Ectodermal dysplasia (anhidrotic)

This code represents a group of inherited disorders characterized by abnormal development of two or more ectodermal structures, such as skin, hair, nails, teeth, and sweat glands. The "anhidrotic" subtype specifically indicates a significant reduction or absence of sweat gland function, leading to heat intolerance. Patients may present with sparse hair, abnormal teeth (e.g., conical or missing), and dry skin.

Assign this code when documentation confirms a diagnosis of ectodermal dysplasia, particularly when the anhidrotic form is specified or implied by clinical findings like hypohidrosis or anhidrosis. Supporting documentation includes genetic testing results, clinical examination findings detailing ectodermal abnormalities, and physician's diagnostic statements.

• Do not code this condition with Ellis-van Creveld syndrome (Q77.6) due to the Excludes1 note.
• Specify any associated manifestations or complications with additional codes, such as dental anomalies (K00.-) or skin conditions (L85.8).
• Ensure the physician's documentation clearly distinguishes between different types of ectodermal dysplasia if known, as some have specific codes.