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ICD-10 Code E06.4: Drug-induced thyroiditis

E06.4 is a billable ICD-10 diagnosis code used to classify Drug-induced thyroiditis in medical records and claims. You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records. ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Endocrine, nutritional and metabolic diseases (E00-E89).

What is this code?

ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Endocrine, nutritional and metabolic diseases (E00-E89).

šŸ“‹Clinical overview

This ICD-10 code is commonly used when documentation describes thyroiditis or another inflammatory thyroid disorder. The most accurate code depends on whether the record identifies acute, subacute, autoimmune, drug-induced, chronic, or unspecified thyroid inflammation.

When is it used?

  • May be used when a clinician documents drug-induced thyroiditis in a patient's medical record.
  • May appear in hospital records, claims, referrals, and clinical documentation.
  • This code can be used as a clinically usable diagnosis entry in standardized coding workflows.

What it does not mean

  • A code alone does not explain severity, treatment plan, or outcome.
  • A medical code should not be treated as a substitute for a doctor's diagnosis or advice.

šŸ©ŗClinical context

When commonly used
  • Primary-care, endocrinology, urgent-care, and inpatient workflows where thyroid pain, thyroid enlargement, inflammation, or abnormal thyroid-function testing is part of the active assessment.
  • Coding workflows where the chart identifies the inflammatory pattern, mechanism, medication relationship, or transient thyrotoxic phase that changes final code specificity.
Common management context
  • Evaluation often includes thyroid-function testing, inflammatory-marker review, thyroid antibody testing, symptom assessment for neck pain or thyrotoxic or hypothyroid features, and endocrine follow-up planning.
  • Documentation usually becomes more specific when the chart identifies acute versus subacute versus autoimmune versus drug-induced thyroiditis, or clarifies another chronic inflammatory pattern.
  • Specialist context already linked on this page includes Endocrinologist, General Physician.

šŸ”Key distinctions

Important notes
  • This ICD-10 family captures inflammatory thyroid disease rather than noninflammatory hypothyroidism, thyrotoxicosis, thyroid nodules, or other endocrine thyroid conditions.
  • Inflammatory pattern detail, such as acute, subacute, autoimmune, drug-induced, chronic with transient thyrotoxicosis, other chronic, or unspecified thyroiditis, drives final code specificity inside this family.
  • Drug-induced thyroiditis is coded separately from acute, subacute, autoimmune, chronic-other, and unspecified thyroiditis when the record links the thyroid inflammation to a medication or other exogenous exposure.
  • Documentation that describes thyroiditis is coded differently from hypothyroidism, thyrotoxicosis, thyroid nodule disease, or other thyroid disorders without documented inflammatory context.
Related codes to consider
E06.0Acute thyroiditis
Related thyroiditis ICD-10 code; documentation often becomes more specific when the chart identifies acute versus subacute versus autoimmune versus drug-induced inflammation, or clarifies another chronic thyroiditis pattern.
E06.1Subacute thyroiditis
Related thyroiditis ICD-10 code; documentation often becomes more specific when the chart identifies acute versus subacute versus autoimmune versus drug-induced inflammation, or clarifies another chronic thyroiditis pattern.
E06.2Chronic thyroiditis with transient thyrotoxicosis
Related thyroiditis ICD-10 code; documentation often becomes more specific when the chart identifies acute versus subacute versus autoimmune versus drug-induced inflammation, or clarifies another chronic thyroiditis pattern.
E06.3Autoimmune thyroiditis
Related thyroiditis ICD-10 code; documentation often becomes more specific when the chart identifies acute versus subacute versus autoimmune versus drug-induced inflammation, or clarifies another chronic thyroiditis pattern.

Code hierarchy

chapter
4Endocrine, nutritional and metabolic diseases (E00-E89)
block
E00-E07Disorders of thyroid gland
category
E06Thyroiditis
currentE06

Official coding notes

Applicable to
  • code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)
Use additional code
  • code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)

Where you may see this code

You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records.

Related specialists

EndocrinologistGeneral Physician

Coding guidelines

Compatibility

Legacy and official ICD code match exactly.
Legacy codes
E06.4

Common synonyms

Drug-induced thyroiditis

Frequently asked questions

Code details

CodeE06.4
SystemICD10
Display nameDrug-induced thyroiditis
ChapterEndocrine, nutritional and metabolic diseases (E00-E89)
BlockDisorders of thyroid gland

Flags

BillableYes
Valid clinical useYes

Source

SourceICD-10
Version2026-annual
Releaseannual
Year2026

Index terms

Matched terms
ThyroiditisThyroiditisThyroiditis

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.