E05.9 – Thyrotoxicosis, unspecified
ICD-10-CM 2027 diagnosis code · Disorders of thyroid gland
ICD-10-CM code
E05.9
- Code
E05.9(claims format:E059)- Description
- Thyrotoxicosis, unspecified
- Billable
- No – use a more specific code below
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 4. Endocrine, nutritional and metabolic diseases (E00-E89)
- Block
- E00-E07 Disorders of thyroid gland
- Parent codes
- E05
Billable codes under E05.9
E05.9 is a header code and cannot be used on claims. Choose the most specific code:
Notes for E05.9
Applicable to:
- Hyperthyroidism NOS
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
E05 – Thyrotoxicosis [hyperthyroidism]
Related codes in E05
Frequently asked questions
What is ICD-10 code E05.9?
E05.9 is the ICD-10-CM code for thyrotoxicosis, unspecified, in the block E00-E07 (Disorders of thyroid gland).
Is E05.9 a billable code?
No. E05.9 is a header code with more specific child codes; report one of the billable codes listed above.
What category does E05.9 belong to?
It belongs to category E05 – Thyrotoxicosis [hyperthyroidism].
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.