Biomarkers · Chemical
We have not added a physiological summary for this biomarker yet. Compare the commercial laboratory assays and population reference ranges below.
Check orderable catalog codes, specimen types, fasting requirements, and demographic reference ranges across laboratories.
Laboratory assay overview
This profile serves as an aid in the diagnosis of allergic bronchopulmonary aspergillosis (ABPA).
Labcorp test directory, test code 607635
Labcorp test directory, test code 030577
Labcorp test directory, test code 042077
Reference intervals for adults have been established by the laboratory. See table. Reference Intervals for Lymphocyte Immunophenotyping CD | Age | 95% Confidence Interval Percentage | Cells/mm3 Minimum | Maximum | Minimum | Maximum Pediatric reference intervals are from Comans-Bitter WM, de Groot R, van den Beemd R, et al. Immunophenotyping of blood lymphocytes in childhood. Reference values for lymphocyte subpopulations. J Pediatrics. 1997 Mar; 130(3):388-393. CD4+ | Neonates | 17 | 52 | 400 | 3500 1 wk to 2 m | 41 | 68 | 1700 | 5300 2 to 5 m | 33 | 58 | 1500 | 5000 5 to 9 m | 33 | 58 | 1400 | 5100 9 to 15 m | 31 | 54 | 1000 | 4600 15 to 24 m | 25 | 50 | 900 | 5500 2 to 5 y | 23 | 48 | 500 | 2400 5 to 10 y | 27 | 53 | 300 | 2000 10 to 16 y | 25 | 48 | 400 | 2100 Adults | 31 | 59 | 359 | 1519 CD8+ | Neonates | 10 | 41 | 200 | 1900 1 wk to 2 m | 9 | 23 | 400 | 1700 2 to 5 m | 11 | 25 | 500 | 1600 5 to 9 m | 13 | 26 | 600 | 2200 9 to 15 m | 12 | 28 | 400 | 2100 15 to 24 m | 11 | 32 | 400 | 2300 2 to 5 y | 14 | 33 | 300 | 1600 5 to 10 y | 19 | 34 | 300 | 1800 10 to 16 y | 9 | 35 | 200 | 1200 Adults | 12 | 36 | 109 | 897 T4:T8 ratio | Adults | 0.92 | 3.72
Labcorp test directory, test code 505271
Laboratory assay overview
This profile is used for the assessment of patients with chronic fatigue (including post-COVID-19 fatigue).
Labcorp test directory, test code 165075
Laboratory assay overview
This test is used for diagnostic evaluation of patients with possible chronic urticaria.
Labcorp test directory, test code 505805
Laboratory assay overview
As a screening test to evaluate overall health; detect and/or identify a wide range of hematologic disorders; assist in managing medications/chemotherapeutic decisions
Labcorp test directory, test code 005009
Laboratory assay overview
Assessment of patients at risk of mortality from COVID-19 disease
Labcorp test directory, test code 164081
Laboratory assay overview
Comprehensive panel for the assessment of patients at risk of severe COVID-19 disease progression
Labcorp test directory, test code 164049
Laboratory assay overview
Assessment of patients at risk of progession to severe COVID-19 within 7 days from admission
Labcorp test directory, test code 164052
Laboratory assay overview
This test is used to monitor a patient's helper/inducer T-cell status.
Reference intervals for adults have been established by the laboratory. See table. CD4+ Reference Intervals for Lymphocyte Immunophenotyping Age | 95% Confidence Interval Percentage | Cells/mm³ Minimum | Maximum | Minimum | Maximum Pediatric reference intervals are from Comans-Bitter WM, de Groot R, van den Beemd R, et al. Immunophenotyping of blood lymphocytes in childhood. Reference values for lymphocyte subpopulations. J Pediatrics. 1997 Mar; 130(3):388-393. Neonates | 17 | 52 | 400 | 3500 1 wk to 2 m | 41 | 68 | 1700 | 5300 2 to 5 m | 33 | 58 | 1500 | 5000 5 to 9 m | 33 | 58 | 1400 | 5100 9 to 15 m | 31 | 54 | 1000 | 4600 15 to 24 m | 25 | 50 | 900 | 5500 2 to 5 y | 23 | 48 | 500 | 2400 5 to 10 y | 27 | 53 | 300 | 2000 10 to 16 y | 25 | 48 | 400 | 2100 Adults | 31 | 59 | 359 | 1519
Labcorp test directory, test code 505008
Laboratory assay overview
This test is used to monitor patients' helper/suppressor T-cell status and assess other changes in T-cell surface markers that may indicate changes in immune status.
Reference intervals for adults have been established by the laboratory. See table. Reference Intervals for Lymphocyte Immunophenotyping CD | Age | 95% Confidence Interval Percentage | Cells/mm3 Minimum | Maximum | Minimum | Maximum Pediatric reference intervals are from Comans-Bitter WM, de Groot R, van den Beemd R, et al. Immunophenotyping of blood lymphocytes in childhood. Reference values for lymphocyte subpopulations. J Pediatrics. 1997 Mar; 130(3):388-393. CD3+ | Neonates | 28 | 76 | 600 | 5000 1 wk to 2 m | 60 | 85 | 2300 | 7000 2 to 5 m | 48 | 75 | 2300 | 6500 5 to 9 m | 50 | 77 | 2400 | 6900 9 to 15 m | 54 | 76 | 1600 | 6700 15 to 24 m | 39 | 73 | 1400 | 8000 2 to 5 y | 43 | 76 | 900 | 4500 5 to 10 y | 55 | 78 | 700 | 4200 10 to 16 y | 52 | 78 | 800 | 3500 Adults | 58 | 86 | 622 | 2402 CD3+CD4+ | Neonates | 17 | 52 | 400 | 3500 1 wk to 2 m | 41 | 68 | 1700 | 5300 2 to 5 m | 33 | 58 | 1500 | 5000 5 to 9 m | 33 | 58 | 1400 | 5100 9 to 15 m | 31 | 54 | 1000 | 4600 15 to 24 m | 25 | 50 | 900 | 5500 2 to 5 y | 23 | 48 | 500 | 2400 5 to 10 y | 27 | 53 | 300 | 2000 10 to 16 y | 25 | 48 | 400 | 2100 Adults | 31 | 59 | 359 | 1519 CD3+CD8+ | Neonates | 10 | 41 | 200 | 1900 1 wk to 2 m | 9 | 23 | 400 | 1700 2 to 5 m | 11 | 25 | 500 | 1600 5 to 9 m | 13 | 26 | 600 | 2200 9 to 15 m | 12 | 28 | 400 | 2100 15 to 24 m | 11 | 32 | 400 | 2300 2 to 5 y | 14 | 33 | 300 | 1600 5 to 10 y | 19 | 34 | 300 | 1800 10 to 16 y | 9 | 35 | 200 | 1200 Adults | 12 | 36 | 109 | 897 T4:T8 ratio | Adults | 0.92 | 3.72 CD3-CD56+ | Neonates | 6 | 58 | 100 | 1900 1 wk to 2 m | 3 | 23 | 200 | 1400 2 to 5 m | 2 | 14 | 100 | 1300 5 to 9 m | 2 | 13 | 100 | 1000 9 to 15 m | 3 | 17 | 200 | 1200 15 to 24 m | 3 | 16 | 100 | 1400 2 to 5 y | 4 | 23 | 100 | 1000 5 to 10 y | 4 | 26 | 90 | 900 10 to 16 y | 6 | 27 | 70 | 1200 Adults | 1 | 19 | 24 | 406
Labcorp test directory, test code 259317
See individual tests.
Labcorp test directory, test code 150201
Laboratory assay overview
A recent American Congress of Obstetricians and Gynecologists (ACOG) practice bulletin made recommendations as to the appropriate use of laboratory tests that should be performed as part of the investigation of the cause of late term (greater than 20 weeks) fetal demise.6 The authors suggested that maternal testing for thyroid stimulating hormone (TSH), human parvovirus B19 IgG and IgM, lupus anticoagulants, and anticardiolipin antibodies could provide useful information for future pregnancy management.
