E04.1 — Nontoxic single thyroid nodule
E04.1 is a billable, specific ICD-10-CM code for nontoxic single thyroid nodule. It is valid for submission on a claim.
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Colloid nodule (cystic) (thyroid)
- Nontoxic uninodular goiter
- Thyroid (cystic) nodule NOS
Risk adjustment
E04.1 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
E04.1 is named in 12 Medicare coverage policies — 12 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A52986Billing and Coding: Biomarkers for Oncology
- A56580Billing and Coding: Computerized Axial Tomography (CT), Thorax
- A56729Billing and Coding: Magnetic Resonance Imaging of the Head and Neck
- A57029Billing and Coding: Ultrasound, Soft Tissues of Head and Neck
How E04.1 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 E04.1.
- Colloid nodule(of thyroid) (cystic)
- Cyst›thyroid(gland)
- Goiter›uninodular(nontoxic)
- Nodule, nodular›colloid, thyroid(cystic)
- Nodule, nodular›thyroid(cold) (gland) (nontoxic)
- Thyroid›nodule(cystic) (nontoxic) (single)
- Goiter›nontoxic›uninodular
- Struma›nodosa›uninodular
Related codes at this level
Codes that share E04. If E04.1 is not quite right, the correct code is usually one of these.
Questions about E04.1
- Is E04.1 a billable ICD-10-CM code?
- Yes. E04.1 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does E04.1 sit in the tabular list?
- Endocrine, nutritional and metabolic diseases (E00-E89), in the block Disorders of thyroid gland (E00-E07).