E05.30 Thyrotoxicosis from ectopic thyroid tissue without thyrotoxic crisis or storm

Billable ICD-10-CM code, FY2026.

Applies from E05 Thyrotoxicosis [hyperthyroidism]

Excludes1 (never code together)

• chronic thyroiditis with transient thyrotoxicosis (E06.2)
• neonatal thyrotoxicosis (P72.1)

Risk adjustment (HCC)

• RxHCC V08: HCC 44 — Thyroid Disorders

MS-DRG index

Defines the logic of DRG(s) 011-013 in MDC PRE.

Approximate ICD-9-CM (GEMs)

• 242.40 Thyrotoxicosis from ectopic thyroid nodule without mention of thyrotoxic crisis or storm

Code annotations containing back-references to E05.30

Back-references to E05.3

• Code First: I43 Cardiomyopathy in diseases classified elsewhere ("thyrotoxicosis (E05.0-E05.9-)")

Back-references to E05

• Code First: G63 Polyneuropathy in diseases classified elsewhere ("endocrine disease, except diabetes (E00-E07, E15-E16, E20-E34)")
• Code First: G73.3 Myasthenic syndromes in other diseases classified elsewhere ("thyrotoxicosis (E05.-)")
• Code First: G99.0 Autonomic neuropathy in diseases classified elsewhere ("hyperthyroidism (E05.-)")
• Code Also: I27.29 Other secondary pulmonary hypertension ("hyperthyroidism (E05.-)")
• Code First: M14.8 Arthropathies in other specified diseases classified elsewhere ("thyrotoxicosis [hyperthyroidism] (E05.-)")

Diagnosis Index entries for E05.30

• Hyperthyroidism (latent) (pre-adult) (recurrent) › due to ectopic thyroid tissue
• Thyrotoxicosis (recurrent) › due to › ectopic thyroid nodule or tissue

Nearby codes

• E05.11 Thyrotoxicosis with toxic single thyroid nodule with thyrotoxic crisis or storm
• E05.2 Thyrotoxicosis with toxic multinodular goiter
• E05.20 Thyrotoxicosis with toxic multinodular goiter without thyrotoxic crisis or storm
• E05.21 Thyrotoxicosis with toxic multinodular goiter with thyrotoxic crisis or storm
• E05.3 Thyrotoxicosis from ectopic thyroid tissue
• E05.30 Thyrotoxicosis from ectopic thyroid tissue without thyrotoxic crisis or storm (this code)
• E05.31 Thyrotoxicosis from ectopic thyroid tissue with thyrotoxic crisis or storm
• E05.4 Thyrotoxicosis factitia
• E05.40 Thyrotoxicosis factitia without thyrotoxic crisis or storm
• E05.41 Thyrotoxicosis factitia with thyrotoxic crisis or storm
• E05.8 Other thyrotoxicosis