Labcorp test directory, test code 365200
Laboratory assay overview
This test is used to determine iron deficiency anemia.
Labcorp test directory, test code 004800
Laboratory assay overview
This test is used for screening of patients suspected to be at risk for liver fibrosis. AST to Platelet Ratio Index (APRI) is reported to be a simple, noninvasive and readily available laboratory test index that can stratify patients with HCV and metabolic dysfunction-associated steatohepatitis (MASH) who are at high or low risk for significant fibrosis and cirrhosis with high degree of accuracy. FIB-4 index is reported to be a simple, accurate, noninvasive and readily available laboratory test index that can help in the evaluation of patients with HCV and metabolic dysfunction-associated steatotic liver disease (MASLD) for the presence of liver fibrosis indication for liver biopsy and other liver-related complications.
Labcorp test directory, test code 402145
Laboratory assay overview
This profile is used for basic diagnostic laboratory testing for evaluation of post-COVID conditions.
Labcorp test directory, test code 165065
Labcorp test directory, test code 505321
Laboratory assay overview
This test is used to assess changes in T-lymphocyte surface markers that may indicate immune stimulation.
Reference intervals for adults have been established by the laboratory. See table. Adult Reference Intervals for Lymphocyte Immunophenotyping CD | 95% Confidence Interval Percentage | Cells/mm3 Minimum | Maximum | Minimum | Maximum CD3+ | 58 | 86 | 622 | 2402 CD3+CD25+ | 5 | 26 | 79 | 535 CD3-CD56+ | 1 | 19 | 24 | 406
Labcorp test directory, test code 502500
Laboratory assay overview
This test is used to determine levels of natural killer cells in circulation and monitor immune stimulation therapy.
Reference intervals for adults have been established by the laboratory. See table. CD3_CD56+ Reference Intervals for Lymphocyte Immunophenotyping Age | 95% Confidence Interval Percentage | Cells/mm3 Minimum | Maximum | Minimum | Maximum Pediatric reference intervals are from Comans-Bitter WM, de Groot R, van den Beemd R, et al. Immunophenotyping of blood lymphocytes in childhood. Reference values for lymphocyte subpopulations. J Pediatrics. 1997 Mar; 130(3):388-393. Neonates | 6 | 58 | 100 | 1900 1 wk to 2 m | 3 | 23 | 200 | 1400 2 to 5 m | 2 | 14 | 100 | 1300 5 to 9 m | 2 | 13 | 100 | 1000 9 to 15 m | 3 | 17 | 200 | 1200 15 to 24 m | 3 | 16 | 100 | 1400 2 to 5 y | 4 | 23 | 100 | 1000 5 to 10 y | 4 | 26 | 90 | 900 10 to 16 y | 6 | 27 | 70 | 1200 Adults | 1 | 19 | 24 | 406
Labcorp test directory, test code 505016
Laboratory assay overview
NLR (Neutrophil to Lymphocyte Ratio) is a biomarker that can be used as an indication of subclinical inflammation. NLR is a calculation based on the Absolute Neutrophil Count divided by the Absolute Lymphocyte Count determined by the peripheral blood CBC differential. This calculation, according to recent literature, is useful in assessing the likelihood of severe progression of disease in SARS-CoV-2 positive patients. CBC:A screening test to evaluate overall health; detect and or identify a wide range of hematologic disorders; assist in managing medications/chemotherapeutic decisions.
