ICD-10-CM 2027
ICD-10 code for Thelarche
From the official ICD-10-CM alphabetic index entry “Thelarche, premature”. Page updated September 29, 2026.
About coding Thelarche
The ICD-10-CM code for Thelarche is E30.8 (Other disorders of puberty).
Within E30, choose E30.8 (Other disorders of puberty) only when documentation doesn't support a more specific option: delayed puberty (E30.0), Precocious puberty (E30.1) and disorder of puberty, unspecified (E30.9).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 643 (Endocrine Disorders with MCC, relative weight 1.6139), DRG 644 (Endocrine Disorders with CC, relative weight 1.0044) and DRG 645 (Endocrine Disorders without CC/MCC, relative weight 0.7459), in MDC 10 (Endocrine, Nutritional and Metabolic Diseases and Disorders), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
Common questions about Thelarche ICD-10 codes
What is the ICD-10 code for Thelarche?
- E30.8 — Other disorders of puberty.
Is E30.8 billable?
- Yes. E30.8 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can E30.8 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict E30.8 as a principal diagnosis.
Is E30.8 a CC or MCC?
- No. E30.8 is neither a CC nor an MCC under MS-DRG v44.0.