E06 vs O90.5
E06 (Thyroiditis) compared with O90.5 (Postpartum thyroiditis), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.
Can these codes be reported together?
No — do not report together. E06 carries an Excludes1 note covering O90.5: “postpartum thyroiditis (O90.5)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
Side by side
| E06Thyroiditis | O90.5Postpartum thyroiditis | |
|---|---|---|
| Billing status | Non-billable header | Billable |
| Classification | E00-E89 — Endocrine, Nutritional and Metabolic Diseases (E00-E89) | O00-O9A — Pregnancy, Childbirth and the Puerperium (O00-O9A) |
| Definition | Thyroiditis is a non-billable ICD-10-CM category code (E06). | Postpartum thyroiditis is a billable ICD-10-CM diagnosis code (O90.5). |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources