{"id":"urine-hyaline-casts","name":"Urine Hyaline Casts","shortName":"Hyaline casts","aliases":["Hyaline Casts","Hyaline Cast","Casts, Hyaline","HYALINE CAST (UA)","Hyaline Cast/LPF","Hyaline Cast (Urine)","HYALINE CAST","Hyaline Casts, Urine","Hyaline Casts/LPF","Hyaline Casts (UA)"],"abbreviations":[],"loinc":[{"code":"5796-8","primary":true},{"code":"88966-7","primary":false},{"code":"33223-9","primary":false},{"code":"25162-9","primary":false}],"specimen":"urine","units":[{"ucum":"/[LPF]","display":"/LPF"}],"referenceRanges":[{"population":"Adults","low":null,"high":0,"unit":"/[LPF]","unitDisplay":"/LPF","note":"Quest prints 'None seen' for hyaline casts, and Labcorp prints 'None seen' per LPF for casts overall and names the cast type on a separate line. Three hospital tables in open-access case reports allow up to 0-2 per LPF, and MedlinePlus says a few hyaline casts are normal. So a rare hyaline cast is common and often harmless even though Quest and Labcorp list none as the expected result. Your report's own range comes first.","sources":[{"title":"Urinalysis, Complete (test code 5463)","url":"https://testdirectory.questdiagnostics.com/test/test-detail/5463/urinalysis-complete?cc=MASTER","publisher":"Quest Diagnostics"},{"title":"Urinalysis, Complete (test 003772), sample patient report","url":"https://files.labcorp.com/testmenu-d8/sample_reports/003772.pdf","publisher":"Labcorp","year":2026}]}],"review":{"status":"ai-verified","label":"AI-verified against cited sources. Awaiting expert review","lastReviewed":"2026-10-03"},"summary":"A count of hyaline casts, tiny protein tubes in urine that are often harmless, especially after exercise or when you are dehydrated.","url":"https://bloodtesttracker.com/markers/urine-hyaline-casts","notice":"Information, not medical advice. Ranges differ between labs, so the range on your own report is the one your result is judged against."}