ICD-10-CM
ICD-10 code for Precocious thelarche: E30.8
The ICD-10-CM index points "Precocious thelarche" to E30.8, Other disorders of puberty. E30.8 is a billable code.
Source: CDC ICD-10-CM FY2027 Alphabetic Index file dated June 16, 2026. Publisher page
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