E03.4 – Atrophy of thyroid (acquired)

ICD-10-CM 2027 diagnosis code · Disorders of thyroid gland

Billable code

ICD-10-CM code E03.4

Code: E03.4 (claims format: E034)
Description: Atrophy of thyroid (acquired)
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 for E03.4

Excludes1 (not coded here):

congenital atrophy of thyroid (E03.1)

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

E03 – Other hypothyroidism

Excludes1 (not coded here):

iodine-deficiency related hypothyroidism (E00-E02)
postprocedural hypothyroidism (E89.0)

Index terms for E03.4

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
E03.5 – Myxedema comaBillable
E03.8 – Other specified hypothyroidismBillable
E03.9 – Hypothyroidism, unspecifiedBillable

Frequently asked questions

What is ICD-10 code E03.4?

E03.4 is the ICD-10-CM code for atrophy of thyroid (acquired), in the block E00-E07 (Disorders of thyroid gland).

Is E03.4 a billable code?

Yes. E03.4 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does E03.4 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.