Skip to content
Dx

ICD-10-CM 2027 diagnosis code

E06.2Chronic thyroiditis with transient thyrotoxicosis

✓ Billable / specific

E06.2 is a valid, billable ICD-10-CM code for chronic thyroiditis with transient thyrotoxicosis. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About E06.2

E06.2 is the ICD-10-CM diagnosis code for chronic thyroiditis with transient thyrotoxicosis. It belongs to category E06 (thyroiditis), block E00-E07 (disorders of thyroid gland) and chapter 4 (endocrine, nutritional and metabolic diseases). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within E06 (thyroiditis), E06.2 is specifically for chronic thyroiditis with transient thyrotoxicosis. Related codes cover acute thyroiditis (E06.0), subacute thyroiditis (E06.1), autoimmune thyroiditis (E06.3), drug-induced thyroiditis (E06.4), other chronic thyroiditis (E06.5) and unspecified (E06.9).

Don't report E06.2 together with the conditions in its Excludes1 note: autoimmune thyroiditis (E06.3).

It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.

In MS-DRG v44.0, it is part of the grouping logic for DRG 011 (Tracheostomy for Face, Mouth and Neck Diagnoses or Laryngectomy with MCC, relative weight 5.6154), DRG 012 (Tracheostomy for Face, Mouth and Neck Diagnoses or Laryngectomy with CC, relative weight 4.381), DRG 013 (Tracheostomy for Face, Mouth and Neck Diagnoses or Laryngectomy without CC/MCC, relative weight 2.7307), DRG 643 (Endocrine Disorders with MCC, relative weight 1.6139), DRG 644 (Endocrine Disorders with CC, relative weight 1.0044) and DRG 645 (Endocrine Disorders without CC/MCC, relative weight 0.7459), in Pre-MDC and MDC 10 (Endocrine, Nutritional and Metabolic Diseases and Disorders), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as 245.8 (other and unspecified chronic thyroiditis).

Coding notes

Excludes1Not coded here — never report together with this code
  • autoimmune thyroiditis (E06.3)

Notes that apply from higher levels

Instructions written at a parent level also apply to E06.2.

› From E06 Thyroiditis
Excludes1
  • postpartum thyroiditis (O90.5)

Broader instructions also apply from Chapter 4: Endocrine, nutritional and metabolic diseases.

Alphabetic index entries

2 entries

Terms in the official ICD-10-CM index that lead to E06.2.

Codes whose notes reference E06.2

MS-DRG v44.0 grouping

All DRGs →

Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.

ICD-9-CM equivalent

Converter →
  • 245.8Other and unspecified chronic thyroiditisapproximate

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about E06.2

Is E06.2 billable?

Yes. E06.2 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can E06.2 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict E06.2 as a principal diagnosis.

Is E06.2 a CC or MCC?

No. E06.2 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does E06.2 group to?

E06.2 is used in the MS-DRG v44.0 logic for MS-DRG 011 (Tracheostomy for Face, Mouth and Neck Diagnoses or Laryngectomy with MCC), MS-DRG 012 (Tracheostomy for Face, Mouth and Neck Diagnoses or Laryngectomy with CC), MS-DRG 013 (Tracheostomy for Face, Mouth and Neck Diagnoses or Laryngectomy without CC/MCC), MS-DRG 643 (Endocrine Disorders with MCC), MS-DRG 644 (Endocrine Disorders with CC) and MS-DRG 645 (Endocrine Disorders without CC/MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.

What is the ICD-9 code for E06.2?

The CMS General Equivalence Mappings map E06.2 to ICD-9-CM 245.8.