E05.9

Thyrotoxicosis, unspecified

FY2027Chapter 4: Endocrine, nutritional and metabolic diseases/E00–E07 Disorders of thyroid gland

Non-billable headerNot valid on its own. Use one of the more specific codes under it.

E05.9 is a non-billable ICD-10-CM code header for thyrotoxicosis, unspecified. Report a more specific code from it instead. It is part of the FY2027 code set, effective October 1, 2026. The more specific codes under it are E05.90 Thyrotoxicosis, unspecified without thyrotoxic crisis or storm and E05.91 Thyrotoxicosis, unspecified with thyrotoxic crisis or storm. Its coding notes include 3 Excludes1 entries.

Excludes1

Not coded here. The listed conditions generally should not be reported together.

Inherited from E05 Thyrotoxicosis [hyperthyroidism]
  • chronic thyroiditis with transient thyrotoxicosis (E06.2)
  • neonatal thyrotoxicosis (P72.1)
Also from chapter/block level (1 note)
Inherited from Chapter 4 Endocrine, nutritional and metabolic diseases
  • transitory endocrine and metabolic disorders specific to newborn (P70-P74)

Inclusion terms

Conditions classified to this code.

This code
  • Hyperthyroidism NOS

Notes

Also from chapter/block level (1 note)
Inherited from Chapter 4 Endocrine, nutritional and metabolic diseases
  • All neoplasms, whether functionally active or not, are classified in Chapter 2. Appropriate codes in this chapter (i.e. E05.8, E07.0, E16-E31, E34.-) may be used as additional codes to indicate either functional activity by neoplasms and ectopic endocrine tissue or hyperfunction and hypofunction of endocrine glands associated with neoplasms and other conditions classified elsewhere.

More specific codes under E05.9 2