NBOME mail


A self-paced assessment series used as a COMLEX-USA and COMSAE preparation tool.

The WelCOMTM assessment series is offered on the CATALYST platform and provides osteopathic medical students and residents with the opportunity to reinforce their medical knowledge, determine which areas of COMLEX-USA Levels 1 and 2-CE they are strongest in, and prepare accordingly.

WelCOM “welcomes” students into the early stages of preparation for each level of the COMLEX-USA examinations, providing 75 test questions that reflect the style and subject matter of COMLEX-USA. WelCOM content is designed for osteopathic medical students and residents as they begin their preparation for each level of the licensure examination.

WelCOM can prepare you for both COMSAE and COMLEX-USA with additional learning resources. After responding to each WelCOM question, candidates are shown the correct answer, the rationale for why that answer is correct, and are provided additional references for further study.

Unlike traditional examinations that give you a one-time snapshot of your performance after you’ve completed the exam, WelCOM uses an easy-to-read Review panel that provides real-time progress to help you close the gaps in your knowledge.

Just as important, WelCOM is convenient, accessible 24/7 on your smartphone tablet, desktop, or on the CATALYST app. It’s also customizable; you can answer one question, or as many as you like, on your own time.

CATALYST Dashboard on Mobile

CATALYST Demo on Mobile App

CATALYST Settings Tab



Phase Questions/Rationales Per Form
Phase 1 - Number of Forms 2 75
Phase 2 - Number of Forms 4 75


Comparing WelCOM and COMSAE

# of Questions 75 176
Available for Purchase By Students Students or COMs
Questions Interval Self-Determined Single-Sitting
Scoring Correct / Incorrect Provided in Real Time Total Score Provided at Completion of Assessment
Answer Rationales YES No
Reference/Resource Material YES No
Performance Dashboard YES No
Cost $60 $60