ICD-10 E06.3
Billable / SpecificAutoimmune thyroiditis
About ICD-10-CM E06.3
ICD-10-CM code E06.3 represents Autoimmune thyroiditis. This is a billable/specific code in the Endocrine, Nutritional, and Metabolic chapter (block E06). The 2026 edition of ICD-10-CM E06.3 became effective on October 1, 2025.
Inclusion Terms / Approximate Synonyms
Clinical terms and conditions classified under E06.3. Per CMS ICD-10-CM Tabular 2026.
- Hashimoto's thyroiditis
- Hashitoxicosis (transient)
- Lymphadenoid goiter
- Lymphocytic thyroiditis
- Struma lymphomatosa
Medicare LCD Coverage for E06.3
Local Coverage Determinations (LCDs) from CMS MACs that list E06.3 as a covered diagnosis.
Showing top 10 of 30 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing E06.3.
1 Cigna
2 Medicare
1 Aetna
CPT Codes Commonly Billed with E06.3
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
- 84443 TSH — hypothyroidism, hyperthyroidism, thyroiditis, weight loss, weight gain, post-surgical hypothyroidism, fatigue, routine exam, screening Laboratory
- 76942 Ultrasound-guided thyroid biopsy — thyroid nodule, multinodular goiter, hyperthyroidism, thyroiditis, thyroid cancer, thyroid neoplasm, lymphadenopathy, abnormal thyroid function Endocrinology
Convert E06.3 to ICD-9-CM
Per CMS General Equivalence Mappings (GEMs), useful for legacy data review and historical claim analysis.
| ICD-10 | ICD-9 | Mapping Flags |
|---|---|---|
| E06.3 | 2452 | 00000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To E06.3
Other codes in section E00-E07 (Disorders of thyroid gland).
ICD-10 E06.3, Billing FAQ
Is ICD-10 code E06.3 billable? +
Yes, E06.3 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
What other names or terms map to E06.3? +
ICD-10 E06.3 includes: Hashimoto's thyroiditis; Hashitoxicosis (transient); Lymphadenoid goiter, and 2 more clinical synonyms.
What CPT codes are commonly billed with E06.3? +
Procedures frequently paired with E06.3 include: 84443, 76942.
What ICD-9 codes does E06.3 map to? +
Per CMS GEMs, E06.3 maps to ICD-9 codes: 2452. Useful for legacy data review and historical claim analysis.
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on July 16, 2026.
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