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Allied Health Professions • Field guide

Laboratory, Pathology, and Blood Sciences

Laboratory professionals study small samples of blood, urine, cells, or tissue. Their work helps the care team learn what is happening inside a patient’s body. Some collect samples directly from patients; others prepare or test them in a laboratory.

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Laboratory, Pathology, and Blood Sciences

Cytologist

Cytotechnologist

Examines cellular material for abnormalities associated with cancer, infection, and other disease processes.

The work and its responsibilities

Work settingsCytology and pathology laboratories
Patient contactUsually centered on cellular specimens
Scientific focusCell biology, microscopy, and abnormal cellular patterns

An illustrative work example

A cellular sample requires close examination and careful documentation. The work demands sustained attention because small differences in appearance may matter to the clinical team.

Actual duties depend on training, specialty, workplace, and applicable rules. Ask a working professional about the pace, physical demands, shift patterns, documentation, and less visible responsibilities of this role.

Education and verification

Post-baccalaureate or graduate-level professional education.

What to verify: Current program accreditation, prerequisite degree, clinical training, and certification eligibility.

Ask for the exact entry requirements, supervised clinical arrangements, complete costs, and intended credential outcome. Verify eligibility with the responsible organization for your program, campus, delivery format, and intended state of work. Completion, examination eligibility, certification, and state authorization are separate questions.

Bring this question to the program

Ask about current degree prerequisites, supervised screening experience, and eligibility for the intended credential.

Laboratory, Pathology, and Blood Sciences

Histotechnician or Histotechnologist

Processes, embeds, sections, and stains human tissue so pathologists can evaluate disease.

The work and its responsibilities

Work settingsPathology and tissue-processing laboratories
Patient contactPrimarily tissue and specimen work
Scientific focusTissue structure, preparation, sectioning, and staining

An illustrative work example

A tissue specimen must become a usable slide while preserving its identity. Careful processing and documentation support the pathologist’s later examination.

Actual duties depend on training, specialty, workplace, and applicable rules. Ask a working professional about the pace, physical demands, shift patterns, documentation, and less visible responsibilities of this role.

Education and verification

Associate-level technician and bachelor-level technologist pathways are common.

What to verify: NAACLS program status, laboratory experience, and certification eligibility.

Ask for the exact entry requirements, supervised clinical arrangements, complete costs, and intended credential outcome. Verify eligibility with the responsible organization for your program, campus, delivery format, and intended state of work. Completion, examination eligibility, certification, and state authorization are separate questions.

Bring this question to the program

Ask about tissue preparation experience, laboratory placements, and the exact technician or technologist credential route.

Laboratory, Pathology, and Blood Sciences

Medical Laboratory Scientist

MLS

Performs and interprets complex testing across hematology, chemistry, microbiology, immunology, transfusion medicine, and molecular diagnostics.

The work and its responsibilities

Work settingsHospital, reference, and specialty laboratories
Patient contactOften specimen-centered with limited direct patient contact
Scientific focusChemistry, hematology, microbiology, and laboratory quality

An illustrative work example

A result requires attention before it can enter the clinical record. Laboratory work includes reviewing quality information, documenting findings, and communicating through established processes.

Actual duties depend on training, specialty, workplace, and applicable rules. Ask a working professional about the pace, physical demands, shift patterns, documentation, and less visible responsibilities of this role.

Education and verification

Bachelor’s degree or qualifying post-baccalaureate pathway.

What to verify: NAACLS accreditation, clinical rotations, certification eligibility, and state personnel-licensing rules.

Ask for the exact entry requirements, supervised clinical arrangements, complete costs, and intended credential outcome. Verify eligibility with the responsible organization for your program, campus, delivery format, and intended state of work. Completion, examination eligibility, certification, and state authorization are separate questions.

Bring this question to the program

Ask about rotations across laboratory disciplines and how quality problems are taught and assessed.

Occupational reference: U.S. Bureau of Labor Statistics — Clinical laboratory professionals.

Laboratory, Pathology, and Blood Sciences

Medical Laboratory Technician

MLT

Performs routine and moderately complex laboratory testing and operates automated analyzers.

The work and its responsibilities

Work settingsClinical laboratories and diagnostic testing services
Patient contactUsually centered on specimens and laboratory systems
Scientific focusTesting methods, instrumentation, and quality control

An illustrative work example

A laboratory receives many specimens during a busy shift. Identification, analyzer operation, quality checks, and accurate records remain connected parts of the job.

Actual duties depend on training, specialty, workplace, and applicable rules. Ask a working professional about the pace, physical demands, shift patterns, documentation, and less visible responsibilities of this role.

Education and verification

Associate degree.

What to verify: NAACLS accreditation, scope by state, clinical placement, and certification eligibility.

Ask for the exact entry requirements, supervised clinical arrangements, complete costs, and intended credential outcome. Verify eligibility with the responsible organization for your program, campus, delivery format, and intended state of work. Completion, examination eligibility, certification, and state authorization are separate questions.

Bring this question to the program

Ask how much supervised experience students receive with equipment, quality checks, and specimen workflows.

Occupational reference: U.S. Bureau of Labor Statistics — Clinical laboratory professionals.

Laboratory, Pathology, and Blood Sciences

Phlebotomy Technician

Collects blood specimens safely, identifies patients correctly, protects specimen integrity, and responds to collection complications.

The work and its responsibilities

Work settingsCollection centers, clinics, hospitals, and mobile services
Patient contactFrequent direct patient encounters
Scientific focusSpecimen integrity, anatomy, identification, and safety

An illustrative work example

A patient is worried about a blood collection. Calm communication and accurate identification are part of protecting both the person and the specimen that follows.

Actual duties depend on training, specialty, workplace, and applicable rules. Ask a working professional about the pace, physical demands, shift patterns, documentation, and less visible responsibilities of this role.

Education and verification

Short-term certificate; length varies substantially.

What to verify: State licensing or training rules, required successful collections, clinical placement, and accepted certification routes.

Ask for the exact entry requirements, supervised clinical arrangements, complete costs, and intended credential outcome. Verify eligibility with the responsible organization for your program, campus, delivery format, and intended state of work. Completion, examination eligibility, certification, and state authorization are separate questions.

Bring this question to the program

Ask which supervised collections and clinical records the program provides and who verifies them.

Compare the work, then the education.

Roles within the same field can involve very different patient contact, scientific preparation, responsibilities, and working hours. Choose the specific occupation you want to explore before comparing school names or advertised program lengths.

Record your unanswered questions about clinical experience, total cost, credentials, and the state where you intend to work. Program Selection will help you turn those questions into a practical comparison and recognize education practices that deserve scrutiny.

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