E06.5 — Other chronic thyroiditis
E06.5 is a billable, specific ICD-10-CM code for other chronic thyroiditis. It is valid for submission on a claim.
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Chronic fibrous thyroiditis
- Chronic thyroiditis NOS
- Ligneous thyroiditis
- Riedel thyroiditis
Risk adjustment
E06.5 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Medicare coverage
E06.5 is named in 2 Medicare coverage policies — 2 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A57204Billing and Coding: MRI and CT Scans of the Head and Neck
- A57657Billing and Coding: Sedimentation Rate, Erythrocyte
How E06.5 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to E06.5.
- Ligneous thyroiditis
- Riedel's›struma, thyroiditis or disease
- Struma›Riedel's
- Thyroiditis›chronic(nonspecific) (sclerosing)
- Thyroiditis›fibrous(chronic)
- Thyroiditis›ligneous
- Thyroiditis›Riedel's
- Thyroiditis›woody
- Thyroiditis›chronic›fibrous
Related codes at this level
Codes that share E06. If E06.5 is not quite right, the correct code is usually one of these.
Questions about E06.5
- Is E06.5 a billable ICD-10-CM code?
- Yes. E06.5 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does E06.5 sit in the tabular list?
- Endocrine, nutritional and metabolic diseases (E00-E89), in the block Disorders of thyroid gland (E00-E07).