Laboratory

Classifies a pathologist by subspecialty or practice category, such as anatomic, clinical, forensic, neuropathology, or cytopathology. Used in provider directories, credentialing systems, and referral routing to ensure specimens and consultations are directed to the appropriately specialized diagnostician.

The most recent date on which a pathologist's record was modified in a provider database, credentialing system, or laboratory roster. Used to track data currency, trigger re-credentialing workflows, and ensure downstream systems reflect the latest provider demographic and licensure information.

Indicates the priority level assigned to a pathologist's review of a specimen, such as routine, urgent, or STAT. Used in laboratory information systems to triage specimen processing queues, set turnaround time expectations, and ensure critical findings receive expedited diagnostic attention.

A quantitative or qualitative result recorded by a pathologist during specimen analysis, such as tumor grade, margin measurement, or biomarker expression level. Stored in LIS and structured reporting systems to populate diagnostic reports, support clinical decision-making, and feed downstream analytics.

Tracks the iteration number of a pathologist's diagnostic report or record, distinguishing preliminary findings from amended or final versions. Used in LIS and EHR systems to maintain a complete audit trail of report revisions, ensuring clinicians access the most current and authoritative diagnostic interpretation.

The postal ZIP code associated with a pathologist's practice or laboratory address. Used in provider enrollment, claims processing, and network management to verify geographic location, support service area analysis, and ensure accurate routing of correspondence and reimbursement to the correct facility.

A unique identifier for the laboratory facility that performed and reported a laboratory test, used to distinguish between results from an institution internal laboratory, a hospital reference laboratory, or a national reference laboratory such as Quest or LabCorp. Performing laboratory identifier is required for accurate result interpretation since reference ranges, methodologies, and units may differ between laboratories performing the same test.

A laboratory measurement of the number of platelets per unit volume of blood, expressed as 10^3/uL, used to assess bleeding risk and monitor conditions affecting platelet production or destruction. Platelet counts below 50,000 indicate increased bleeding risk and counts below 10,000 indicate severe thrombocytopenia with spontaneous bleeding risk. Platelet count monitoring is required for patients on chemotherapy, heparin, and certain anticoagulant therapies.

A flag identifying that a laboratory test was performed at or near the patient using a point-of-care testing device rather than being sent to the central laboratory, such as bedside glucose meters, portable blood gas analyzers, rapid streptococcal antigen tests, and CLIA-waived urinalysis strips. Point-of-care results require special handling in laboratory data systems to ensure appropriate integration with laboratory reference ranges.

A laboratory measurement of procalcitonin concentration in blood, expressed in ng/mL, used to differentiate bacterial from viral infections, assess sepsis severity, and guide antibiotic stewardship decisions by supporting antibiotic discontinuation when levels fall below 0.25 ng/mL. Procalcitonin-guided antibiotic protocols have demonstrated reductions in antibiotic duration without adverse patient outcomes in randomized controlled trials.

A laboratory measurement of prostate-specific antigen concentration in blood, expressed in ng/mL, used in prostate cancer screening, diagnosis, and post-treatment monitoring. Elevated levels above 4.0 ng/mL trigger consideration for prostate biopsy, and serial measurement every 3-6 months monitors post-prostatectomy or radiation therapy response where undetectable levels indicate treatment success.

A laboratory measurement of the time in seconds for blood plasma to clot via the extrinsic coagulation pathway, used to assess coagulation factor activity and monitor warfarin anticoagulation therapy. Prothrombin time is typically reported alongside the International Normalized Ratio for standardization across different laboratory reagents. Elevated PT indicates coagulation factor deficiency, vitamin K deficiency, liver disease, or therapeutic anticoagulation.

The upper boundary of the normal reference range for a laboratory test result, above which a result is flagged as high or abnormal. Reference range high values vary by patient age, sex, and physiological state such as pregnancy, and may differ between laboratory instruments and methodologies. Storing reference range high alongside each result enables accurate abnormal flag determination for historical results even when ranges are subsequently updated.

The lower boundary of the normal reference range for a laboratory test result, below which a result is flagged as low or abnormal. Reference range low values are age-specific, sex-specific, and may vary by specimen type and analyzer methodology. In laboratory data warehouses, reference range low values must be stored alongside each result to enable point-in-time abnormal flag calculation for historical data where reference ranges may have changed over time.

The result of a molecular multiplex panel testing for multiple respiratory pathogens simultaneously from a nasopharyngeal specimen, including influenza A and B, RSV, SARS-CoV-2, parainfluenza viruses, adenovirus, and human metapneumovirus. Respiratory pathogen panel results are used in infection control cohorting decisions, antiviral treatment initiation, and public health surveillance analytics tracking respiratory virus prevalence and seasonality.

The numeric quantity reported for a quantitative laboratory test result, stored as a decimal value distinct from the result text field that may contain qualitative or narrative results. In laboratory data warehouses, numeric result values must be stored in a DECIMAL or FLOAT column separate from the text result field to enable range queries, aggregate calculations, trend analysis, and comparison against reference ranges without requiring string-to-number conversion at query time.

A code indicating the current processing and reporting status of a laboratory result, with standard HL7 values including F (final), P (preliminary), C (correction to previously reported result), X (result cannot be obtained), and I (specimen in lab, not yet processed). Result status codes are critical for analytics to ensure preliminary results are not used in quality measure calculations requiring final verified results.

The text representation of a laboratory result, used for qualitative results such as positive/negative, reactive/non-reactive, and sensitivity/resistance for microbiology, as well as quantitative results reported with qualitative modifiers such as greater than 500 where the exact numeric boundary cannot be stored in a numeric field. Text result values require separate handling in analytics pipelines to extract numeric components and standardize qualitative vocabulary.

The standard unit in which a quantitative laboratory result is expressed, such as mg/dL for glucose, mEq/L for electrolytes, g/dL for hemoglobin, and IU/mL for viral loads. Result unit of measure is essential for result interpretation and must be stored alongside the numeric value in data warehouses since the same test may be reported in different units by different laboratories, requiring unit conversion before cross-facility analytics.

A laboratory measurement of total calcium concentration in blood serum, expressed in mg/dL, with a normal range of approximately 8.5-10.5 mg/dL. Serum calcium is a component of Basic and Comprehensive Metabolic Panels, with hypercalcemia associated with hyperparathyroidism and malignancy, and hypocalcemia associated with hypoparathyroidism and vitamin D deficiency. Total calcium must be interpreted in context of albumin level with corrected calcium calculation required in hypoalbuminemia.