Fresenius Kidney Care South Tucson, at 2802 South 6th Avenue, Tucson, AZ 85713 in Pima County. The practice phone is (520) 792-2999.
- Fresenius Kidney Care South Tucson2802 South 6th Avenue, Tucson, AZ 85713 · Pima CountyPhone(520) 792-2999
Source: Dmand AI Affiliation Data
Gertrude Areja Oster is affiliated with 2 sites of care and 2 medical groups
Gertrude Oster's primary practice is Fresenius Kidney Care South Tucson in Tucson, Arizona. The medical group on file is Arizona Kidney Disease & Hypertension Centers (AKDHC). Dmand AI also links Gertrude Oster to 1 more group practice or clinic and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Gertrude Areja Oster's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Gertrude Oster practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Fresenius Kidney Care South Tucson | Available with a free account |
| +1 more site and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Gertrude Areja Oster is one of 1,439 nurse practitioners in Arizona
Nurse practitioner is Gertrude Oster's primary specialty in the NPI Registry, under taxonomy code 363L00000X. Gertrude Oster is licensed in Arizona.
Specialties and state licenses
- Nurse practitioner, ArizonaPrimary
Nurse practitioners near Gertrude Oster
Counts of nurse practitioners with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Gertrude Areja Oster treated 67 Medicare patients in 2024, average age 66
CMS counts 67 Medicare patients who saw Gertrude Oster in 2024. The largest group is under 65, with 28 patients. 75% of them have chronic kidney disease, and 75% have diabetes. 52% are also on Medicaid. Their average risk score is 9.10, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Gertrude Oster's median patient age at 69, with 43% women.
Gertrude Oster's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Gertrude Oster's Medicare patients by sex, 2024
- Women3248%
- Men3552%
Chronic conditions among Gertrude Oster's Medicare patients, 2024
- Chronic kidney disease75%
- Diabetes75%
- High blood pressure75%
- High cholesterol75%
- Heart failure63%
- Ischemic heart disease46%
- Mood disorders33%
- Anxiety28%
Share of Medicare patients with each condition. A patient can have several.
Gertrude Oster's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 69
Patient panel by sex, all payers
- Women43%
- Men50%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Gertrude Areja Oster wrote 202 Medicare Part D claims in 2024
In 2024, Gertrude Oster wrote 202 Medicare Part D claims for 60 patients. 83% of them were for generic drugs.
Gertrude Oster's Part D claims by kind of drug, 2024
- Generic168 claims83%
- Brand-name34 claims17%
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Gertrude Areja Oster takes part in Medicare
Gertrude Oster accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Sources for Gertrude Areja Oster's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Gertrude Areja Oster
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What is Gertrude Areja Oster's NPI number?
Gertrude Areja Oster's NPI number is 1265611537. It was assigned on November 2, 2007, and it is active in the NPI Registry.
What does Gertrude Areja Oster specialize in?
Gertrude Areja Oster is a nurse practitioner in Tucson, Arizona. The primary specialty in the NPI Registry is Nurse Practitioner (taxonomy code 363L00000X).
Where does Gertrude Areja Oster practice?
Gertrude Oster practices at 2802 South 6th Avenue, Tucson, AZ 85713. Gertrude Oster's primary practice is Fresenius Kidney Care South Tucson in Tucson, Arizona. Dmand AI also links Gertrude Oster to 1 group practice or clinic and 1 medical group.
What is Gertrude Areja Oster's office phone number?
The practice phone on file for Gertrude Oster is (520) 792-2999.
What is Gertrude Areja Oster's medical license number?
Gertrude Oster holds Arizona license AP2816.
What medical group is Gertrude Areja Oster part of?
Gertrude Oster is linked to Arizona Kidney Disease & Hypertension Centers (AKDHC). Dmand AI links Gertrude Oster to 1 more medical group.
Does Gertrude Areja Oster accept Medicare?
Yes. CMS lists Gertrude Oster as accepting Medicare assignment.
How many Medicare patients does Gertrude Areja Oster see?
CMS counts 67 Medicare patients who saw Gertrude Oster in 2024, with an average age of 66.
How long has Gertrude Areja Oster been practicing?
Gertrude Oster graduated from medical school in 2005, 21 years ago.
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