E66.1

Billable

ChapterE00–E89

Ranksubcategory

Official Description

Drug-induced obesity

Metadata & Insights

•2026 ICD-10-CM Edition - Effective October 1, 2025.
•Billable/specific code (valid for reimbursement).
•Chapter 4: Endocrine, Nutritional and Metabolic Diseases (E00-E89).

Instructional Notes

Use Additional Code

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

General instructions are available for the parent sections:

View CH4 Notes View E66 Notes

Clinical Hierarchy

CH4Endocrine, nutritional and metabolic diseases (E00-E89)

E65-E68Overweight, obesity and other hyperalimentation (E65-E68)

E66Overweight and obesity

E66.1Drug-induced obesity

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to E66.1:

categoryE66

Overweight and obesity

View context instructions

chapterCH4

Endocrine, nutritional and metabolic diseases (E00-E89)

View context instructions

Alphabetic Index Mentions

These are Diagnosis Index lookup paths that route to E66.1. Use them as entry terms for search, then confirm final coding instructions in the Tabular List and notes above.

2 raw paths

Obesity2 unique routes

drug-induced→E66.1

due to

drug→E66.1

MS-DRG Classification

2026 v43.1

This code is grouped within the following Diagnosis Related Group(s) for clinical reimbursement:

DRG 640

Miscellaneous Disorders of Nutrition, Metabolism, Fluids and Electrolytes with MCC

DRG 641

Miscellaneous Disorders of Nutrition, Metabolism, Fluids and Electrolytes without MCC

Cross Reference

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