---
title: "ICD-10-CM E03.4: Atrophy of thyroid (acquired) | BillingBrief"
description: "ICD-10-CM code E03.4: Atrophy of thyroid (acquired). Category, related codes, and the official source, in plain English."
canonical: "https://billingbrief.com/icd10/e03.4/"
language: "en"
---

# E03.4 Atrophy of thyroid (acquired)

ICD-10-CM · [CMS code reference](#source)

**Official ICD-10-CM description:** Atrophy of thyroid (acquired)

## Coding notes

From the ICD-10-CM FY2027 (effective October 1, 2026) tabular list. Notes on a parent code or category apply here too.

### Excludes1

Not coded together with this code. The exception is when the two conditions are unrelated to each other.

-   congenital atrophy of thyroid ([E03.1](https://billingbrief.com/icd10/e03.1/))
-   iodine-deficiency related hypothyroidism (E00-E02)
-   postprocedural hypothyroidism (E89.0)

## Related codes

-   [`E03.0` Congenital hypothyroidism with diffuse goiter ICD-10-CM](https://billingbrief.com/icd10/e03.0/)
-   [`E03.1` Congenital hypothyroidism without goiter ICD-10-CM](https://billingbrief.com/icd10/e03.1/)
-   [`E03.2` Hypothyroidism due to medicaments and other exogenous substances ICD-10-CM](https://billingbrief.com/icd10/e03.2/)
-   [`E03.3` Postinfectious hypothyroidism ICD-10-CM](https://billingbrief.com/icd10/e03.3/)
-   [`E03.5` Myxedema coma ICD-10-CM](https://billingbrief.com/icd10/e03.5/)
-   [`E03.8` Other specified hypothyroidism ICD-10-CM](https://billingbrief.com/icd10/e03.8/)
-   [`E03.9` Hypothyroidism, unspecified ICD-10-CM](https://billingbrief.com/icd10/e03.9/)

## Common questions

### Is E03.4 a billable code?

Yes. E03.4 is a billable ICD-10-CM code in the ICD-10-CM FY2027 (effective October 1, 2026) code set.

## From the source

Official description from [CMS](https://www.cms.gov/medicare/coding-billing/icd-10-codes).
ICD-10-CM FY2027 (effective October 1, 2026).

Code set

ICD-10-CM

Category

E03 Other hypothyroidism

Chapter

Endocrine, nutritional and metabolic diseases

Billable

Yes

Educational reference only. Not medical, legal, or billing advice. Always check the current official code set and payer policy before you bill. [About BillingBrief and our sources](https://billingbrief.com/about/).