NBME CBSSA

Pick by target exam, not by reputation. The NBME maps each product to one exam: Comprehensive Basic Science for Step 1, Comprehensive Clinical Science for Step 2 CK, Comprehensive Clinical Medicine for Step 3, Clinical Mastery Series for an NBME Clinical Science Subject Exam, and IFOM Clinical Science for the IFOM Clinical Science Exam. Choose the one matching the exam you have scheduled.

No. The NBME describes self-assessments as a way to evaluate readiness and practice for the USMLE, an NBME Subject Exam, or the IFOM Exam. They are preparation tools, not the licensing examination itself, and completing one does not register you for or count toward any official exam result.

The available source material identifies multiple choice as the format and does not describe any other item type for these products. Item counts per assessment, section structure, and the presence of any unscored items are not stated in the source and could not be verified, so check the product page for your specific self-assessment before purchasing.

These details could not be verified. The CBSSA product page returned a 404 error when checked on 2026-11-06, and the source text does not state timing, number of items, score scale, or score reporting for any self-assessment. Treat any figure you see elsewhere as unconfirmed and confirm directly with NBME before you plan around it.

The source does not state a price for any self-assessment, so no fee is given here. Each product page carries a "Buy Now" link, which is where current pricing is presented. Pricing can change, so verify at the point of purchase rather than relying on a figure quoted in a forum or an older study plan.

The source does not describe a retake policy. Practically, candidates often purchase a different form or repeat an assessment later in preparation, but whether a specific form can be repurchased or reused is not documented in the available material. Confirm with NBME Customer Services before assuming a retake is available.

Take it early enough that the result can still change your plan, and treat it as a diagnostic rather than a final verdict. Sit it in one block under exam-like conditions, then sort missed items by discipline and by error type, whether content gap, misread question, or rushed reasoning. Spend the following weeks on the largest categories.

Three recur. Taking one too late to act on the results. Taking it in fragments with notes open, which inflates the score and hides weak areas. And treating the score as a prediction rather than a map, so the same weak topics persist into the real exam. Review every explanation, including for items you answered correctly by guesswork.

Yes, but only the matching product. The IFOM Clinical Science Self-Assessment is described as being for students planning to take the IFOM Clinical Science Exam. The Step 1, Step 2 CK, Step 3, and Clinical Science Subject Exam self-assessments are each tied to their own target exam, so using the wrong one gives you a misaligned practice experience.

No. This page is independent study material and is not affiliated with, endorsed by, or sponsored by the NBME. NBME, USMLE, and IFOM are trademarks of their respective owners and are used here only to identify the assessments being discussed. Always confirm current product details on the official NBME site.