E01

Non-Billable

ChapterE00–E89

Rankcategory

Official Description

Iodine-deficiency related thyroid disorders and allied conditions

Metadata & Insights

•2026 ICD-10-CM Edition - Effective October 1, 2025.
•Non-billable category (requires more specific sub-code).
•Chapter 4: Endocrine, Nutritional and Metabolic Diseases (E00-E89).

CH4 Parent Instructions

Excludes1(Not coded here)

transitory endocrine and metabolic disorders specific to newborn (P70-P74)

Instructional Notes

Excludes1(Not coded here)

congenital iodine-deficiency syndrome (E00.-)
subclinical iodine-deficiency hypothyroidism (E02)

Clinical Hierarchy

CH4Endocrine, nutritional and metabolic diseases (E00-E89)

E00-E07Disorders of thyroid gland (E00-E07)

E01Iodine-deficiency related thyroid disorders and allied conditions

E01.0Iodine-deficiency related diffuse (endemic) goiter

E01.1Iodine-deficiency related multinodular (endemic) goiter

E01.2Iodine-deficiency related (endemic) goiter, unspecified

E01.8Other iodine-deficiency related thyroid disorders and allied conditions

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to E01:

chapterCH4

Endocrine, nutritional and metabolic diseases (E00-E89)

View context instructions

Alphabetic Index Mentions

These are Diagnosis Index lookup paths that route to E01. Use them as entry terms for search, then confirm final coding instructions in the Tabular List and notes above.

20 raw paths

Dementia (degenerative (primary)) (persisting) (unspecified severity) (without behavioral disturbance, psychotic disturbance, mood disturbance, and anxiety)2 unique routes

in (due to)(2 variants)

hypothyroidism, acquired(2 variants)

due to iodine deficiency→E01(2 variants)

with behavioral disturbance→E01

Disorder (of)1 unique routes

thyroid (gland)

iodine-deficiency related→E01

Goiter (plunging) (substernal)11 unique routes

cystic

due to iodine-deficiency→E01

due to

iodine-deficiency (endemic)→E01

endemic (iodine-deficiency)→E01(3 variants)

diffuse→E01

multinodular→E01

iodine-deficiency (endemic)→E01(4 variants)

diffuse→E01

multinodular→E01

nodular→E01

nodular (nontoxic) (due to)(2 variants)

endemic→E01

iodine-deficiency→E01

Hypothyroidism (acquired)2 unique routes

due to

iodine-deficiency, acquired→E01

iodine-deficiency (acquired)→E01

Struma3 unique routes

nodosa (simplex)(3 variants)

endemic→E01(2 variants)

multinodular→E01

multinodular

iodine-deficiency related→E01

Thyromegaly1 unique routes

Direct index entry→E01

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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Find surgical and procedural codes related to Iodine-deficiency related thyroid disorders and allied conditions.

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