E05.90
Thyrotoxicosis, unspecified without thyrotoxic crisis or storm
E05.90 (also written E0590) is a billable ICD-10-CM diagnosis code for thyrotoxicosis, unspecified without thyrotoxic crisis or storm. It is part of the FY2027 code set, effective October 1, 2026. It is one of the 14 codes in category E05 (Thyrotoxicosis [hyperthyroidism]). The Alphabetic Index lists it under 22 entries. Its coding notes include 3 Excludes1 entries.
Excludes1
Not coded here. The listed conditions generally should not be reported together.
Care settings
How CMS programs treat this code. These are CMS claim edits and list entries, not coverage or eligibility rules.
Home Health Primary
Accepted as the primary (principal) diagnosis on a home health claim. The Home Health Grouper assigns it to the MMTA - Endocrine clinical group.
Source: CMS Home Health Grouper Software v07.2.26, effective October 1, 2026Notes
Also from chapter/block level (1 note)
- All neoplasms, whether functionally active or not, are classified in Chapter 2. Appropriate codes in this chapter (i.e. E05.8, E07.0, E16-E31, E34.-) may be used as additional codes to indicate either functional activity by neoplasms and ectopic endocrine tissue or hyperfunction and hypofunction of endocrine glands associated with neoplasms and other conditions classified elsewhere.
Alphabetic Index terms
Terms the official Alphabetic Index lists for this code. 22 entries
- 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
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- 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