E04.0 Nontoxic diffuse goiter

Billable ICD-10-CM code, FY2026.

Applicable to

• Diffuse (colloid) nontoxic goiter
• Simple nontoxic goiter

Applies from E04 Other nontoxic goiter

Excludes1 (never code together)

• congenital goiter (NOS) (diffuse) (parenchymatous) (E03.0)
• iodine-deficiency related goiter (E00-E02)

Risk adjustment (HCC)

• RxHCC V08: HCC 44 — Thyroid Disorders

MS-DRG index

Defines the logic of DRG(s) 643-645 in MDC 10.

Approximate ICD-9-CM (GEMs)

• 240.0 Goiter, specified as simple (approximate)

Code annotations containing back-references to E04.0

Back-references to E04

• Code First: G63 Polyneuropathy in diseases classified elsewhere ("endocrine disease, except diabetes (E00-E07, E15-E16, E20-E34)")

Diagnosis Index entries for E04.0

• Bronchocele meaning goiter
• Goiter (plunging) (substernal) › nontoxic › diffuse (colloid)
• Goiter (plunging) (substernal) › nontoxic › simple
• Goiter (plunging) (substernal) › simple

Nearby codes

• E04 Other nontoxic goiter
• E04.0 Nontoxic diffuse goiter (this code)
• E04.1 Nontoxic single thyroid nodule
• E04.2 Nontoxic multinodular goiter
• E04.8 Other specified nontoxic goiter
• E04.9 Nontoxic goiter, unspecified