California Occupational Guides

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Detailed Guide for

Medical and Clinical Laboratory Technicians in California

May also be called: Histologic Technicians; Laboratory Assistants; Laboratory Associates; Laboratory Technicians; Medical Laboratory Technicians (MLTs); Phlebotomists; Toxicology Laboratory Technicians

What Would I Do?

Laboratory testing plays a crucial role in the detection, diagnosis, and treatment of disease. Medical and Clinical Laboratory Technicians collect, examine, and analyze bodily fluids, tissue samples, blood, and other substances. They may also cut and stain tissue specimens for microscopic examination by pathologists. They use a variety of techniques to detect bacteria, viruses, fungus cells, cancer cells, and other agents of disease. These workers are often referred to as Medical Laboratory Technicians (MLTs) in the State of California. They work under the supervision of a licensed physician, surgeon, doctoral scientist, pathologist, clinical laboratory bioanalyst, clinical laboratory scientist, or a clinical laboratory specialist.

Medical Laboratory Technicians may prepare specimens, operate automated analyzers, or they may perform manual tests in accordance with detailed instructions.

Medical Laboratory Technicians may work in several areas of the clinical laboratory or specialize in just one. For instance, Phlebotomists collect blood samples from patients, and Histotechnicians cut and stain tissue specimens for microscopic examination by pathologists.

Tools used include microscopes, cell counters, and other sophisticated laboratory equipment. They may also use automated equipment and computerized instruments capable of performing a number of tests simultaneously. After testing and examining a specimen, they analyze the results and relay them to physicians.

Important Tasks and Related Skills

Each task below is matched to a sample skill required to carry out the task.

View the skill definitions
TaskSkill Used in this Task
Analyze the results of tests and experiments to ensure conformity to specifications, using special mechanical and electrical devices.Deductive Reasoning
Conduct blood tests for transfusion purposes and perform blood counts.Quality Control Analysis
Examine cells stained with dye to locate abnormalities.Inductive Reasoning
Collect blood or tissue samples from patients, observing principles of asepsis to obtain blood sample.Monitoring
Analyze and record test data to issue reports that use charts, graphs and narratives.Clerical
Conduct chemical analyses of body fluids, such as blood and urine, using microscope or automatic analyzer to detect abnormalities or diseases, and enter findings into computer.Medicine and Dentistry
Consult with a pathologist to determine a final diagnosis when abnormal cells are found.Speaking
Analyze the results of tests and experiments to ensure conformity to specifications, using special mechanical and electrical devices.Science
Set up, adjust, maintain and clean medical laboratory equipment.Equipment Maintenance
Source: U.S. Department of Labor Occupational Information Network (O*NET)

Working Conditions

Medical Laboratory Technicians generally work in well-lit, well-equipped, and temperature-controlled laboratories. In addition, the laboratories are usually clean; however, specimens, solutions, and reagents used in experiments sometimes produce toxic or unpleasant fumes. Technicians may also work in hospitals, clinics, doctors' offices, blood banks, or stand-alone laboratories.

Technicians often spend a great deal of time on their feet. Those who work with infectious specimens must use proper methods of infection control and sterilization so that hazards are minimized. Protective masks, gloves, and goggles often are necessary to ensure their safety.

Medical Laboratory Technicians who work in hospitals or larger medical laboratories often work day, evening, or graveyard shifts and may work on weekends and holidays. Those who work in smaller facilities may work rotating shifts, rather than regular shifts. In some laboratories, Technicians may work on-call several nights a week or on weekends, in case of an emergency.

Some Medical and Clinical Laboratory Technicians are represented by labor unions such as the Service Employees International Union.

Will This Job Fit Me?

Medical Laboratory Technicians work with practical, hands-on problems and solutions. They work more with tools and equipment rather than with people. An exception to this would be Phlebotomists, who work directly with patients. This job also attracts workers who enjoy working with ideas and engaging in extensive amounts of thinking and problem solving.

Technicians need good analytical judgment and the ability to work under pressure. Close attention to detail is essential because small differences or changes in test substances or numerical readouts can be crucial for patient care. Manual dexterity and normal color vision are highly desirable. With the widespread use of automated laboratory equipment, computer skills are important.

What Wages and Benefits Can I Expect?

Medical Laboratory Technicians may receive additional pay when working on-call, overtime, irregular shifts, or weekends. The highest wage earners for this large group are Histotechnicians, with the lowest wages generally paid to Phlebotomists.


The median wage in 2021 for Medical and Clinical Laboratory Technicians in California was N/A annually. The median is the point at which half of the workers earn more and half earn less.

Annual Wages for 2021Low
(25th percentile)
(50th percentile)
(75th percentile)
Source: EDD/LMID Occupational Employment Statistics Survey, 2021 Wages do not reflect self-employment.
View Wages for All Areas


Medical Laboratory Technicians generally receive benefits such as medical, dental, life, and vision insurance as well as vacation, sick leave, and retirement plans. Some may receive uniforms.

What is the Job Outlook?

The job prospects for Medical Laboratory Technicians are very good. New, increasingly powerful diagnostic tests should encourage additional testing and stimulate employment growth. In addition, the volume of laboratory tests continues to increase with population growth.

On the other hand, the opposing effects on employment growth include technological advances and the efforts made in research and development to simplify routine testing procedures. This allows the opportunity for non-laboratory personnel to perform tests generally conducted by MLTs.

Most jobs will continue to be in hospitals, but employment is projected to grow faster in other settings, such as medical and diagnostic laboratories, offices of physicians, and all other ambulatory health care services.

Projections of Employment

How Do I Qualify?

Education, Training, and Other Requirements

Medical Laboratory Technicians must possess an associate degree in chemical, physical, biological, or clinical laboratory science, including a minimum of 36 semester units of physical or biological science from an accredited college or university. They must also have fulfilled one of the following requirements:

  • Have graduated from a medical laboratory technician training program recognized by the National Accrediting Agency for Clinical Laboratory Sciences (NAACLS), the California Department of Public Health (CDPH), or the United States military.

  • or
  • Have met admission requirements for the clinical laboratory scientist licensing examination as determined by the CDPH.

  • or
  • Have completed a minimum of three years (within the past five years) experience as an MLT or a clinical laboratory scientist in either a California physician's office laboratory or a clinical laboratory owned and operated by the U.S.

In addition to these requirements, MLTs must also pass the Medical Laboratory Technician Certifying Organization examination in order to apply for licensure and work in the State of California.


Employers usually prefer hiring MLTs with previous clinical laboratory experience. Experience with computers is also preferred.

Early Career Planning

Students who are interested in this field should take biology, chemistry, mathematics, physics, English, foreign language, and computer courses.

Work Study Programs

California offers Regional Occupational Programs (ROP) for MLTs. One such program is titled Clinical/Medical Laboratory Technician. To find an ROP program near you, go to the California Association of Regional Occupational Centers and Programs Web site.

Continuing Education

Medical Laboratory Technicians must complete 12 hours of continuing education each year as a condition for license renewal.

Licensing and Certification

Medical Laboratory Technicians must be licensed to work in the State of California. To obtain licensure, applicants must submit an MLT license application and pay the appropriate fees as well as pass the Medical Laboratory Technician Certifying Organization examination administered by the American Association of Bioanalysts (AAB) or the American Society of Clinical Pathologists (ASCP). The licensing process generally takes 150 days once the completed MLT license application and official documents, such as college transcripts or documentation of MLT training or experience, is received. In addition, candidates must renew their licenses every two years. Contact the agency that issues the license for additional information. Click on the license title below for details.

Certification may be a prerequisite for jobs and is often is necessary for career advancement. Medical Laboratory Technicians may hold one or several certificates such as Medical Laboratory Technician, Phlebotomy Technician, Pathologist Assistant, Patient Care Technician, and Registered Vascular Technologist. Some employers require MLTs to be certified in cardiopulmonary resuscitation (CPR). For more information, go to the U.S. Department of Labor's Career InfoNet Web site and scroll down to "Career Tools." Click on "Certification Finder" and follow the instructions to locate certification programs.

Where Can I Find Training?

There are two ways to search for training information:

  • Search by Field of Study to find what programs are available and what schools offer those programs. You may use keywords such as: Clinical Laboratory Technician or Medical Laboratory Technician.
  • Search by Training Provider to find schools by name, type of school, or location.

Contact the schools you are interested in to learn about the classes available, tuition and fees, and any prerequisite course work.

Where Would I Work?

Finding a Job

Direct application to employers remains one of the most effective job search methods. Hospitals advertise openings in newspaper classified ads, Internet job listings, and some also recruit through private employment agencies. Job seekers should apply directly to hospital personnel departments throughout California. Other job search methods include using a college job placement office, attending a job fair, and joining a professional society, especially one that provides services and attention to students. Online job opening systems include JobCentral at and CalJOBSSM at

To find your nearest One-Stop Career Center, go to Service Locator. View the helpful job search tips for more resources. (requires Adobe Reader).

Yellow Page Headings

You can focus your local job search by checking employers listed online or in your local telephone directory. Below are some suggested headings where you might find employers of Medical and Clinical Laboratory Technicians.

  • Doctor's Offices
  • Hospitals
  • Laboratories, Pathological, Analytical
  • Medical Clinics

Find Possible Employers

To locate a list of employers in your area, go to "Find Employers" on the Labor Market Information Web site:

  • Select one of the top industries that employ the occupation. This will give you a list of employers in that industry in your area.
  • Click on "View Filter Selections" to limit your list to specific cities or employer size.
  • Click on an employer for the street address, telephone number, size of business, Web site, etc.
  • Contact the employer for possible employment.

Where Could This Job Lead?

With additional education and experience, Medical Laboratory Technicians can advance to clinical laboratory scientists. Some Technicians gain experience on the job and become supervisors or lab managers. Manufacturers sometimes hire Technicians to help develop or refine medical devices. Some also work in sales and marketing.

Related Occupations

Below is a list of occupations related to Medical and Clinical Laboratory Technicians with links to more information.

Biological TechniciansGuide
Chemical TechniciansGuide
Medical and Clinical Laboratory TechnologistsGuide
Medical AssistantsGuide
Nuclear Medicine TechnologistsGuide
Respiratory Therapy TechniciansProfile

Other Sources

  • California Department of Public Health
  • American Association of Bioanalysts, Board of Registry
  • American Society for Clinical Laboratory Science
  • National Accrediting Agency for Clinical Laboratory Sciences

These links are provided for your convenience and do not constitute an endorsement by EDD.

For the Career Professional

The following codes are provided to assist counselors, job placement workers, or other career professionals.

SOC - Standard Occupational Classification29-2012
O*NET - Occupational Information Network
   Medical and Clinical Laboratory Technicians29-2012.00
   Interest Codes (RIASEC)RIC
CIP - Classification of Instructional Programs
   Clinical/Medical Laboratory Technician 511004
   Clinical/Medical Laboratory Science & Allied Professions, Ot511099
TOP - Taxonomy of Programs (California Community Colleges)
   Medical Laboratory Technology120500
   Orthopedic Assistant121400