E05 – Thyrotoxicosis [hyperthyroidism]
ICD-10-CM 2027 diagnosis code · Disorders of thyroid gland
ICD-10-CM code
E05
- Code
E05(claims format:E05)- Description
- Thyrotoxicosis [hyperthyroidism]
- 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
Billable codes under E05
E05 is a header code and cannot be used on claims. Choose the most specific code:
- E05.0 – Thyrotoxicosis with diffuse goiterHeader (more codes below)
- E05.1 – Thyrotoxicosis with toxic single thyroid noduleHeader (more codes below)
- E05.2 – Thyrotoxicosis with toxic multinodular goiterHeader (more codes below)
- E05.3 – Thyrotoxicosis from ectopic thyroid tissueHeader (more codes below)
- E05.4 – Thyrotoxicosis factitiaHeader (more codes below)
- E05.8 – Other thyrotoxicosisHeader (more codes below)
- E05.9 – Thyrotoxicosis, unspecifiedHeader (more codes below)
Notes for E05
Frequently asked questions
What is ICD-10 code E05?
E05 is the ICD-10-CM code for thyrotoxicosis [hyperthyroidism], in the block E00-E07 (Disorders of thyroid gland).
Is E05 a billable code?
No. E05 is a header code with more specific child codes; report one of the billable codes listed above.
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.