American College of Histocompatibility and Immunogenetics (ACHI) · Verified for 2026-10-13 against ACHI's currently linked CHS Exam Content Outline and Examination Candidate Handbook, latest update January 2026. The outline filename identifies revision 20250321; its page does not state an effective date. The workbook label matches the official credential name; the assigned slug is preserved.

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

• ACHI Resource Hub
• ACHI Technologist Examinations
• ACHI Examination Candidate Handbook, January 2026
• ACHI Certified Histocompatibility Specialist Exam Content Outline
• HLA Nomenclature: Naming Alleles
• HLA Nomenclature: G Groups
• IPD-IMGT/HLA Database
• Guidance Document for OPTN Histocompatibility Laboratory Bylaws and Policies
• Quantitative Evaluation of the Impact of Ethylenediaminetetraacetic Acid Pretreatment on Single-Antigen Bead Assay
• UCSF Chimerism Testing and Engraftment Monitoring
• DIAGAST Blood Grouping Reagents Anti-A, Anti-B and Anti-A,B: Package Insert
• NMDP: What Is HLA?
• RCSB PDB 1HLA: Human Class I Histocompatibility Antigen HLA-A2
• RCSB PDB 1DLH: HLA-DR1 Complexed with an Influenza Virus Peptide
• Banff Foundation: Reference Guide to the Banff Classification
• Abacavir and Lamivudine Tablets: Prescribing Information
• 42 CFR 493.1242: Specimen Submission, Handling and Referral
• 42 CFR 493.1291: Test Report
• CMS: Verification of Performance Specifications
• CMS: Proficiency Testing and PT Referral
• CMS: Assessing Personnel Competency
• CDC/CMS: Developing an IQCP—A Step-by-Step Guide
• CMS: Calibration and Calibration Verification