The #1 Choice for USMLE®
Step 2 CK & Shelf Exam Preparation

  • 4,250+ Step 2 and shelf exam questions
  • Based on real-life clinical scenarios
  • Paired with in-depth, visual answer explanations
  • Tested in an exam-like software interface
  • Organized to track your performance by subject and system
NEW! Introducing ReadyDecks
Study smarter and save time with our readymade flashcard decks, carefully curated to help you excel in clinical rotations, your shelf exams, and Step 2 CK.
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Proven Step 2 Prep with Adaptable Shelf Exam Coverage

The UWorld Step 2 CK question bank is a comprehensive Step 2 and shelf exam resource built with the flexibility to assist students during rotations. As practicing doctors ourselves, we understand how useful an adaptable study aid can be during this stage of medical school. Join the over 90% of students who save time, excel on their exams, and prepare for residency with UWorld.

With Step 1 now a pass/fail exam, residencies are placing greater emphasis on students’ Step 2 CK exam results. As medical schools adjust to this change, it’s more important than ever for students to supplement their Step 2 prep with dedicated materials to improve their score.

Optimize Your Time with Our Step 2 Question Bank

Due to rotations, shelf exams, and other obligations, your Step 2 preparation will be more challenging to balance than Step 1.

To help, we organized our Step 2 QBank into “Shelf Review” and “Step 2 CK Review.”

Study for Your Shelf Exams

Use “Shelf Review” as you begin each rotation to practice questions and review explanations that are directly related to your shelf subject. Because the content tested on your shelf exams is largely applicable to Step 2 CK, preparing in this order will keep you focused on your rotation while giving you a head start on Step 2.

The UWorld Shelf Review feature toggle option in the Step 2 QBank
Prepare for Step 2 CK

Once you’ve completed your rotations and passed your shelf exams, you can turn your focus more exclusively to Step 2. Switch to “Step 2 Review” to practice with questions that reflect the latest USMLE Step 2 content outline. Please note that Step 2 questions answered in Shelf Review will already be marked as complete.

Benefit from Detailed Rationales & Active Learning

During both your shelf exam and Step 2 prep, read through our detailed explanations. Our experienced content authors walk through problem scenarios and outline why answer options are right or wrong. You can then transfer this high-yield content into custom flashcards with spaced-repetition technology and a personalized digital notebook for greater retention.

Improve Your Performance with Targeted Analytics

As you answer practice questions, you’ll be able to view personalized performance analytics to efficiently remediate weaknesses. Reports can be viewed for your entire Step 2 QBank, as well as by subject, system, and topic. You’ll also get access to peer performance data that will help you determine your exam readiness.

UWorld Step 2 CK Success Stories

Uworld still stands as the best resource out there for the USMLE® exams and when properly utilized as a learning tool, is undefeated.”

Stephen D.
UWorld questions leave nothing unexplained. The questions are fantastic and the explanations are always spot on."

Callie H.
Awesome clinical scenarios in questions. It helped me to find gaps in my existing knowledge.”

Arpankumar S.

Beyond Our Step 2 CK QBank

To fill in knowledge gaps and help you navigate this highly demanding period of medical school, we offer dedicated resources both within our Step 2 QBank and sold separately.

Step 2 Practice Exams

UWorld Step 2 self-assessments are modeled after the real exam to boost your confidence and prepare you for test day. They consist of four 60-minute blocks containing 40 unique multiple-choice questions each. Once completed, you can review:

  • Thorough answer explanations with vivid illustrations and charts
  • An analysis of your strengths and weaknesses, as well as your relative ranking compared to other students
  • An approximate 3-digit USMLE score based on historical UWorld data

New! UWorld Self-Assessment #3 Just Released.

NEW! ReadyDecks™ & SmartCards

Reinforce key Step 2 clinical concepts by reviewing our ReadyDecks, 2k+ premade flashcards carefully curated by the same team that designed your QBank. This material features all new pathology, histopathology, clinical, and radiology images.

