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KOH (Potassium Hydroxide) Preparation
MessageCultures are more sensitive than smears; therefore, the KOH preparation may be negative when culture is positive. The addition of KOH is to hydrolyze proteinaceous debris, cells, etc. To determine the presence of fungi in mucoid specimens, a Gram stain is recommended.
Test Code
747
CPT Codes
87220
Preferred Specimen
Submit only 1 of the following specimens:
Hair
Container/Tube: Sterile container(s)-Dry slide is not acceptable.
Specimen Volume: Hair
Note: Indicate specimen source.
Nail
Container/Tube: Sterile container(s)-Dry slide is not acceptable.
Specimen Volume: Nail
Note: Indicate specimen source.
Skin Scrapings
Container/Tube: Sterile container(s)-Dry slide is not acceptable.
Specimen Volume: Skin scrapings
Note: Indicate specimen source.
Hair
Container/Tube: Sterile container(s)-Dry slide is not acceptable.
Specimen Volume: Hair
Note: Indicate specimen source.
Nail
Container/Tube: Sterile container(s)-Dry slide is not acceptable.
Specimen Volume: Nail
Note: Indicate specimen source.
Skin Scrapings
Container/Tube: Sterile container(s)-Dry slide is not acceptable.
Specimen Volume: Skin scrapings
Note: Indicate specimen source.
Transport Temperature
Ambient
Setup Schedule
Monday through Friday
Reference Range
No yeasts or hyphal elements seen
Clinical Significance
Useful for determination of presence of fungi in hair, nail, or skin scrapings
Performed By
CoxHealth
