AHA Coding Clinic® for ICD-9 - 2011 Issue 1; Ask the Editor
Trichilemmal (Pilar) Cyst
The patient presents for outpatient surgery for removal of a scalp lesion. The provider documented "skin lesion, scalpâ€“â€“excised." The pathology report indicates "trichilemmal cyst (pilar cyst)." ICD-9-CM classifies a cyst of the scalp as a sebaceous cyst. There is confusion as to whether this should be coded as a trichilemmal or sebaceous cyst. What is the correct diagnosis code for this encounter? ...
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