Labcorp test directory, test code 005013
Laboratory assay overview
Obesity, associated with a multitude of co-morbid conditions, is a serious health condition impacting a significant number of patients in the U.S. Per the Centers for Disease Control and Prevention (CDC), the prevalence of obesity in the U.S. increased from 30.5% in 1999-2000 to 41.9% in 2017- March 2020.1 Currently, there is great emphasis on being overweight and obesity as a disease, with societies providing guidance on the use of newly available pharmacologic therapies as well as bariatric surgical procedures to decrease the burden. Depending upon the type of bariatric surgery performed, deficiencies of micronutrients and some vitamins may ensue, and recommendations are to evaluate these parameters prior to surgery and at least annually thereafter.
Labcorp test directory, test code 259129
Laboratory assay overview
This test is used to aid in management and monitoring of patients suspected or diagnosed with preeclampsia.
Labcorp test directory, test code 360640
Laboratory assay overview
Initial screening profile intended for the first prenatal visit to evaluate health status in early pregnancy. This profile aligns with current clinical guidelines and recommendations (see references).
Labcorp test directory, test code 144053
Laboratory assay overview
This initial screening profile is intended for the first prenatal visit to evaluate health status in early pregnancy. This profile aligns with current clinical guidelines and recommendations and includes the HBV triple panel (see references).
Labcorp test directory, test code 144059
Laboratory assay overview
This initial screening profile is intended for the first prenatal visit to evaluate health status in early pregnancy. This profile aligns with current clinical guidelines and recommendations and includes the HBV triple panel, VZV IgG, and QuantiFERON-TB Gold Plus.
Labcorp test directory, test code 144099
Reference intervals for adults have been established by the laboratory. See table. Reference Intervals for Lymphocyte Immunophenotyping CD | Age | 95% Confidence Interval Percentage | Cells/mm³ Minimum | Maximum | Minimum | Maximum Pediatric reference intervals are from Comans-Bitter WM, de Groot R, van den Beemd R, et al. Immunophenotyping of blood lymphocytes in childhood. Reference values for lymphocyte subpopulations. J Pediatrics. 1997 Mar; 130(3):388-393. CD3 | Neonates | 28 | 76 | 600 | 5000 1 wk to 2 m | 60 | 85 | 2300 | 7000 2 to 5 m | 48 | 75 | 2300 | 6500 5 to 9 m | 50 | 77 | 2400 | 6900 9 to 15 m | 54 | 76 | 1600 | 6700 15 to 24 m | 39 | 73 | 1400 | 8000 2 to 5 y | 43 | 76 | 900 | 4500 5 to 10 y | 55 | 78 | 700 | 4200 10 to 16 y | 52 | 78 | 800 | 3500 Adults | 58 | 86 | 622 | 2402 CD3+CD4+ | Neonates | 17 | 52 | 400 | 3500 1 wk to 2 m | 41 | 68 | 1700 | 5300 2 to 5 m | 33 | 58 | 1500 | 5000 5 to 9 m | 33 | 58 | 1400 | 5100 9 to 15 m | 31 | 54 | 1000 | 4600 15 to 24 m | 25 | 50 | 900 | 5500 2 to 5 y | 23 | 48 | 500 | 2400 5 to 10 y | 27 | 53 | 300 | 2000 10 to 16 y | 25 | 48 | 400 | 2100 Adults | 31 | 59 | 359 | 1519 CD3+CD8+ | Neonates | 10 | 41 | 200 | 1900 1 wk to 2 m | 9 | 23 | 400 | 1700 2 to 5 m | 11 | 25 | 500 | 