  • Pair this high-yield content with custom SmartCards that you create in real-time as you progress through your QBank.
  • Both ReadyDecks and SmartCards offer “Study” mode, which uses research-backed, spaced-repetition technology for enhanced retention.

Biostatistics Review

Understanding biostatistics and epidemiology is necessary to review research and the medical literature. These subjects are also tested on the USMLE, in-service exams, and board certification exams. Our review will help you:

  • Efficiently learn important concepts and strengthen your fundamental knowledge
  • Apply your knowledge in exam scenarios through basic and advanced vignettes
  • Practice confidently with detailed, step-by-step calculations
  • Increase your comprehension by integrating material from related questions

Prepare on the Go

Having the flexibility to study on your laptop, tablet, or smartphone is a major benefit when balancing rotations with shelf exam and Step 2 CK prep. That’s why we made our full Step 2 question bank and active-learning tools available through the UWorld Medical app. Simply download the app and log into your account to get started. All of your progress will automatically save and sync across devices to ensure a seamless study experience.

App Store Google Play

USMLE Step 2 CK QBank Pricing

Questions about subscriptions/renewals? Click here.
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Include ReadyDeck Premade Flashcards $39
*Each self-assessment has a duration of two weeks from its date of activation.

Step 2 Institutional Pricing

We partner with academic programs to offer bulk pricing on our suite of medical exam prep solutions. We’ll work with you to create a package that fits your students’ needs and institution’s goals.

Frequently Asked Questions

UWorld Step 2 CK practice questions and shelf exam questions are designed to be at or above their corresponding exam’s difficulty level to offer a realistic testing experience and quality learning environment. Our shelf exam questions and explanations are oftentimes more detailed than what you would see in a typical Step 2 CK course to correlate with what’s tested on those exams.

The UWorld Step 2 question bank consists of over 4,300 USMLE Step 2 sample questions written by practicing physicians. This includes questions specific to your shelf exams. We regularly update our QBank to guarantee coverage of the full USMLE Step 2 syllabus.

Shelf or subject exams are a critical part of clinical rotations. Because many of their topics are also tested on Step 2 CK, our Step 2 question bank allows users to toggle between “Shelf Review” and “Step 2 Review.”

  • Shelf Review categories: Ambulatory medicine, clinical neurology, emergency medicine, family medicine, internal medicine, obstetrics and gynecology, pediatrics, psychiatry, and surgery

Both testing modes organize content based on their respective exams. Due to their overlap, completing related questions in one mode will mark them as complete in the other. However, some shelf exam questions offer detail beyond what you need to know for Step 2 in order to meet common shelf exam requirements.

UWorld Step 2 CK practice tests feature four 60-minute blocks, with each block consisting of 40 multiple-choice questions not found in our QBank. This mirrors the real USMLE, which is divided into eight 60-minute blocks with up to 40 questions in each.
Traditionally, a roughly 40% UWorld Step 2 CK QBank score has resulted in a passing score on the USMLE Step 2 CK. However, because the exam’s passing standard was bumped up by five points in 2022, we suggest aiming closer to 45% or 50% in your UWorld Step 2 QBank.

Whether or not you should reset your Step 2 CK QBank comes down to preference. Most students will complete a first pass of the QBank and then return to incorrect and omitted questions before considering a reset. If you do choose to reset your QBank, take into account how much time you have before your exam for additional practice and make sure to avoid burnout.

Given the volume of available questions, we suggest targeting specific sections you struggle with if you choose to utilize a reset. Also, remember that any questions you answered in “Shelf Review” will be marked as complete in “Step 2 Review,” so it might be worth revisiting those areas. If you’re short on time, it may be better to simply practice with your spaced-repetition flashcards and self-assessments.

Yes, we have started incorporating more “H&P-style” (i.e., history and physical-style) questions into our Step 2 QBank. These questions simulate the experience of reading a patient’s chart, and are in response to the NBME adding questions of this style to the Step 2 examination. The explanations for these questions are arranged in the same style as other UWorld rationales.
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Total QBank Questions: 1,816



Frequently Asked Questions

New Purchase: All new subscriptions go into effect from the time they are activated and not at the time of setup/purchase. A subscription can be activated immediately or any time thereafter. If your initial purchase consists of multiple courses (Qbank, Self-Assessment exam, CCS, etc.), each can be activated individually and independently via your account on our website. This process of activating a subscription after purchase allows you the flexibility to start a subscription when you are truly ready to use it.

