Other hypothyroidism (E03) ICD-10-CM
The E03 code range covers other hypothyroidism with 9 ICD-10-CM diagnosis codes. 8 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 E03 Range 9 codes · 8 billable
- E03 Other hypothyroidismNon-billable
- E03.0 Congenital hypothyroidism with diffuse goiter
- E03.1 Congenital hypothyroidism without goiter
- E03.2 Hypothyroidism due to medicaments and other exogenous substances
- E03.3 Postinfectious hypothyroidism
- E03.4 Atrophy of thyroid (acquired)
- E03.5 Myxedema coma
- E03.8 Other specified hypothyroidism
- E03.9 Hypothyroidism, unspecified
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the E03 range.
Acquired Thyroid Gland Atrophy
Atrophy of the thyroid gland, the cause of which is not present at birth.
Hypothyroidism
A syndrome that results from abnormally low secretion of THYROID HORMONES from the THYROID GLAND, leading to a decrease in BASAL METABOLIC RATE. In its most severe form, there is accumulation of MUCOPOLYSACCHARIDES in the SKIN and EDEMA, known as MYXEDEMA. It may be primary or secondary due to other pituitary disease, or hypothalamic dysfunction.
Myxedema Coma
A life-threatening condition characterized by altered mental status and defective thermoregulation. It is seen in individuals with severe, decompensated hypothyroidism.
About the E03 Code Range
Hypothyroidism means an underactive thyroid. These codes describe forms distinguished by when they develop, what they follow, or how they are described.
E03.0 and E03.1 describe hypothyroidism present from birth, with or without goiter. E03.2 identifies medication or other external substances as the cause, while E03.3 identifies a preceding infection.
E03.4 describes acquired thyroid atrophy, and E03.5 describes myxedema coma. E03.8 identifies other specified hypothyroidism; E03.9 is for hypothyroidism without a specified type.
Questions About This Page
How many billable codes are in the E03 range?
Of the 9 codes in this range, 8 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 E03 range classify?
The range classifies other hypothyroidism. 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.
