ICD-10 E01
Non-Billable HeaderIodine-deficiency related thyroid disorders and allied conditions
About ICD-10-CM E01
ICD-10-CM code E01 represents Iodine-deficiency related thyroid disorders and allied conditions. This is a non-billable header code in the Endocrine, Nutritional, and Metabolic chapter (block E01). The 2026 edition of ICD-10-CM E01 became effective on October 1, 2025. Non-billable codes cannot be used as a primary or secondary diagnosis on a claim, use a more specific child code instead.
Type 1 Excludes
Pure excludes, these codes can never be coded together with E01. The conditions are mutually exclusive (e.g., congenital vs acquired forms).
- congenital iodine-deficiency syndrome (E00.-)
- subclinical iodine-deficiency hypothyroidism (E02)
Medicare LCD Coverage for E01
Local Coverage Determinations (LCDs) from CMS MACs that list E01 as a covered diagnosis.
This doesn't mean the code isn't covered, it means no MAC has issued a Local Coverage Determination naming this specific code. Coverage may still apply under National Coverage Determinations or general medical-necessity rules.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing E01.
3 Cigna
CPT Codes Commonly Billed with E01
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
We don't have CPT pairings indexed for this specific code yet. Use the CPT search above to find common procedures, or check your payer's published medical policy for code-specific guidance.
Codes Adjacent To E01
Other codes in section E00-E07 (Disorders of thyroid gland).
ICD-10 E01, Billing FAQ
Is ICD-10 code E01 billable? +
No, E01 is a non-billable header code. Use a more specific child code from block E01 when submitting claims.
What codes are Type 1 Excludes for E01? +
Type 1 Excludes (never code together with E01): congenital iodine-deficiency syndrome (E00.-); subclinical iodine-deficiency hypothyroidism (E02)
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on May 31, 2026.
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