E05.90 Thyrotoxicosis, unspecified 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)

Applies from E05.9 Thyrotoxicosis, unspecified

Applicable to

• Hyperthyroidism NOS

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)

• 242.90 Thyrotoxicosis without mention of goiter or other cause, and without mention of thyrotoxic crisis or storm

Code annotations containing back-references to E05.90

Back-references to E05.9

• 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 E05.90

• Arthropathy › in (due to) › hyperthyroidism
• Arthropathy › in (due to) › thyrotoxicosis
• Cardiomyopathy (familial) (idiopathic) › metabolic › thyrotoxic
• Cardiomyopathy (familial) (idiopathic) › thyrotoxic
• Chloasma (skin) (idiopathic) (symptomatic) › eyelid › hyperthyroid
• Disease, diseased › heart (organic) › hyperthyroid
• Disease, diseased › heart (organic) › thyrotoxic
• Disease, diseased › thyroid (gland) › heart
• Failure, failed › Note: heart failure stages A, B, C, and D are based on the American College of Cardiology and American Heart Association stages of heart failure, which complement and should not be confused with the New York Heart Association Classification of Heart Failure, into Class I, Class II, Class III, and Class IV › thyrotoxic
• Hyperthyroidism (latent) (pre-adult) (recurrent)
• Myasthenia › syndrome › in › thyrotoxicosis
• Myocardiopathy (congestive) (constrictive) (familial) (hypertrophic nonobstructive) (idiopathic) (infiltrative) (obstructive) (primary) (restrictive) (sporadic) › thyrotoxic
• Myopathy › in (due to) › thyrotoxicosis (hyperthyroidism)
• Myxedema (adult) (idiocy) (infantile) (juvenile) › circumscribed
• Myxedema (adult) (idiocy) (infantile) (juvenile) › localized (pretibial)
• Neuropathy, neuropathic › peripheral (nerve) › autonomic › in (due to) › hyperthyroidism
• Syndrome › Leopold-Levi's
• Syndrome › myasthenic › in › thyrotoxicosis (hyperthyroidism)
• Thyrotoxic › heart disease or failure
• Thyrotoxicosis (recurrent)
• Thyrotoxicosis (recurrent) › heart
• Thyrotoxicosis (recurrent) › heart › failure

Nearby codes

• E05.41 Thyrotoxicosis factitia with thyrotoxic crisis or storm
• E05.8 Other thyrotoxicosis
• E05.80 Other thyrotoxicosis without thyrotoxic crisis or storm
• E05.81 Other thyrotoxicosis with thyrotoxic crisis or storm
• E05.9 Thyrotoxicosis, unspecified
• E05.90 Thyrotoxicosis, unspecified without thyrotoxic crisis or storm (this code)
• E05.91 Thyrotoxicosis, unspecified with thyrotoxic crisis or storm