American Society for Clinical Pathology Board of Certification (ASCP BOC) · Current ASCP BOC Medical Laboratory Scientist examination content guideline, revised September 25, 2025, consulted October 13, 2026. A separate effective date is not stated. The workbook label Clinical Laboratory Scientist (CLS) is mapped through the documented former CLS(NCA) credential to its MLS(ASCP) successor following the 2009 NCA–ASCP BOR unification. The assigned slug is preserved; CLS is not presented as a separate current national certification examination.

This original 20-question sample covers selected topics across the outline. It does not reproduce official exam questions or cover every tested topic.

• Medical Laboratory Scientist, MLS(ASCP) and MLS(ASCPi): Examination Content Guideline
• Standardizing the Professional Title of Medical Laboratory Professionals
• Medical Laboratory Scientist
• Canadian Blood Services: Pre-transfusion testing
• Canadian Blood Services: Irradiated, washed and CMV seronegative blood components
• ARUP Consult: Hemolytic Anemias
• Mayo Clinic Laboratories: Phlebotomy Top Gun—Order of Draw
• Mayo Clinic Laboratories: Top Gun Phlebotomy—Pseudohyperkalemia
• NIDDK: The A1C Test & Diabetes
• Mayo Clinic Laboratories: GLURA—Glucose, Random, Serum
• Mayo Clinic Laboratories: BILI3—Bilirubin, Serum
• CDC NHANES: Complete Blood Count using HMX, 2011–2012
• ICSH recommendations for the performance and interpretation of APTT and PT mixing tests
• CDC: Clinical and Laboratory Diagnosis for Tuberculosis
• CDC DPDx: Malaria
• CDC DPDx: Blood Specimens—Microscopic Examination
• CDC: Clinical Testing and Diagnosis for C. diff Infection
• CDC: Identification of C. auris
• CDC DPDx: Giardiasis
• CDC: Clinical Testing and Diagnosis for Hepatitis B
• Siemens Healthcare Diagnostics: Multistix 5 Reagent Strips Instructions
• WHO Laboratory Quality Management System Training Toolkit: Quantitative QC Content Sheets