KOH Prep

Test performed at York Hospital Laboratory.

Test Code

Alias/See Also
Fungal Smear

CPT Codes

Preferred Specimen
Skin, skin scrapings, hair, nail, or nail scrapings

Transport Container
Sterile Container, Leak-Proof

Transport Temperature
Room temperature

Specimen Stability
Room temperature: 24 hours
Refrigerated: Not recommended
Frozen: Not recommended

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Refrigerated specimens

KOH Prep

Setup Schedule

Report Available
Next Day

Reference Range
No fungal elements seen

Clinical Significance
KOH is used for the examination of hair, skin, and nails for the diagnosis of dermatophytes (superficial mycosis). KOH is used because it enhances the presence of fungal elements and yeast cells.

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.