1600 5 to 9 m | 13 | 26 | 600 | 2200 9 to 15 m | 12 | 28 | 400 | 2100 15 to 24 m | 11 | 32 | 400 | 2300 2 to 5 y | 14 | 33 | 300 | 1600 5 to 10 y | 19 | 34 | 300 | 1800 10 to 16 y | 9 | 35 | 200 | 1200 Adults | 12 | 36 | 109 | 897 T4:T8 ratio | Adults | 0.92 | 3.72 CD19+ | Neonates | 5 | 22 | 40 | 1100 1 wk to 2 m | 4 | 26 | 600 | 1900 2 to 5 m | 14 | 39 | 600 | 3000 5 to 9 m | 13 | 35 | 700 | 2500 9 to 15 m | 15 | 39 | 600 | 2700 15 to 24 m | 17 | 41 | 600 | 3100 2 to 5 y | 14 | 44 | 200 | 2100 5 to 10 y | 10 | 31 | 200 | 1600 10 to 16 y | 8 | 24 | 200 | 600 Adults | 3 | 25 | 12 | 645 CD3-CD56+ | Neonates | 6 | 58 | 100 | 1900 1 wk to 2 m | 3 | 23 | 200 | 1400 2 to 5 m | 2 | 14 | 100 | 1300 5 to 9 m | 2 | 13 | 100 | 1000 9 to 15 m | 3 | 17 | 200 | 1200 15 to 24 m | 3 | 16 | 100 | 1400 2 to 5 y | 4 | 23 | 100 | 1000 5 to 10 y | 4 | 26 | 90 | 900 10 to 16 y | 6 | 27 | 70 | 1200 Adults | 1 | 19 | 24 | 406
Labcorp test directory, test code 505370
Laboratory assay overview
This test is used for enumeration of lymphocyte subsets for classification and diagnosis of primary immunodeficiency diseases and for evaluating and monitoring AIDS patients.
Reference intervals for adults have been established by the laboratory. See table. Reference Intervals for Lymphocyte Immunophenotyping CD | Age | 95% Confidence Interval Percentage | Cells/mm³ Minimum | Maximum | Minimum | Maximum Pediatric reference intervals are from Comans-Bitter WM, de Groot R, van den Beemd R, et al. Immunophenotyping of blood lymphocytes in childhood. Reference values for lymphocyte subpopulations. J Pediatrics. 1997 Mar; 130(3):388-393. CD3+ | Neonates | 28 | 76 | 600 | 5000 1 wk to 2 m | 60 | 85 | 2300 | 7000 2 to 5 m | 48 | 75 | 2300 | 6500 5 to 9 m | 50 | 77 | 2400 | 6900 9 to 15 m | 54 | 76 | 1600 | 6700 15 to 24 m | 39 | 73 | 1400 | 8000 2 to 5 y | 43 | 76 | 900 | 4500 5 to 10 y | 55 | 78 | 700 | 4200 10 to 16 y | 52 | 78 | 800 | 3500 Adults | 58 | 86 | 622 | 2402 CD3+CD4+ | Neonates | 17 | 52 | 400 | 3500 1 wk to 2 m | 41 | 68 | 1700 | 5300 2 to 5 m | 33 | 58 | 1500 | 5000 5 to 9 m | 33 | 58 | 1400 | 5100 9 to 15 m | 31 | 54 | 1000 | 4600 15 to 24 m | 25 | 50 | 900 | 5500 2 to 5 y | 23 | 48 | 500 | 2400 5 to 10 y | 27 | 53 | 300 | 2000 10 to 16 y | 25 | 48 | 400 | 2100 Adults | 31 | 59 | 359 | 1519 CD3+CD8+ | Neonates | 10 | 41 | 200 | 1900 1 wk to 2 m | 9 | 23 | 400 | 1700 2 to 5 m | 11 | 25 | 500 | 1600 5 to 9 m | 13 | 26 | 600 | 2200 9 to 15 m | 12 | 28 | 400 | 2100 15 to 24 m | 11 | 32 | 400 | 2300 2 to 5 y | 14 | 33 | 300 | 1600 5 to 10 y | 19 | 34 | 300 | 1800 10 to 16 y | 9 | 35 | 200 | 1200 Adults | 12 | 36 | 109 | 897 T4:T8 ratio | Adults | 0.92 | 3.72 CD19+ | Neonates | 5 | 22 | 40 | 1100 1 wk to 2 m | 4 | 26 | 600 | 1900 2 to 5 m | 14 | 39 | 600 | 3000 5 to 9 m | 13 | 35 | 700 | 2500 9 to 15 m | 15 | 39 | 600 | 2700 15 to 24 m | 17 | 41 | 600 | 3100 2 to 5 y | 14 | 44 | 200 | 2100 5 to 10 y | 10 | 31 | 200 | 1600 10 to 16 y | 8 | 24 | 200 | 600 Adults | 3 | 25 | 12 | 640
Labcorp test directory, test code 096917
Laboratory assay overview
This test is an expanded profile for AIDS monitoring and prognosis. An increase in activation markers is associated with poor prognosis.
