E03.1 vs E03.4
E03.1 (Congenital hypothyroidism without goiter) compared with E03.4 (Atrophy of thyroid (acquired)), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.
Can these codes be reported together?
No — do not report together. E03.4 carries an Excludes1 note covering E03.1: “congenital atrophy of thyroid (E03.1)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
Side by side
| E03.1Congenital hypothyroidism without goiter | E03.4Atrophy of thyroid (acquired) | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | E00-E89 — Endocrine, Nutritional and Metabolic Diseases (E00-E89) | E00-E89 — Endocrine, Nutritional and Metabolic Diseases (E00-E89) |
| Definition | Congenital hypothyroidism without goiter is a billable ICD-10-CM diagnosis code (E03.1). | Atrophy of thyroid (acquired) is a billable ICD-10-CM diagnosis code (E03.4). |
| Includes | Aplasia of thyroid (with myxedema) Congenital atrophy of thyroid Congenital hypothyroidism NOS | — |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources