U.S. ICD-10-CM · FY 2027

E01 ICD-10-CM Code: Iodine-deficiency related thyroid disorders and allied conditions

A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.

Code definition

Official description

E01

Iodine-deficiency related thyroid disorders and allied conditions

ICD-10-CM diagnosis code · United States clinical modification

Classification

Where E01 sits

  1. 1

    Chapter 4

    Endocrine, nutritional and metabolic diseases (E00-E89)

  2. 2

    Section

    Disorders of thyroid gland (E00-E07)

  3. 3

    Category E01

    Iodine-deficiency related thyroid disorders and allied conditions

  4. 4

    Code E01

    Iodine-deficiency related thyroid disorders and allied conditions

More specific choices

Codes under E01

E01 is a non-billable category. Choose the child code that best matches the documented diagnosis.

Documentation details

Notes for this code

Inclusion terms

No inclusion terms are listed for E01.

Code first

No “code first” instruction is listed for E01.

Use additional code

No “use additional code” instruction is listed for E01.

Excludes1

Conditions that should not be reported together with this code.

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

Excludes2

Conditions not included here that may be reported separately when present.

No Excludes2 note is listed for E01.

Transparency

Source and release

Data release

U.S. ICD-10-CM · FY 2027

Effective date

Oct 1, 2026

This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.

Review the CDC/NCHS ICD-10-CM source

Code-specific guidance

Frequently asked questions

What does ICD-10-CM code E01 mean?

E01 is the FY 2027 U.S. ICD-10-CM code for “Iodine-deficiency related thyroid disorders and allied conditions.”

Is E01 a billable or specific ICD-10-CM code?

No. E01 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.

Where is E01 located in ICD-10-CM?

E01 is listed in Chapter 4, Endocrine, nutritional and metabolic diseases (E00-E89), within Disorders of thyroid gland (E00-E07) (E00–E07), under category E01, Iodine-deficiency related thyroid disorders and allied conditions.

What coding notes are listed for E01?

No inclusion terms are listed for E01 in this reference record. No code-first instruction is listed. Excludes1 notes: congenital iodine-deficiency syndrome (E00.-); subclinical iodine-deficiency hypothyroidism (E02). No Excludes2 note is listed.

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