Reference intervals are established by the laboratory. See table. Adult Reference Intervals for Lymphocyte Immunophenotyping CD | 95% Confidence Interval Percentage | Cells/mm3 Minimum | Maximum | Minimum | Maximum CD3+ | 57.5 | 86.2 | 622 | 2402 CD3+CD4+ | 30.8 | 58.5 | 359 | 1519 CD3+CD8+ | 12.0 | 35.5 | 109 | 897 CD3+CD25+ | 4.9 | 25.9 | 79 | 535 T4:T8 ratio | 0.92 | 3.72 CD8+CD38+ | 0 | 17.7 | 0 | 381 CD8+HLA-DR+ | 0 | 4.9 | 0 | 117
Labcorp test directory, test code 505750
Labcorp test directory, test code 505065
Reference intervals for adults have been established by the laboratory. See table. Reference Intervals for Lymphocyte Immunophenotyping CD | Age | 95% Confidence Interval Percentage | Cells/mm³ Minimum | Maximum | Minimum | Maximum Pediatric reference intervals are from Comans-Bitter WM, de Groot R, van den Beemd R, et al. Immunophenotyping of blood lymphocytes in childhood. Reference values for lymphocyte subpopulations. J Pediatrics. 1997 Mar; 130(3):388-393. CD3+ | Neonates | 28 | 76 | 600 | 5000 1 wk to 2 m | 60 | 85 | 2300 | 7000 2 to 5 m | 48 | 75 | 2300 | 6500 5 to 9 m | 50 | 77 | 2400 | 6900 9 to 15 m | 54 | 76 | 1600 | 6700 15 to 24 m | 39 | 73 | 1400 | 8000 2 to 5 y | 43 | 76 | 900 | 4500 5 to 10 y | 55 | 78 | 700 | 4200 10 to 16 y | 52 | 78 | 800 | 3500 Adults | 58 | 86 | 622 | 2402 CD3+CD4+ | Neonates | 17 | 52 | 400 | 3500 1 wk to 2 m | 41 | 68 | 1700 | 5300 2 to 5 m | 33 | 58 | 1500 | 5000 5 to 9 m | 33 | 58 | 1400 | 5100 9 to 15 m | 31 | 54 | 1000 | 4600 15 to 24 m | 25 | 50 | 900 | 5500 2 to 5 y | 23 | 48 | 500 | 2400 5 to 10 y | 27 | 53 | 300 | 2000 10 to 16 y | 25 | 48 | 400 | 2100 Adults | 31 | 59 | 359 | 1519 CD3+CD8+ | Neonates | 10 | 41 | 200 | 1900 1 wk to 2 m | 9 | 23 | 400 | 1700 2 to 5 m | 11 | 25 | 500 | 1600 5 to 9 m | 13 | 26 | 600 | 2200 9 to 15 m | 12 | 28 | 400 | 2100 15 to 24 m | 11 | 32 | 400 | 2300 2 to 5 y | 14 | 33 | 300 | 1600 5 to 10 y | 19 | 34 | 300 | 1800 10 to 16 y | 9 | 35 | 200 | 1200 Adults | 12 | 36 | 109 | 897 T4:T8 ratio | Adults | 0.92 | 3.72
Labcorp test directory, test code 096925
We compile every detail above directly from named laboratory directories and published clinical studies. Laboratories calculate standard reference intervals from the statistical distribution of tested populations for a specific assay method and demographic group, rather than setting universal optimal targets.
Always review your personal lab results with a licensed clinician, or track your lab history and health goals in Aumnivida.
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