We recommend that all subscriptions be activated within 180 days of setup/purchase. Once a subscription is activated, it cannot be paused or suspended for any reason and will run continuously for the duration of the course material.

Renewal: A renewal is an extension of time to continue access to a current activated subscription. Because a renewal is an extension to an already active subscription, it is effective from the existing expiration date, not from the day of purchase and cannot be deferred to start at a later date/time.

Note: All of our subscriptions are based on the Eastern Time Zone (GMT/UTC -5 hours or New York Time), which may be different than your local time zone.

Any of our product offerings can be purchased from our website with payment due in full at time of purchase via a credit or debit card with American Express, Discover MasterCard, or Visa logo.

You will need to register for an account in order to purchase any of our products. Once you have registered for an account or if you already have an account:

  • Log in to your UWorld account
  • Click on the Cart icon at the top of the page and then select your desired product to see a list of available packages and their prices
  • Select the package you wish to purchase
  • Verify your profile information, address, and educational status, then click the Update button
  • Enter your Billing address and credit/debit card information, then click Review Order
  • Verify that the correct product is in your cart and click Place Order
  • A purchase receipt will automatically be sent to your registered email address

If you complete your purchase but do not receive a receipt, please contact the Customer Care Team at [email protected]

You can subscribe to any of our online courses/services using a credit or debit card with a Visa, MasterCard, Discover or American Express logo. After a successful payment, your subscription will immediately
be available for activation via your account on our website or available complementary mobile applications.

You can also subscribe via personal check, money order, or demand drafts taken in U.S. dollars. These types of payments should be mailed to us and should include the name of the subscription and the duration,
along with the details asked for in the registration form. We will set up your account as soon as we receive
your payment and notify you via email of your access credentials. All direct-mail payments must be in U.S. dollars and made payable to:

UWorld, LLC
9111 Cypress Waters Blvd
Suite 300
Dallas, TX 75019

We do not accept cash via mail, currencies other than U.S. dollars or payments via fax.

Individuals purchasing our CPA Review product may finance their purchase using Affirm during checkout process. Your eligibility depends on your credit score and other criteria, as per Affirm’s policies (outlined here). A soft credit check, a credit check that does not affect your credit score, will be performed by Affirm to determine your loan eligibility.
You will need a US based bank account to qualify.

All refunds are evaluated on a case-by-case basis for products purchased directly from UWorld. One case has no bearing on another. Refund amounts determined by UWorld are final.

In-App Purchases: We are unable to process any refunds for purchases made via mobile application (in-app). Please contact Apple for all refund/credit requests for Apple in-app purchases.

USMLE Step 2 CS, Step 3 CCS, Subject Reviews & Self-Assessment Exams: These subscriptions are non-refundable, non-transferable, and cannot be converted into another subscription.

CPA Review: Students may request to cancel their CPA review product only within 10-days of activation of any of the materials. To qualify for a refund, no more than 10% of the course (lectures, Qbank, or a combination there-of) may have been used per exam section. All CPA Review refunds are subject to a cancellation fee of $75 (for single section purchases) or $250 (for package purchases), plus any applicable shipping charges. No return of merchandise is necessary.

All other Qbanks: Refunds are considered for subscriptions of more than 30 days. Refund amounts are based on the number of days elapsed since the subscription start date or the number of questions used, whichever amounts to a higher deductible.

Example scenarion: An individual purchases a 180-day Qbank subscription and generates a few test blocks equal to 20% of the questions in the Qbank. After 45 days, he/she requests a refund. Because the elapsed duration is greater than the percentage of questions used, the refund amount will be based on a subscription converted to the closest duration (60 days) by deducting the applicable 60-day subscription fee from the refund. In the same scenario, if the individual had used 85% of the questions, the refund would be 15% of the subscription fee paid.

