Onychomycosis ICD-10-CM Codes | 2023

What ICD-10 Codes Are Used for Onychomycosis?

Onychomycosis, or fungal nail infection, has several associated ICD-10 codes. Here are the common onychomycosis ICD codes:

• B35.1 - Tinea Unguium: This fungal infection affects one or more nails, commonly known as onychomycosis.
• L60.1 - Onycholysis: Although not specifically onychomycosis, this condition involves the separation of the nail from the nail bed, often a complication of fungal infections.
• L60.3 - Nail Dystrophy: This disorder leads to abnormal nail formation, often due to persistent fungal infections.
• L60.4 - Beau's Lines: Horizontal depressions in the nails can be due to onychomycosis.‍
• L60.5 - Yellow nail syndrome: This condition involves nail thickening and yellow to yellow-green discoloration and can sometimes involve fungal infection.

Which Onychomycosis ICD Codes Are Billable?

Before we delve into the specific codes, it's worth noting that a billable code is detailed enough to specify a medical diagnosis.

• B35.1 - Yes, this is billable and is used to specify a diagnosis for Tinea Unguium or Onychomycosis.
• L60.1 - Yes, this billable code represents Onycholysis which may be a complication of onychomycosis.
• L60.3 - Yes, Nail Dystrophy is billable, often coded when onychomycosis causes abnormal nail formation.
• L60.4 - Yes, Beau's Lines are billable, even when caused by a persistent case of onychomycosis.
• L60.5 - Yes, Yellow Nail Syndrome is billable and sometimes involves a fungal infection.

Clinical Information

Onychomycosis is a common fungal infection of the nails that usually makes the nail thickened, discolored, and brittle. It can be a source of significant discomfort and distress because it may interfere with daily activities. Detailed insights about Onychomycosis include:

• Dermatophytes primarily cause it, but yeasts and molds can also be culprits.
• The infection can spread from a fungal skin infection, such as an athlete's foot.
• Older adults, individuals with diabetes, and those with a weakened immune system are at higher risk.
• Treatment typically includes antifungal medications, but some cases may require nail removal.
• Prevention strategies include good foot hygiene, keeping the feet dry, and avoiding sharing nail clippers or shoes.

Synonyms Include:

• Tinea Unguium
• Fungal Nail Infection
• Nail Fungus
• Dermatophytic Onychomycosis
• Dystrophic Nails