Cardiology

Test Code: 13808 to be added to 6399

Test Code: 4451

CPT Code(s): 82550, 82552

Test code: 763

CPT code(s): 85790

Methodology: Photo-Optical Clot Detection

Clinical Significance: The aPTT is a screening test that will detect deficiencies or inhibitors to the intrinsic (Factors VIII, IX, XI and XII) and common (Factors II, V, X and fibrinogen) pathway coagulation factors.

Test Code: 593

CPT Code(s): 83615

Methodology: Spectrophotometry (SP)

Clinical Significance: Elevations in serum lactate dehydrogenase occur from myocardial infarction, liver disease, pernicious and megaloblastic anemia, pulmonary emboli, malignancies, and muscular dystrophy. Since lactic dehydrogenase is present in many body tissues, it's diagnosis usefulness is limited. Tissue specificity may be enhanced by isoenzyme analysis.

Wall Charts can be ordered by emailing DLOClientSupply@questdiagnostics.com or you can download/print the chart by clicking on the disc or printer icon above the chart below:

LIPID PANEL WITH RELFEX TO DIRECT HDL
Test Code: 14852
CPT Code(s): 80061
Includes: Total Cholesterol, HDL Cholesterol, Triglycerides, LDL-Cholesterol (calculated), Cholesterol/HDL Ratio (calculated). If Triglyceride result is >400 mg/dL, Direct LDL will be performed at an additional charge (CPT code(s): 83721).

Methodology: Spectrophotometry (SP)

Alternative Name(s): Cholesterol, HDL, Fasting Lipids, LDL

Test Code: 6399

Wall Charts can be ordered by emailing DLOClientSupply@questdiagnostics.com or you can download/print the chart by clicking on the disc or printer icon above the chart below:

Test Code: 59221

CPT Code(s): 82550, 82553

Methodology: N-acetyl-L-cysteine (NAC) and Immunoassay followed by ratio determination

Includes: Creatine Kinase total, CK-MB, CK-MB Index

Test Name: Troponin I, High Sensitivity; former test name Troponin I *updated 03.02.2026

Alternative Name(s): Troponin HS, High Sensitivity, hsTnl

Test Code: 34693; former test code 59039 *updated 03.02.2026

CPT Code(s): 84484

Methodology: Chemiluminescent Microparticle Immunoassay (CMIA)