Thrush ICD-10-CM Codes

Learn about the different thrush ICD-10-CM codes you can use through this guide.

By Matt Olivares on Aug 8, 2025.

What ICD-10 codes are used for thrush?

Thrush, commonly known as oral candidiasis, is a condition characterized by the overgrowth of the Candida fungus, primarily in the mouth and throat. Proper identification and coding of this condition are vital for effective treatment and patient care. They are found under B37 category which is certain infectious and parasitic diseases.

Below are the ICD-10 codes frequently associated with thrush:

B37.0 - Candidal stomatitis: Represents cases diagnosed with oral candidiasis. Patients typically exhibit white patches on the tongue, inner cheeks, and sometimes the throat.
B37.9 - Candidiasis, unspecified: Utilized when the specific form or location of the candidiasis isn't indicated in the patient's medical records.
B37.81 - Candidal esophagitis: Denotes patients suffering from a candida infection in the esophagus. This can be seen as an extension of oral thrush and may cause difficulty swallowing.
B37.83 - Candidal cheilitis: Used for cases where the candida infection is localized to the lips, causing inflammation and discomfort.

Understanding these codes is essential for healthcare providers to ensure accurate diagnosis and appropriate treatment.

Which thrush ICD codes are billable?

All of the aforementioned thrush ICD-10 codes are valid and billable.

Clinical information

Thrush, medically known as oral candidiasis, is a fungal infection primarily observed in the mouth.

Causative agent

The condition arises due to an overgrowth of the candida fungus, which is naturally present in small amounts in the mouth and other body parts.

Symptoms

White or creamy patches on the tongue, inner cheeks, and sometimes extending to the throat.
Redness or soreness, can cause difficulty in swallowing.
Cracking at the corners of the mouth.
A cottony feeling in the mouth or loss of taste.

Risk factors

A weakened immune system, often seen in patients with conditions like HIV/AIDS or those undergoing chemotherapy.
Prolonged use of certain medications, especially antibiotics or corticosteroids.
Smoking, which can irritate the mouth lining.
Wearing dentures, especially if they are not cleaned regularly or don't fit properly.
Conditions like diabetes, which can cause an imbalance in the natural flora of the mouth.

Complications

If left untreated, the infection can spread to the tonsils, esophagus, and other body parts, leading to more severe complications.

Prevention and treatment

Early diagnosis is crucial. Antifungal medications, both topical and oral, are commonly prescribed. Maintaining good oral hygiene can help prevent the recurrence of the infection.

Synonyms include

Oral candidiasis
Candida stomatitis
Moniliasis
Oropharyngeal candidiasis
Yeast infection of the mouth
Neonatal candidiasis
Thrush with candidal meningitis
White spots on mucous membranes due to thrush
Candidal endocarditis
Oral candidiasis of other sites
Thrush-related infectious and parasitic diseases
Thrush of other urogenital sites
Thrush accompanied by hypersensitivity pneumonitis
Thrush accompanied by superficial mycosis

Popular search terms for thrush ICD-10 codes

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Thrush diagnosis codes
ICD-10 codes for thrush

Commonly asked questions

Thrush is a fungal infection caused by an overgrowth of Candida, often appearing as white patches in the mouth or affecting the genital area.

Common symptoms include white patches, redness, soreness, and a burning or itchy sensation in the affected area.

Yes, thrush can cause pain, especially when eating or swallowing, depending on the area affected.

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