E05.9

Non-Billable
ChapterE00–E89
Ranksubcategory
Official Description

Thyrotoxicosis, unspecified

Metadata & Insights
  • •2026 ICD-10-CM Edition - Effective October 1, 2025.
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 4: Endocrine, Nutritional and Metabolic Diseases (E00-E89).

Instructional Notes

Includes
  • Hyperthyroidism NOS
General instructions are available for the parent sections:
View CH4 NotesView E05 Notes

Clinical Hierarchy

CH4Endocrine, nutritional and metabolic diseases (E00-E89)
E00-E07Disorders of thyroid gland (E00-E07)
E05Thyrotoxicosis [hyperthyroidism]
E05.9Thyrotoxicosis, unspecified
E05.90Thyrotoxicosis, unspecified without thyrotoxic crisis or storm
E05.91Thyrotoxicosis, unspecified with thyrotoxic crisis or storm

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to E05.9:

categoryE05
Thyrotoxicosis [hyperthyroidism]
View context instructions
chapterCH4
Endocrine, nutritional and metabolic diseases (E00-E89)
View context instructions

Alphabetic Index Mentions

These are Diagnosis Index lookup paths that route to E05.9. Use them as entry terms for search, then confirm final coding instructions in the Tabular List and notes above.

25 raw paths
Arthropathy2 unique routes
in (due to)(2 variants)
hyperthyroidism→E05.9
thyrotoxicosis→E05.9
Cardiomyopathy (familial) (idiopathic)4 unique routes
metabolic(2 variants)
thyrotoxic→E05.9(2 variants)
with thyroid storm→E05.9
thyrotoxic→E05.9(2 variants)
with thyroid storm→E05.9
Chloasma (skin) (idiopathic) (symptomatic)2 unique routes
eyelid(2 variants)
hyperthyroid→E05.9(2 variants)
with thyroid storm→E05.9
Disease, diseased6 unique routes
heart (organic)(4 variants)
hyperthyroid→E05.9(2 variants)
with thyroid storm→E05.9
thyrotoxic→E05.9(2 variants)
with thyroid storm→E05.9
thyroid (gland)(2 variants)
heart→E05.9(2 variants)
with thyroid storm→E05.9
Failure, failed2 unique routes
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(2 variants)
thyrotoxic→E05.9(2 variants)
with
thyroid storm→E05.9
Hyperthyroidism (latent) (pre-adult) (recurrent)2 unique routes
Direct index entry→E05.9
with
storm→E05.9
Myasthenia2 unique routes
syndrome(2 variants)
in(2 variants)
thyrotoxicosis→E05.9(2 variants)
with thyroid storm→E05.9
Myocardiopathy (congestive) (constrictive) (familial) (hypertrophic nonobstructive) (idiopathic) (infiltrative) (obstructive) (primary) (restrictive) (sporadic)2 unique routes
thyrotoxic→E05.9(2 variants)
with storm→E05.9
Myopathy2 unique routes
in (due to)(2 variants)
thyrotoxicosis (hyperthyroidism)→E05.9(2 variants)
with thyroid storm→E05.9
Myxedema (adult) (idiocy) (infantile) (juvenile)1 unique routes
circumscribed→E05.9

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

Find Procedures (ICD-10-PCS)

Find surgical and procedural codes related to Thyrotoxicosis, unspecified.

Search PCS Codes