E05.21 – Thyrotoxicosis with toxic multinodular goiter with thyrotoxic crisis or storm
ICD-10-CM 2027 diagnosis code · Disorders of thyroid gland
ICD-10-CM code
E05.21
- Code
E05.21(claims format:E0521)- Description
- Thyrotoxicosis with toxic multinodular goiter with thyrotoxic crisis or storm
- Short description
- Thyrotxcosis w toxic multinodular goiter w thyrotoxic crisis
- Billable
- Yes – valid for HIPAA-covered transactions
- 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 › E05.2
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
E05 – Thyrotoxicosis [hyperthyroidism]
Excludes1 (not coded here):
E05.2 – Thyrotoxicosis with toxic multinodular goiter
Applicable to:
- Toxic nodular goiter NOS
Index terms for E05.21
Entries in the ICD-10-CM alphabetic index that lead to this code:
- Plummer's disease, with thyroid storm
- Goiter, nodular, toxic, with thyroid storm
- Struma, nodosa, toxicosa, with thyroid storm
- Nodule, thyroid, with thyrotoxicosis, with thyroid storm
- Goiter, nodular, with, thyrotoxicosis, with thyroid storm
- Thyrotoxicosis, with, goiter, nodular, with thyroid storm
- Goiter, nodular, with, hyperthyroidism, with thyroid storm
- Hyperthyroidism, with, goiter, nodular, with thyroid storm
- Struma, nodosa, toxicosa, multinodular, with thyroid storm
- Thyrotoxicosis, with, goiter, multinodular, with thyroid storm
- Struma, nodosa, toxic or with hyperthyroidism, with thyroid storm
- Nodule, thyroid, toxic or with hyperthyroidism, with thyroid storm
- Goiter, multinodular, toxic or with hyperthyroidism, with thyroid storm
- Struma, nodosa, toxic or with hyperthyroidism, multinodular, with thyroid storm
Related codes in E05.2
Frequently asked questions
What is ICD-10 code E05.21?
E05.21 is the ICD-10-CM code for thyrotoxicosis with toxic multinodular goiter with thyrotoxic crisis or storm, in the block E00-E07 (Disorders of thyroid gland).
Is E05.21 a billable code?
Yes. E05.21 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does E05.21 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.