Iodine-deficiency related thyroid disorders and allied conditions (E01) ICD-10-CM
The E01 code range covers iodine-deficiency related thyroid disorders and allied conditions with 5 ICD-10-CM diagnosis codes. 4 of them are billable and valid for claim submission in fiscal year 2026, 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 E01 Range 5 codes · 4 billable
- E01 Iodine-deficiency related thyroid disorders and allied conditionsNon-billable
- E01.0 Iodine-deficiency related diffuse (endemic) goiter
- E01.1 Iodine-deficiency related multinodular (endemic) goiter
- E01.2 Iodine-deficiency related (endemic) goiter, unspecified
- E01.8 Other iodine-deficiency related thyroid disorders and allied conditions
About the E01 Code Range
The ICD-10 codes starting with E01 are specifically used to classify thyroid disorders caused by iodine deficiency. These codes help identify various types of goiter and related thyroid conditions that occur due to insufficient iodine intake.
These codes cover several clinically important forms of thyroid enlargement, such as E01.0 for diffuse (endemic) goiter, often called simple goiter or diffuse endemic goiter. The code E01.1 refers to multinodular (endemic) goiter, also known as multinodular goiter or iodine-deficiency-related multinodular endemic goiter. When the specific type of iodine-deficiency goiter is not detailed, E01.2 for unspecified endemic goiter is used. Additionally, E01.8 captures other iodine-deficiency thyroid disorders like iodine hypothyroidism and iodine deficiency syndrome. Understanding these synonyms aids coders and healthcare professionals in selecting the accurate ICD-10 code for patients presenting with iodine-related thyroid abnormalities.
Questions About This Page
How many billable codes are in the E01 range?
Of the 5 codes in this range, 4 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.
What does the E01 range classify?
The range classifies iodine-deficiency related thyroid disorders and allied conditions. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
