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HelpTest Code M36 KOH Preparation
Additional Codes
ALAB: KOH
PowerChart: KOH Prep
MA Cerner: KOH.
Test Method
Wet Prep with Addition of Potassium Hydroxide (KOH)
Specimen Requirement
Skin scrapings are required.
Additional Specimen Collection Information
Collect specimen using a sterile scraper [tongue depressor, scalpel or tweezers]. Sponge the infected area with 70% alcohol and allow to dry. Scrape the active [leading] edge of the lesion or top of the vesicle, with the sterile scraper, into a sterile container. Label the specimen appropriately [including source, date and time of collection]. Transport the specimen to the laboratory immediately after collection.
Performance
Performed Monday through Sunday, allow 24 hours turn-around time after the specimen is received in Microbiology.
Reference Values
Negative for Fungal Elements
(Presence or absence of fungal elements is reported.)
CPT Code Information
87220 Identification of Organism from Primary Source and Sensitivity Studies; Tissue examination by KOH slide of samples from skin, hair, or nails for fungi or ectoparasite ova or mites (eg, scabies)
Useful For
Detection of fungi elements in skin scrapings.
LOINC Code Information
55303-2 Fungus [Presence] In Skin By KOH Preparation