E05.90 Thyrotoxicosis, unspecified without thyrotoxic crisis or storm

The ICD-10-CM code for Thyrotoxicosis, unspecified without thyrotoxic crisis or storm is E05.90 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Chapter

4: Endocrine, nutritional and metabolic diseases (E00-E89)

Section

E00-E07: Disorders of thyroid gland (E00-E07)

Category E05

22 codes (14 billable)

FY2026 Status

Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to E05.90:

• Thyrotoxicosis (recurrent)
• Hyperthyroidism (latent) (pre-adult) (recurrent)
• Myocardiopathy (congestive) (constrictive) (familial) (hypertrophic nonobstructive) (idiopathic) (infiltrative) (obstructive) (primary) (restrictive) (sporadic) › thyrotoxic
• Myxedema (adult) (idiocy) (infantile) (juvenile) › localized (pretibial)
• Thyrotoxic › heart disease or failure
• Myxedema (adult) (idiocy) (infantile) (juvenile) › circumscribed
• Syndrome › Leopold-Levi's
• Cardiomyopathy (familial) (idiopathic) › thyrotoxic

U.S. Hospital Utilization

• An estimated 112,475 U.S. inpatient stays in 2023 included E05.90 among the documented diagnoses.
• 2,325 stays listed it as the principal diagnosis.

Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.

Official Coding Guidelines

Diabetes mellitus (TOC entry)

a. Diabetes mellitus ................................................................................................................... 39

Obesity (TOC entry)

b. Obesity .................................................................................................................................. 42

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

• CMS — ICD-10-CM Official Code Set and Guidelines, FY2026
• CDC/NCHS — ICD-10-CM Files and Browser Tool
• AHRQ — HCUP National Inpatient Sample, Frequencies by Diagnosis Code (2016–2023)