Acquired hypertrichosis lanuginosa

This code describes the development of fine, downy, unpigmented hair (lanugo) in areas not typically associated with such growth, occurring after birth. It is an acquired condition, meaning it develops later in life rather than being congenital. This type of hypertrichosis is often a paraneoplastic phenomenon or associated with other systemic illnesses.

Use this code when documentation specifies the new onset of lanugo-like hair growth in an adult or child. This diagnosis is typically supported by a physical examination noting the characteristic fine, soft, unpigmented hair, often in widespread distribution. It is crucial to differentiate from other forms of hypertrichosis.

• Always query for the underlying cause if not documented, as acquired hypertrichosis lanuginosa is often a symptom of another disease.
• Do not confuse with congenital hypertrichosis, which has different ICD-10-CM codes.
• Ensure the documentation clearly states "acquired" to support the use of this specific code.