Epidermal Inclusion Cyst ICD-10-CM Codes | 2023

What ICD-10 Codes are Used for Epidermal Inclusion Cyst?

Epidermal Inclusion Cysts (EIC) are benign skin nodules that arise due to the entrapment of the epidermis into the dermis. These cysts are commonly encountered in clinical practice and can sometimes be mistaken for other skin conditions. 

The ICD-10-CM codes ensure accurate documentation and categorization of EIC, aiding in appropriate patient management and billing. Here's a detailed look at the commonly used codes:

• L72.0 - Epidermal cyst: This code represents the most common type of EIC. These cysts are filled with keratin and can appear anywhere on the body, though frequently found on the face, neck, and trunk. Typically presents as a slow-growing, painless nodule. It may become inflamed or ruptured, leading to pain and possible secondary infection.
• L72.3 - Pilar cyst: While these are technically distinct from EICs, they are closely related. Pilar cysts arise from hair follicles, predominantly found on the scalp. These cysts are smooth, mobile, and filled with keratin. They can occasionally become tender, especially if inflamed or ruptured.
• L72.9 - Follicular cyst of the skin and subcutaneous tissue, unspecified: This is a more general code, capturing cysts that don't have a more specific classification in the ICD-10. These cysts can vary in appearance and location, but they're generally benign and filled with keratin or sebum.
• L72.1 - Trichodermal cyst: Another variant that can be confused with EIC due to its similar appearance. Typically found on the face or upper trunk, these cysts can occasionally rupture, leading to inflammation and possible secondary infection.
• L72.2 - Steatocystoma multiplex: A condition where multiple steatocystomas appear on the body. It presents multiple small, smooth nodules on the chest, arms, and other areas. They contain a sebaceous material.

Check out our Epidermal Inclusion CystICD Codes for a better understanding of their use.

Which Epidermal Inclusion Cyst ICD codes are Billable?

• L72.0: Yes
• L72.3: Yes
• L72.9: Yes
• L72.1: Yes
• L72.2: Yes

Clinical Information

Epidermal Inclusion Cysts (EIC) are benign skin nodules that primarily develop on the face, neck, and trunk. They can occasionally appear on other body parts but are less common.

Growth and Presentation

EICs are typically slow-growing, presenting as flesh-colored nodules. Most EICs are asymptomatic and don't cause discomfort unless they become inflamed or infected.

Causes

EICs can develop spontaneously, but certain factors increase their likelihood:

• Traumatic skin injuries.
• Previous surgical incisions.
• Blocked hair follicles.

Characteristics

The cysts are filled with keratin protein, giving them a firm texture. Some EICs may exhibit a central punctum, a small, dark spot at the center of the cyst.

Treatment:

While EICs are benign and may not require treatment, some individuals opt for removal due to cosmetic concerns or discomfort. Common treatment methods include:

• Surgical excision, where the entire cyst is removed to prevent recurrence.
• Drainage, especially for inflamed or ruptured cysts.
• Intralesional steroid injections to reduce inflammation and size.

It's essential to consult with a dermatologist or skin specialist to determine the best treatment approach for EICs.

Synonyms Include:

• Epidermoid cyst
• Infundibular cyst
• Keratin cyst
• A sebaceous cyst (though technically different)
• Epithelial cyst