Laboratory

A laboratory measurement of the rate in mm/hour at which red blood cells settle in an anticoagulated blood sample, used as a nonspecific marker of inflammation, infection, malignancy, and autoimmune disease. ESR is used alongside CRP in monitoring inflammatory diseases such as rheumatoid arthritis, temporal arteritis, and polymyalgia rheumatica where ESR can be markedly elevated above 100 mm/hour.

A calculated laboratory value estimating the rate of blood filtration by the kidneys in mL/min/1.73m2, derived from serum creatinine, patient age, and sex using formulas such as CKD-EPI or MDRD. eGFR is the standard metric for chronic kidney disease staging from G1 through G5, is used in HEDIS measures for diabetes nephropathy monitoring, and is critical for medication dosing adjustments for renally cleared drugs.

A flag indicating whether a patient was in a fasting state at the time of specimen collection, required for accurate interpretation of fasting glucose, lipid panels, and other tests with reference ranges defined for fasting specimens. HEDIS measures requiring fasting lipid panels exclude non-fasting specimens, and diabetes diagnostic criteria differentiate between fasting plasma glucose and random glucose thresholds.

A laboratory measurement of ferritin protein concentration in blood serum, expressed in ng/mL, reflecting total body iron stores as the primary intracellular iron storage protein. Low ferritin below 12-15 ng/mL is a sensitive and specific indicator of iron deficiency, while elevated ferritin is an acute phase reactant rising in inflammation, infection, malignancy, and liver disease. Ferritin is used in anemia of chronic disease differentiation and iron replacement therapy monitoring.

A laboratory measurement of gamma-glutamyl transferase enzyme activity in blood, expressed in U/L, used to confirm a hepatic source of elevated alkaline phosphatase, assess alcohol use, and detect drug-induced liver injury. GGT is highly sensitive for hepatobiliary disease and is elevated in fatty liver, medications, and alcohol use disorder. GGT elevation with normal ALP is associated with mitochondrial dysfunction and metabolic syndrome.

A laboratory measurement of the percentage of blood volume occupied by red blood cells, used alongside hemoglobin to characterize anemia severity and type. Hematocrit is included in the Complete Blood Count and is used in blood transfusion trigger protocols, preoperative risk assessment, and monitoring of chronic anemia management programs. The ratio of hemoglobin to hematocrit of approximately 1:3 is used to verify result accuracy.

A binary flag indicating whether a hematology lab order or result record is currently active within the clinical system. Distinguishes current, actionable blood study records from those that have been cancelled, superseded, or archived, ensuring accurate filtering in clinical and reporting workflows.

Describes the current operational state of a hematology lab record, such as active, inactive, pending, or completed. Used to manage the lifecycle of blood study orders and results within laboratory information systems, supporting workflow routing, result reporting, and clinical decision support processes.

Stores the physical location associated with a hematology record, typically representing the facility or department where blood specimens were collected or processed. Used for specimen logistics, result routing, and linking hematology data to specific clinical sites within multi-location health system environments.

Records a financial modification applied to charges associated with hematology laboratory services, such as contractual allowances, billing corrections, or payer-negotiated reductions. Used in revenue cycle management to reconcile expected versus actual reimbursement for blood studies on institutional claims.

The patient's age recorded at the time of a hematology encounter or blood study order. Used in clinical data systems to contextualize CBC, coagulation, or bone marrow results, support age-specific reference range validation, and stratify hematologic findings in population health analytics.

The maximum dollar amount a payer will reimburse for a hematology service such as a CBC, blood smear, or coagulation panel. Used in claims adjudication to determine payment limits after applying contractual adjustments, and to calculate patient cost-sharing responsibilities like copays and coinsurance.

The monetary value associated with a hematology service transaction, representing the gross charge, payment, or adjustment amount depending on context. Used in revenue cycle management to track financial activity for blood studies including CBC panels, coagulation tests, and bone marrow evaluations.

The current authorization state of a hematology order or procedure, indicating whether it is pending, approved, denied, or conditionally approved by a payer or clinical reviewer. Used in prior authorization workflows to determine if blood studies may proceed before services are rendered.

The identity of the clinician, supervisor, or payer representative who authorized a hematology order, result, or prior authorization request. Used in audit trails and clinical governance workflows to establish accountability for blood study approvals within laboratory and revenue cycle systems.

The recorded time at which a patient arrived for a hematology appointment or at which a blood specimen arrived at the laboratory for processing. Used in operational analytics to measure turnaround time, workflow efficiency, and compliance with specimen handling protocols.

The calendar date on which a patient presented for a hematology encounter or a blood specimen was received by the laboratory. Used in clinical and operational reporting to track scheduling adherence, specimen chain of custody, and time-to-result metrics for hematologic testing.

The clinician's documented clinical evaluation and interpretive findings from a hematology encounter, including interpretation of blood count abnormalities, morphology findings, or coagulation results. Used in clinical notes to communicate diagnostic impressions and guide treatment decisions for hematologic conditions.

The remaining unpaid dollar amount owed on a hematology service account after payments and adjustments have been applied. Used in patient billing and accounts receivable workflows to track outstanding patient or payer responsibility for blood studies and related hematology services.

The total charges submitted to a payer or patient for a hematology service such as a complete blood count, peripheral smear review, or coagulation study. Used as the starting point in claims adjudication before contractual allowances, denials, or patient cost-sharing amounts are applied.