ICD-10 Guide

Autoimmune Thyroiditis

ICD-10 Coding for Autoimmune Thyroiditis(E06.3)

PRIMARY SPECIALTYEndocrinology

COMPLEXITYHigh

LAST UPDATED09/15/2025

Sam Tuffun, PT, DPT

Physical Therapist | Medical Coding & Billing Contributor

Diagnosis Overview

What is Autoimmune Thyroiditis?

Essential facts and insights about Autoimmune Thyroiditis

Key Clinical Considerations:

Fatigue, weight changes, sensitivity to cold, dry skin, hair loss
Elevated TSH levels, low free T4, positive thyroid antibodies (anti-TPO, anti-Tg)
Goiter, bradycardia, dry skin, and hair thinning on physical examination

Clinical Information

Clinical Criteria & Documentation Requirements

Patient history, physical examination findings, lab results, treatment plan
ICD-10-CM codes for autoimmune thyroiditis (e.g., E06.3)
Example: 'Patient presents with fatigue and weight gain; lab results show elevated TSH and positive anti-TPO antibodies.'

Coding Guidelines

Usage Guidelines & Examples

Follow guidelines for specificity in coding autoimmune thyroiditis.
Common errors include using incorrect codes for related thyroid disorders.

Code Exclusions

Important Exclusions

Other forms of thyroiditis (e.g., subacute thyroiditis), hyperthyroidism, and hypothyroidism due to other causes.
Alternative codes for related conditions such as E03.9 (Hypothyroidism, unspecified).

Specialty Focus

Primary Specialty

Endocrinology

Specialty Applications

Adults, particularly women aged 30-50, and patients with a family history of autoimmune diseases.
Endocrinology clinics, primary care settings, and specialty thyroid centers.

Coding Complexity

High Complexity

This diagnosis requires careful attention to:

Comprehensive clinical documentation
Accurate code selection based on clinical criteria
Proper exclusion considerations
Specialty-specific coding guidelines

Documentation

Documentation Templates

Billing Information

Billing Considerations

Ensure proper documentation for billing
Verify code specificity requirements
Check for any additional codes needed
Review payer-specific guidelines

Common Issues

Insufficient clinical documentation
Incorrect code selection
Missing supporting diagnoses
Timing and frequency documentation

Frequently Asked Questions

What are the documentation requirements?

Document clinical symptoms, lab results, and treatment plans.

What are the billing considerations?

Ensure accurate coding to reflect the diagnosis and any associated conditions.

Autoimmune Thyroiditis

Diagnosis Overview

Key Clinical Considerations:

Clinical Information

Clinical Criteria & Documentation Requirements

Coding Guidelines

Usage Guidelines & Examples

Code Exclusions

Important Exclusions

Related ICD-10 Codes

Related CPT Codes

Specialty Focus

Primary Specialty

Specialty Applications

Coding Complexity

Documentation

Documentation Templates

Billing Information

Billing Considerations

Common Issues

Frequently Asked Questions

What are the documentation requirements?

What are the billing considerations?

Autoimmune Thyroiditis

Diagnosis Overview

Key Clinical Considerations:

Clinical Information

Clinical Criteria & Documentation Requirements

Coding Guidelines

Usage Guidelines & Examples

Code Exclusions

Important Exclusions

Related ICD-10 Codes

Related CPT Codes

Specialty Focus

Primary Specialty

Specialty Applications

Coding Complexity

Documentation

Documentation Templates

Billing Information

Billing Considerations

Common Issues

Frequently Asked Questions

What are the documentation requirements?

What are the billing considerations?