E05.31 — Thyrotoxicosis from ectopic thyroid tissue with thyrotoxic crisis or storm
E05.31 is a billable, specific ICD-10-CM code for thyrotoxicosis from ectopic thyroid tissue with thyrotoxic crisis or storm. It is valid for submission on a claim.
Risk adjustment
E05.31 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
E05.31 is named in 8 Medicare coverage policies — 8 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A56580Billing and Coding: Computerized Axial Tomography (CT), Thorax
- A57029Billing and Coding: Ultrasound, Soft Tissues of Head and Neck
- A57204Billing and Coding: MRI and CT Scans of the Head and Neck
- A57326Billing and Coding: Electrocardiograms
How E05.31 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 E05.31.
- Hyperthyroidism›due to ectopic thyroid tissue›with thyroid storm
- Thyrotoxicosis›due to›ectopic thyroid nodule or tissue›with thyroid storm
Related codes at this level
Codes that share E05.3. If E05.31 is not quite right, the correct code is usually one of these.
Questions about E05.31
- Is E05.31 a billable ICD-10-CM code?
- Yes. E05.31 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does E05.31 sit in the tabular list?
- Endocrine, nutritional and metabolic diseases (E00-E89), in the block Disorders of thyroid gland (E00-E07).