E06.0 Acute thyroiditis

The ICD-10-CM code for Acute thyroiditis is E06.0 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Chapter

4: Endocrine, nutritional and metabolic diseases (E00-E89)

Section

E00-E07: Disorders of thyroid gland (E00-E07)

Category E06

8 codes (7 billable)

FY2026 Status

Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to E06.0:

• Suppuration, suppurative › thyroid (gland)
• Thyroiditis › pyogenic
• Thyroiditis › suppurative
• Thyroiditis › acute (nonsuppurative) (pyogenic) (suppurative)
• Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic) › thyroid (gland)

Inclusion Terms

• Abscess of thyroid
• Pyogenic thyroiditis
• Suppurative thyroiditis

U.S. Hospital Utilization

• An estimated 590 U.S. inpatient stays in 2023 included E06.0 among the documented diagnoses.
• 155 stays listed it as the principal diagnosis.

Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.

Official Coding Guidelines

Diabetes mellitus (TOC entry)

a. Diabetes mellitus ................................................................................................................... 39

Obesity (TOC entry)

b. Obesity .................................................................................................................................. 42

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

• CMS — ICD-10-CM Official Code Set and Guidelines, FY2026
• CDC/NCHS — ICD-10-CM Files and Browser Tool
• AHRQ — HCUP National Inpatient Sample, Frequencies by Diagnosis Code (2016–2023)