Is E66.1 a billable ICD-10-CM code?

Yes. E66.1 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does E66.1 sit in the tabular list?

Endocrine, nutritional and metabolic diseases (E00-E89), in the block Overweight, obesity and other hyperalimentation (E65-E68).

E66.1

E66.1 — Drug-induced obesity

Billable / specific codeICD-10-CM

E66.1 is a billable, specific ICD-10-CM code for drug-induced obesity. It is valid for submission on a claim.

Use additional code

Add a secondary code to capture the detail described below.

code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)

Risk adjustment

E66.1 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

E66.1 is named in 3 Medicare coverage policies — 3 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

A57065Billing and Coding: Outpatient Psychiatry and Psychology Services
A57179Billing and Coding: Transesophageal Echocardiogram
A57736Billing and Coding: Vitamin D Assay Testing

How E66.1 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 E66.1.

Obesity›drug-induced
Obesity›due to›drug

Related codes at this level

Codes that share E66. If E66.1 is not quite right, the correct code is usually one of these.

Questions about E66.1

Is E66.1 a billable ICD-10-CM code?: Yes. E66.1 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does E66.1 sit in the tabular list?: Endocrine, nutritional and metabolic diseases (E00-E89), in the block Overweight, obesity and other hyperalimentation (E65-E68).