Onychomycosis is a fungal nail infection. It affects the toenails or fingernails. The nails may turn dark, grow thicker, and start to crack.
In medical billing and diagnosis, the correct ICD-10 code is essential. Doctors use special codes to record these infections. It helps in medical records and billing.
In this guide, we’ll help you understand the icd 10 for onychomycosis, what it means, and how to use it accurately
Why is ICD-10 for onychomycosis Coding Important?

Accurate coding helps:
- Get faster insurance approvals
- Prevent claim denials
- Support better treatment tracking
Common ICD-10 Codes Related to onychomycosis icd 10
Diagnosis term | ICD-10 Code | Description |
onychomycosis icd 10 | B35.1 | Fungal infection of nail |
b35.1 | B35.1 | Official code for nail fungus |
dx code for onychomycosis | B35.1 | Diagnostic code for the condition |
nail fungus icd 10 | B35.1 | General description |
nail fungus toenails icd 10 | B35.1 | Specific to toenails |
What Causes onychomycosis?

- Poor foot hygiene
- Walking barefoot in wet public areas
- Wearing tight shoes
- Having athlete’s foot
Symptoms of Nail Fungus

Look out for these signs:
- Yellow or white spots under the nail
- Thickened or brittle nails
- Nails that crumble or split
- Bad odor
How is onychomycosis diagnosed?
Doctors usually examine the nails and may take a small sample. This sample is tested in a lab to confirm fungal infection. Once diagnosed, they use ICD-10 for onychomycosis for medical documentation.
Treatment Options for onychomycosis
Treatment depends on the severity. Options include:
Treatment | Description |
Topical Creams | Applied directly to the nail |
Oral Antifungals | Pills to kill the fungus from inside |
Laser Therapy | Light-based treatment to target fungus |
Nail Removal | In severe cases |
Related Skin Conditions and Their Codes
Other ICD 10 Related Terms
Besides nails, fungi can affect other parts of the body. Let’s look at related codes and terms:
Term | Use Case |
dx code for onychomycosis | Used during medical diagnosis |
icd 10 jock itch | Fungal infection in groin area |
tinea cruris icd 10 | Medical term for jock itch |
icd 10 code onychomycosis | Alternative search term for nail fungus |
How to Avoid Nail Fungus

Here are some prevention tips:
- Keep your feet clean and dry
- Don’t share nail tools
- Wear breathable socks
- Change socks regularly
Who is at Risk of Onychomycosis?
People with diabetes or weak immune systems are more prone. Risk increases with age. Athletes who use public showers or pools often are at higher risk too.
Some coding errors to Avoid
- Don’t use outdated codes
- Don’t mix up jock itch icd 10 with nail fungus codes
- Make sure the fungus is confirmed before coding
Final Words- icd 10 for onychomycosis
Using the right ICD code helps with diagnosis. It also helps with billing. B35.1 is the standard code for Onychomycosis icd 10. You may also see code nail fungus icd 10. They all point to the same issue.
Don’t ignore changes in your nails. Visit a provider. Early treatment makes recovery easier.
Prospect Healthcare Solutions is here to help. We provide accurate coding support. We work with clinics and doctors. Our goal is to make the coding process smooth and error-free.
At Prospect Healthcare Solutions, we care about your health. We support clinics and healthcare teams with expert ICD coding services.
FAQS
Q: Are icd 10 for onychomycosis, b35.1, and nail fungus icd 10 the same?
Yes
Q: Can onychomycosis icd 10 used for fungal infections on any nail, whether finger or toe?
Yes, the same code covers both.
Q:How many times should I use onychomycosis icd 10 when coding?
Use it once per diagnosis note but include it in billing and documentation as needed.
Q:What does dx code for onychomycosis mean?
“DX” means diagnosis. It is the code used by doctors.
Q:Are there other infections with similar ICD codes?
Yes. jock itch icd 10 and tinea cruris icd 10 are related.