{"id":"lymphocytes-absolute","name":"Lymphocytes (Absolute)","shortName":"Lymphocytes (abs)","aliases":["ALC","Absolute Lymphocytes","Lymphs (Absolute)","Lymph#","Absolute Lymphocyte Count","Lymphocytes #","Lymphocytes Abs","Lymphocyte count","Linfocitos absolutos","Lymphocytes, Absolute","Absolute Lymphs","Lymphocyte Absolute","Lymphocytes (Abs)","LYM#","Total Lymphocyte Count","Lymphozyten absolut"],"abbreviations":["ALC","Lymph#","LYM#"],"loinc":[{"code":"731-0","primary":true},{"code":"26474-7","primary":false},{"code":"732-8","primary":false}],"specimen":"whole-blood","units":[{"ucum":"10*3/uL","display":"x10³/µL"},{"ucum":"10*9/L","display":"x10⁹/L"},{"ucum":"/uL","display":"cells/µL"}],"referenceRanges":[{"population":"13+","low":0.7,"high":3.1,"unit":"10*3/uL","unitDisplay":"x10³/µL","note":"Labcorp's interval for people older than 12 (the primary one here). Other labs differ: Mayo Clinic Laboratories 0.95-3.07 x10⁹/L, ARUP 1.3-3.6 x10³/µL (age 18 and older) and Health NZ Waikato 1.0-4.0 x10⁹/L (age 16 and older). x10³/µL and x10⁹/L are numerically identical. Labcorp's lower limit is below the 1.0 cutoff (1,000/µL) that hematology textbooks use to define lymphopenia.","sources":[{"title":"Pediatric Testing Reference Ranges (CBC With Differential/Platelet, test 005009)","url":"https://www.labcorp.com/content/dam/labcorp/drupal/178250_DX_TL_PediatricTestRef_Final.pdf","publisher":"Labcorp","year":2022},{"title":"Labcorp sample patient report with CBC components (Sample Report 505271)","url":"https://www.labcorp.com/assets/1724","publisher":"Labcorp","year":2025},{"title":"CBC - Overview: Complete Blood Cell Count (CBC) with Differential, Blood","url":"https://www.mayocliniclabs.com/test-catalog/Overview/9109","publisher":"Mayo Clinic Laboratories"},{"title":"CBC with Platelet Count and Automated Differential (test 0040003), Hotline effective March 1, 2021","url":"https://ltd.aruplab.com/api/ltd/hotline/0040003/44232","publisher":"ARUP Laboratories","year":2021},{"title":"CBC reference intervals (procedure HEM-2597.01, effective 14 November 2024)","url":"https://lab.waikatodhb.health.nz/assets/test-attachments/230/CBC-reference-intervals.pdf","publisher":"Te Whatu Ora Health New Zealand, Waikato","year":2024},{"title":"Lymphocytosis, Lymphocytopenia, Hypergammaglobulinemia, and Hypogammaglobulinemia (Mims et al., in Hematology)","url":"https://pmc.ncbi.nlm.nih.gov/articles/PMC7152059/","publisher":"Elsevier (via PubMed Central)"}]}],"review":{"status":"ai-verified","label":"AI-verified against cited sources. Awaiting expert review","lastReviewed":"2026-10-03"},"summary":"The actual number of lymphocytes, immune cells that help fight viruses and remember germs, in a given amount of blood.","url":"https://bloodtesttracker.com/markers/lymphocytes-absolute","notice":"Information, not medical advice. Ranges differ between labs, so the range on your own report is the one your result is judged against."}