MLT (ASCP) Exam Pass Rate, Format & Study Guide

The ASCP BOC content guideline (revised September 25, 2025) describes the MLT exam as 100 multiple-choice questions with four options and one best answer, delivered by computer adaptive testing in 2 hours 30 minutes; the portal mock uses 100 questions and 150 minutes. Content areas and shares: Blood Banking 17 percent, Urinalysis and Other Body Fluids 7, Chemistry 23, Hematology 23, Immunology 7, Microbiology 17 and Laboratory Operations 6. ASCP BOC reports a scaled score from 100 to 999 with a minimum passing score of 400; no set number or percentage of correct answers is required, and the exam includes unscored field-test questions whose number is not published.

MLT(ASCP) is a widely recognised certification for medical laboratory technicians and some employers and states require or prefer it.

Medical laboratory technician students, graduates and working technicians preparing for the MLT(ASCP) exam.

The certifying body does not publicly publish an official pass rate for this exam. Be wary of third-party sites citing a specific number here — treat any pass-rate claim you see elsewhere for this exam as unverified.

ASCP BOC limits the number of attempts for each eligibility route and requires a new application and fee for each attempt; confirm the current rule on the ASCP BOC site.

ASCP BOC reports a scaled score of 100 to 999 and the minimum passing score is 400; the exam is adaptive, so there is no fixed number of correct answers. The portal mock shows a percent score only as a pacing and knowledge self-check, not a prediction. Format: 100 questions in 2 hours 30 minutes, computer adaptive; the portal mock is a fixed 100-question set in 150 minutes. No official pass rate is available for this exam, so none is quoted here.

The ASCP BOC content guideline (revised September 25, 2025) describes the MLT exam as 100 multiple-choice questions with four options and one best answer, delivered by computer adaptive testing in 2 hours 30 minutes; the portal mock uses 100 questions and 150 minutes. Content areas and shares: Blood Banking 17 percent, Urinalysis and Other Body Fluids 7, Chemistry 23, Hematology 23, Immunology 7, Microbiology 17 and Laboratory Operations 6. ASCP BOC reports a scaled score from 100 to 999 with a minimum passing score of 400; no set number or percentage of correct answers is required, and the exam includes unscored field-test questions whose number is not published. 100 multiple-choice questions · 2 hours 30 minutes · computer adaptive · scaled score 100 to 999 · four options per question. ASCP BOC reports a scaled score of 100 to 999 and the minimum passing score is 400; the exam is adaptive, so there is no fixed number of correct answers. The portal mock shows a percent score only as a pacing and knowledge self-check, not a prediction.

• Blood Banking17%
• Urinalysis and Other Body Fluids7%
• Chemistry23%
• Hematology23%
• Immunology7%
• Microbiology17%
• Laboratory Operations6%

The content outline spreads questions across 7 areas: Blood Banking (17.0%); Urinalysis and Other Body Fluids (7.0%); Chemistry (23.0%); Hematology (23.0%); Immunology (7.0%); Microbiology (17.0%); Laboratory Operations (6.0%).

ASCP BOC lists several routes, usually combining an accredited program, a degree or military training with clinical laboratory experience. Confirm your route and the required documents on the ASCP BOC site.

ASCP BOC charges one application fee per attempt; the amount differs for U.S. and international applicants. Confirm it with ASCP BOC before you apply.

ASCP BOC certifications are maintained through its Credential Maintenance Program; check the ASCP BOC site for the current cycle and requirements after you pass.

Start with the heaviest areas of the content outline: Chemistry (23.0%); Hematology (23.0%); Blood Banking (17.0%). Then work through the remaining areas, and finish with timed full-length practice runs of 100 questions in one sitting.

This guide follows the MLT(ASCP) and MLT(ASCPi) examination content guideline revised September 25, 2025 and the ASCP BOC examination process pages; check ascp.org before you apply.