ASCP MLS (Medical Laboratory Scientist)

ASCP MLS (Medical Laboratory Scientist)

Global Gold Standard for Medical Laboratory Professionals

150 minutes
Pass Score: 75%
Next available June 24, 2025
Price
Personalized Quotes
Delivery Method
In-Person
Exam Description

The ASCP Board of Certification exam for Medical Laboratory Scientists (MLS) validates the knowledge and skills required to perform diagnostic laboratory testing in clinical settings. It covers all major lab disciplines, including hematology, microbiology, chemistry, and blood banking, and is recognized internationally.

Question Format

Breakdown of exam question types and quantities

Multiple Choice
125
questions
Total Questions125
Knowledge & Skills

Exam domains and their weightings

Exam Preparation

Recommended study resources and preparation methods

ASCP BOC Study Guide (5th Edition)
MLS Online Review Courses
LabCE, Mometrix, and MediaLab practice tools
Retake Policy

Guidelines for exam retakes and waiting periods

45-day wait before retake Maximum: 5 attempts Must reapply and pay the full exam fee each time

Frequently Asked Questions

Common questions about this exam

Registration Information
Next DateJune 24, 2025
PricePersonalized Quotes
Duration150 minutes
Passing Score75%
Prerequisites

Requirements before taking this exam

Applicants must meet Route 1 or alternative pathways, typically including:Bachelor’s degree in medical laboratory science or biological science
Completion of NAACLS-accredited MLS program
International applicants: credential evaluation + equivalent academic and clinical training
Delivery Method

How this exam is administered

In-Person

This exam must be taken at an authorized testing center

Testing Provider

About your testing partner

Pearson VUE

Pearson VUE

Authorized Testing Provider