E66.9 ICD-10-CM Code: Obesity, unspecified
A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.
Official description
E66.9Obesity, unspecified
ICD-10-CM diagnosis code · United States clinical modification
Where E66.9 sits
- 1
Chapter 4
Endocrine, nutritional and metabolic diseases (E00-E89)
- 2
Section
Overweight, obesity and other hyperalimentation (E65-E68)
- 3
Category E66
Overweight and obesity
- 4
Code E66.9
Obesity, unspecified
Notes for this code
Inclusion terms
- Obesity NOS
Code first
No “code first” instruction is listed for E66.9.
Use additional code
No “use additional code” instruction is listed for E66.9.
Excludes1
Conditions that should not be reported together with this code.
No Excludes1 note is listed for E66.9.
Excludes2
Conditions not included here that may be reported separately when present.
No Excludes2 note is listed for E66.9.
Source and release
- Data release
- U.S. ICD-10-CM · FY 2027
- Effective date
- Oct 1, 2026
- Publisher
- Vero Scribe Inc.
This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.
Frequently asked questions
What does ICD-10-CM code E66.9 mean?
E66.9 is the FY 2027 U.S. ICD-10-CM code for “Obesity, unspecified.”
Is E66.9 a billable or specific ICD-10-CM code?
Yes. In the FY 2027 reference data used on this page, E66.9 has no child codes and is presented as a billable/specific code. Always confirm the active code set and payer requirements before use.
Where is E66.9 located in ICD-10-CM?
E66.9 is listed in Chapter 4, Endocrine, nutritional and metabolic diseases (E00-E89), within Overweight, obesity and other hyperalimentation (E65-E68) (E65–E68), under category E66, Overweight and obesity.
What coding notes are listed for E66.9?
Its listed inclusion terms are Obesity NOS. No code-first instruction is listed. No Excludes1 note is listed. No Excludes2 note is listed.