Clinical Lab Software Glossary

A working reference for the acronyms and terms that show up constantly in clinical lab operations, compliance, and lab software conversations — kept short, plain-English, and linked to a deeper explainer where one exists.

Accreditation & regulation

CLIA (Clinical Laboratory Improvement Amendments) — U.S. federal law requiring any lab testing human specimens for diagnosis, prevention, or treatment to hold certification, scaled by test complexity. Mandatory; not optional. See CLIA vs. CAP accreditation.

CAP (College of American Pathologists) — A CMS-deemed accrediting organization. CAP accreditation is one recognized path to demonstrating CLIA compliance, known for detailed, discipline-specific inspection checklists. See CAP inspection checklist.

CMS (Centers for Medicare & Medicaid Services) — The federal agency that administers CLIA and recognizes ("deems") accrediting organizations like CAP as equivalent to direct government inspection.

PT (Proficiency Testing) — Periodic testing of unknown samples sent by an external agency to verify a lab's results match expected values. Required for regulated analytes; unsuccessful PT events require a documented investigation.

LDT (Laboratory-Developed Test) — A test designed, validated, and performed entirely within a single lab, as opposed to an FDA-cleared or -approved commercial test kit. LDTs typically require a full internal validation packet before clinical use.

Operations & systems

LIS (Laboratory Information System) — Software built around the patient/accession as the center of the record — orders, specimens, results, billing, and release, all tied to a clinical encounter. The standard system-of-record category for clinical and anatomic pathology labs. See LIS vs. LIMS.

LIMS (Laboratory Information Management System) — Software built around the sample or batch as the center of the record, common in research, industrial, and environmental testing where there's no patient or billing component. See LIS vs. LIMS.

Accessioning — The process of receiving, logging, and preparing a specimen for testing — assigning it a unique identifier, verifying labeling and integrity, and linking it to the correct order and patient record.

TAT (Turnaround Time) — The elapsed time from specimen receipt (or order placement) to result release. A core operational metric, often tracked separately for "received to resulted" versus "collected to resulted."

Reportable range — The span of values across which a quantitative test's results are considered accurate and can be reported without dilution or other manipulation.

Quality & compliance processes

QC (Quality Control) — Routine testing of known-value control materials to confirm an instrument or method is performing correctly before patient results are released.

CAPA (Corrective and Preventive Action) — The structured process for responding to a quality failure: identifying root cause, correcting the immediate issue, addressing the systemic cause, and — critically — verifying the fix actually worked. See CAPA process, step by step.

Competency assessment — Documented evaluation confirming a specific employee is qualified to perform a specific test on a specific instrument, using defined methods (direct observation, QC/PT review, blind samples, and others), typically repeated annually.

Method correlation study — A structured comparison confirming a new instrument, reagent, or method produces results that agree closely enough with an existing method to avoid clinically meaningful shifts in patient results. See method correlation studies, a practical how-to.

AMR (Antimicrobial Resistance) — In a lab compliance context, also refers to the reporting requirements around resistant-organism results, which often carry additional public health reporting obligations beyond standard result release.

Assay validation terms

Analytical sensitivity (LoD) — The lowest concentration or quantity of an analyte a test can reliably detect, typically defined as detection in a high percentage (often ≥95%) of replicates at that level.

Analytical specificity — A test's ability to correctly identify only the intended target, without cross-reacting with related substances or organisms, and without interference from common specimen conditions (hemolysis, lipemia, etc.).

Precision — How consistently a test produces the same result on the same sample, measured both within a single run (repeatability) and across different days, operators, or instruments (reproducibility). See PCR assay validation protocol template.

How to use this glossary

Each term above links to a deeper, practical explainer where one exists — checklists, templates, and step-by-step processes rather than textbook definitions. Bookmark this page as the fast reference, and follow the links when you need the working version.