Thyrotoxicosis [hyperthyroidism] (E05) ICD-10-CM
The E05 code range covers thyrotoxicosis [hyperthyroidism] with 22 ICD-10-CM diagnosis codes. 14 of them are billable and valid for claim submission in fiscal year 2027, and the category headers group them but cannot themselves be billed.
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
Codes in the E05 Range 22 codes · 14 billable
- E05 Thyrotoxicosis [hyperthyroidism]Non-billable
- E05.0 Thyrotoxicosis with diffuse goiterNon-billable
- E05.00 Thyrotoxicosis with diffuse goiter without thyrotoxic crisis or storm
- E05.01 Thyrotoxicosis with diffuse goiter with thyrotoxic crisis or storm
- E05.1 Thyrotoxicosis with toxic single thyroid noduleNon-billable
- E05.10 Thyrotoxicosis with toxic single thyroid nodule without thyrotoxic crisis or storm
- E05.11 Thyrotoxicosis with toxic single thyroid nodule with thyrotoxic crisis or storm
- E05.2 Thyrotoxicosis with toxic multinodular goiterNon-billable
- 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 tissueNon-billable
- E05.30 Thyrotoxicosis from ectopic thyroid tissue without thyrotoxic crisis or storm
- E05.31 Thyrotoxicosis from ectopic thyroid tissue with thyrotoxic crisis or storm
- E05.4 Thyrotoxicosis factitiaNon-billable
- E05.40 Thyrotoxicosis factitia without thyrotoxic crisis or storm
- E05.41 Thyrotoxicosis factitia with thyrotoxic crisis or storm
- E05.8 Other thyrotoxicosisNon-billable
- E05.80 Other thyrotoxicosis without thyrotoxic crisis or storm
- E05.81 Other thyrotoxicosis with thyrotoxic crisis or storm
- E05.9 Thyrotoxicosis, unspecifiedNon-billable
- E05.90 Thyrotoxicosis, unspecified without thyrotoxic crisis or storm
- E05.91 Thyrotoxicosis, unspecified with thyrotoxic crisis or storm
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the E05 range.
Thyrotoxicosis
A hypermetabolic syndrome caused by excess THYROID HORMONES which may come from endogenous or exogenous sources. The endogenous source of hormone may be thyroid HYPERPLASIA; THYROID NEOPLASMS; or hormone-producing extrathyroidal tissue. Thyrotoxicosis is characterized by NERVOUSNESS; TACHYCARDIA; FATIGUE; WEIGHT LOSS; heat intolerance; and excessive SWEATING.
About the E05 Code Range
Thyrotoxicosis, also called hyperthyroidism, means an overactive thyroid. These codes distinguish its listed forms and whether a thyrotoxic crisis or storm occurs.
E05.0 identifies diffuse goiter. E05.1 identifies a single thyroid nodule, while E05.2 identifies multinodular goiter. E05.3 names thyroid tissue outside its usual location, and E05.4 names thyrotoxicosis factitia. E05.8 identifies other thyrotoxicosis; E05.9 is unspecified. Each subdivision separates cases with a thyrotoxic crisis or storm from cases without one.
Questions About This Page
How many billable codes are in the E05 range?
Of the 22 codes in this range, 14 are billable and valid for claim submission from October 1, 2026 through September 30, 2027. Category header codes group them but cannot be reported on claims.
What does the E05 range classify?
The range classifies thyrotoxicosis [hyperthyroidism]. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
