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What We Do

The College of Medical Laboratory Technologists of Ontario (CMLTO) is the regulatory body for medical laboratory technologists (MLTs) in Ontario.The CMLTO exists to ensure the public receives quality laboratory services from competent and ethical professionals.

Ontario’s approximately 7,000 MLTs are highly trained professionals on the health care team. Every day in Ontario, MLTs perform nearly half a million lab tests on blood, body fluids and tissues.

MLTs may practise in specialized areas like transfusion science (e.g., performing tests associated with tissue and organ transplant), genetics (e.g., studying chromosomes, DNA and RNA from cells of body fluids and tissues to diagnose genetic diseases) and cytology (e.g., studying and identifying normal and cancerous cells). The results from these tests help other medical practitioners diagnose, treat and monitor many medical conditions.

The CMLTO ensures you can have confidence in MLTs doing your lab tests. Qualified individuals must be registered with the CMLTO to work as MLTs in Ontario. As regulated health professionals, MLTs are held accountable for their conduct and practice.

MLTs are one of 29 health professions granted self-regulation under the Regulated Health Professions Act, 1991. Doctors, nurses, pharmacists, and other professionals are also regulated under this act.

The CMLTO sets the requirements for entry to practice to the profession and the standards of practice within the profession. The CMLTO also investigates complaints regarding the conduct of medical laboratory technologists in Ontario.


Equity, Diversity, Inclusion and Justice at the CMLTO

Recognizing the significant impact of equity, diversity, inclusion and justice matters in our society and the potential for impacts and implications for all Boards of Directors, including those in the health regulatory sector, the CMLTO Board of Directors has set the following goal:


“To begin, together as a Board, the learning process around Equity, Diversity, Inclusion and Justice matters including the issues/concerns, the impact and action needed by the Board, and the related influence/direction the Board wishes to have on CMLTO as an organization.”


The CMLTO Board of Directors embedded this in its work and planning for 2022 and beyond to further understand these important concepts and the resulting values which should become part of CMLTO’s core beliefs, organizational DNA, and way of doing business.

As a direct result of their work on these important topics this year, the Board approved an Equity, Diversity, Inclusion and Justice Plan, which can be found here.

An action plan based on the Board’s principles will be established in 2023 to advance the Board’s focus. This plan will be released publicly as it is developed and approved to ensure that the public, registrants and all stakeholders understand the Board’s direction transparently.

Feedback regarding the CMLTO Board of Director’s equity, diversity, inclusion and justice principles, and plan are welcome from the public, registrants and stakeholders at any time.

Please send your questions, comments and feedback to This e-mail address is being protected from spambots. You need JavaScript enabled to view it .