E03.5 – Myxedema coma
ICD-10-CM 2027 diagnosis code · Disorders of thyroid gland
ICD-10-CM code
E03.5
- Code
E03.5(claims format:E035)- Description
- Myxedema coma
- 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
- E03
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
E03 – Other hypothyroidism
Index terms for E03.5
Entries in the ICD-10-CM alphabetic index that lead to this code:
Related codes in E03
- E03.0 – Congenital hypothyroidism with diffuse goiterBillable
- E03.1 – Congenital hypothyroidism without goiterBillable
- E03.2 – Hypothyroidism due to medicaments and other exogenous substancesBillable
- E03.3 – Postinfectious hypothyroidismBillable
- E03.4 – Atrophy of thyroid (acquired)Billable
- E03.8 – Other specified hypothyroidismBillable
- E03.9 – Hypothyroidism, unspecifiedBillable
Frequently asked questions
What is ICD-10 code E03.5?
E03.5 is the ICD-10-CM code for myxedema coma, in the block E00-E07 (Disorders of thyroid gland).
Is E03.5 a billable code?
Yes. E03.5 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does E03.5 belong to?
It belongs to category E03 – Other hypothyroidism.
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.