Is E05.20 a billable ICD-10-CM code?

Yes. E05.20 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does E05.20 sit in the tabular list?

Endocrine, nutritional and metabolic diseases (E00-E89), in the block Disorders of thyroid gland (E00-E07).

What cannot be coded together with E05.20?

E05.20 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above E05.20 (E05) and apply to it just the same.

E05.20

E05.20 — Thyrotoxicosis with toxic multinodular goiter without thyrotoxic crisis or storm

Billable / specific codeICD-10-CM

E05.20 is a billable, specific ICD-10-CM code for thyrotoxicosis with toxic multinodular goiter without thyrotoxic crisis or storm. It is valid for submission on a claim.

Excludes1 inherited from the categories above E05.20

These are not written on E05.20, but they bind it: a note on a category applies to every code beneath it. Billing E05.20 with anything listed here is a denial.

Written on E05 — Thyrotoxicosis [hyperthyroidism]

chronic thyroiditis with transient thyrotoxicosis (E06.2)
neonatal thyrotoxicosis (P72.1)

Risk adjustment

E05.20 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

E05.20 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 E05.20 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 E05.20.

Plummer's disease
Goiter›multinodular›toxic or with hyperthyroidism
Goiter›nodular›toxic
Nodule, nodular›thyroid›toxic or with hyperthyroidism
Nodule, nodular›thyroid›with thyrotoxicosis
Struma›nodosa›toxic or with hyperthyroidism
Struma›nodosa›toxicosa
Goiter›nodular›with›hyperthyroidism
Goiter›nodular›with›thyrotoxicosis
Hyperthyroidism›with›goiter›nodular(multinodular)
Struma›nodosa›toxic or with hyperthyroidism›multinodular
Struma›nodosa›toxicosa›multinodular

Code history

E05.20 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.

Related codes at this level

Codes that share E05.2. If E05.20 is not quite right, the correct code is usually one of these.

E05.21Thyrotoxicosis with toxic multinodular goiter with thyrotoxic crisis or storm

Questions about E05.20

Is E05.20 a billable ICD-10-CM code?: Yes. E05.20 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does E05.20 sit in the tabular list?: Endocrine, nutritional and metabolic diseases (E00-E89), in the block Disorders of thyroid gland (E00-E07).
What cannot be coded together with E05.20?: E05.20 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above E05.20 (E05) and apply to it just the same.