# VanderbiltDDx - Case Simulator

> Medical case simulator for practicing diagnostic skills with realistic patient scenarios. (iPhone/iPad app by Vanderbilt University Medical Center.)

- Source: https://appshunter.io/ios/app/vanderbiltddx-case-simulator/id1484979647 (this page in markdown: same URL + `.md`)
- Developer: [Vanderbilt University Medical Center](https://appshunter.io/developer/1114939673)
- Category: Medical, Education
- Price: Free
- Rating: 5.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 13.5 · 28 MB
- Languages: English
- Released: 2020-10-01
- Data updated: 2026-06-28
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/vanderbiltddx-case-simulator/id1484979647/reviews.md

## What is VanderbiltDDx?

The VanderbiltDDx Case Simulator (“App”) helps users to practice and refine their diagnostic skills. It creates realistic, fun, easy-to-evaluate adult (age 16-75+) patient cases. The intended audience includes medical, nursing, physician assistant, and other health professional students; physicians undergoing residency and fellowship training; nurses in advanced practice training; and practicing health professionals. The App generates cases using a large, evidence-based, literature- derived knowledge base (630+ disorders seen by internists, 4500+ findings). To construct each simulated case, the App randomly selects logically consistent findings based on how often the literature indicates the findings occur in patients with the targeted disorder.
Vanderbilt is distributing the App free-of-charge via its Portal on the App Store for use in clinical education. The App, once installed, is self-contained on users’ iOS devices. It does not transmit any information about the user or use of the App.
Typical App workflow is as follows:
(1) User sets difficulty level/clinical focus; starts random simulated case.
(2) App randomly selects a disorder and displays initial set of findings.
(3) User, via App, elicits additional findings (i.e., works up case).
(4) App shows potential diagnoses matching known case findings.
(5) App indicates how well the known case findings support or refute selected hypotheses. User identifies their three most favored hypotheses.
(6) User rates “strength of evidence” supporting top three hypotheses.
(7) App discloses answer and assesses user’s performance.
(8) User gains knowledge by reviewing disorder-related information.
Users can provide feedback to the development team regarding bugs and suggestions to make the App more useful. Send such comments
to: vanderbiltddx@icloud.com
The App’s primary developer, Randolph A. Miller, MD, is Professor Emeritus of Biomedical Informatics and Medicine at Vanderbilt University School of Medicine. He was the founding Chair of Vanderbilt’s Department of Biomedical Informatics and is a Past President of both the American Medical Informatics Association (AMIA), and the American College of Medical Informatics.

## Key features

- Realistic patient case generation
- Evidence-based knowledge base
- Hypothesis testing and assessment
- Performance evaluation
- Disorder-related information review
- Customizable difficulty levels


## Frequently asked questions about VanderbiltDDx

### What is VanderbiltDDx used for?

VanderbiltDDx is a case simulator designed to help users practice and refine their diagnostic skills by presenting realistic adult patient cases. It aids in identifying potential diagnoses and assessing the evidence supporting them.

### Who is the target audience for VanderbiltDDx?

The app is intended for medical, nursing, and physician assistant students, as well as residents, fellows, and practicing health professionals. It is suitable for users aged 16 and above.

### How does VanderbiltDDx generate patient cases?

Cases are generated using a large, evidence-based knowledge base of over 630 disorders and 4500 findings. The app randomly selects logically consistent findings based on their literature-indicated frequency for a given disorder.

### Is VanderbiltDDx free to use?

Yes, VanderbiltDDx is distributed free-of-charge by Vanderbilt University Medical Center for clinical education purposes. It is available on the App Store.

### Does VanderbiltDDx require an internet connection?

No, once installed on an iOS device, VanderbiltDDx is self-contained and does not transmit any user information or require an internet connection to function.

### How does VanderbiltDDx assess user performance?

After the user identifies their top three hypotheses and rates the strength of evidence, the app discloses the correct answer and assesses the user's performance. Users can then review disorder-related information to gain knowledge.

### What platforms is VanderbiltDDx available on?

VanderbiltDDx is available for iOS devices, including iPhone, iPad, and iPod. It has an age rating of 4+.

### How often is VanderbiltDDx updated?

The app was last updated on October 1, 2020, with version 1.0. Information regarding future update frequency is not provided.

## Version history (last 1 release)

### 1.0 — 2020-10-01

No release notes.

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All apps by Vanderbilt University Medical Center: https://appshunter.io/developer/1114939673

## Related topics

[case medical](https://appshunter.io/ios/topics/case-medical)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-28.*