Note 1: A processing fee of 10% (minimum of $10 and maximum of $25) will be applied to all refund amounts.

Note 2: All refunds, pro-rated or otherwise, must be requested within 360 days of original purchase. Refunds for purchases made more than 360 days ago will be issued as non-refundable, non-transferable store credit.

Note 3: Subscribers must notify UWorld of their intent to obtain a refund before activating their subscription (or) during the active duration. If the reset option is used or all of the questions are used, no refund will be allowed (see “I want to reset/delete my Qbank test history (or) start all over again, is this possible?” below for further details). No refunds will be offered for expired subscriptions.

Note 4: For combination package purchases, individual subscription fees will be applied when calculating the refund. If any self-assessment Exam(s) is utilized from a package, the entire purchase is rendered non-refundable.

Note 5: Although access to Qbanks via certain mobile devices is provided as an additional feature, it is not intended to be a replacement for computer access, and no refunds or cancellations will be honored due to user inability to install and/or use the provided software on any mobile device (regardless of whether the device meets the minimum system requirements).

Please use the following steps to purchase a renewal for your subscription:

  • Log in to your account on our website
  • Click on the User Icon in the top right corner of the screen
  • Click on the Renew button corresponding to your subscription
  • Select the Renewal duration you wish to purchase
  • Verify your profile information, address, and educational status, then click the Update button
  • Enter your Billing address and credit/debit card information, then click Review Order
  • Verify that the correct package is in your cart and click Place Order

Upon a successful transaction, you will be sent a confirmation email receipt.

A renewal is an extension of time to continue accessing an active subscription, and it will not start the subscription over, provide a reset, or grant access to additional questions
that were not previously accessible. Because a renewal is an extension to an already active subscription, it is effective from the existing expiration date, not from the date of purchase, and
cannot be deferred in any way to start at a later date/time.

Please note that to qualify for renewal pricing, you will need to renew the course before it expires. Renewals are not offered to expired subscriptions. If you fail to secure
a renewal before the expiration date, you will need to purchase a new subscription at the regular price directly from our website to regain access to the material.

Note: All times and dates displayed for subscription expiration correspond with the Eastern Time Zone (GMT/UTC -5 hours or New York Time), which may be different than your
local time zone.

Note: If your initial purchase was a combination package, you will need to renew each active subscription individually. You do not need to renew a course that has not been

You may request to upgrade or downgrade your subscription purchase as long as it has not been activated. If you purchase a combination package, all included subscriptions must be unused. Please be advised that current subscription pricing will apply.

If your subscription has been activated, unfortunately, we cannot upgrade it retroactively. If seeking to downgrade, please refer to our refund policy for available options.

We do not offer custom duration(s) or combination packages other than those outlined on the website. Please refer to our purchase page for currently available subscriptions (including discounted combination packages for some products).

Self-Assessment exam subscriptions are for 14 days each. Subscribers whose active subscription(s) have not expired can purchase renewals from 7 days or more at any time before
their active subscription expires. Please refer to the respective course description page for renewal options.

We offer a demo on each of our product pages that contains a sample of the product interface and a few sample questions. We do not offer guest/trial accounts to test our software and view materials.

It is possible to purchase a subscription as a gift for someone else. However, the intended recipient will need to register
an account on our website (or have an account registered for them, with their profile information entered accurately). If the user is present at the time of purchase, the purchase can be made from their
account on our website using any credit or debit card with a Visa, MasterCard, American Express, or Discover logo.

If the user is not present, or you wish for the gift to be a surprise, please contact Support directly using the contact form to arrange payment for the gift subscription. You will need to provide the user’s
registered email address so the account can be located.

Renewal Instructions

  •   Please purchase a renewal using the "Renew" option from the My Account page
  •   To qualify for renewal pricing, course must be renewed before it expires
  •   All renewals are effective from the current expiration date and cannot be deferred
  •   Test information cannot be reset (deleted) with renewal unless eligibility criteria is met (see Help page)