What is this code?
ICD-10 entries help standardize how diagnoses are organized for coding, reporting, analytics, and documentation. This code sits within the broader ICD-10 area for Endocrine, nutritional and metabolic diseases (E00-E89).
When is it used?
- May be used when a clinician documents other obesity in a patient's medical record.
- May appear in hospital records, claims, referrals, and clinical documentation.
- This code may act more like a grouping or parent code, so a more specific child code may be used in final documentation when available.
What it does not mean
- A code alone does not explain severity, treatment plan, or outcome.
- A medical code should not be treated as a substitute for a doctor's diagnosis or advice.
- This entry may represent a broader category rather than the most specific billable code.
Code hierarchy
chapter
4Endocrine, nutritional and metabolic diseases (E00-E89)
block
E65-E68Overweight, obesity and other hyperalimentation
category
E66Overweight and obesity
currentE66
Where you may see this code
You may see this entry in coding references, medical records, or claims workflows when a broader diagnosis category is being reviewed before a more specific code is chosen.
Related specialists
EndocrinologistGeneral Physician
Related codes
Sibling codes
Mapped diagnoses and classifications
SNOMED_CT 238132000high
Android obesity
Source: SNOMED International ICD-10 map
SNOMED_CT 408512008high
Body mass index 40+ - severely obese
Source: SNOMED International ICD-10 map
SNOMED_CT 248311001high
Central obesity
Source: SNOMED International ICD-10 map
SNOMED_CT 1359761000high
Common polygenetic childhood obesity
Source: SNOMED International ICD-10 map
SNOMED_CT 700150001high
Congenital leptin deficiency
Source: SNOMED International ICD-10 map
SNOMED_CT 292464007high
Constitutional obesity
Source: SNOMED International ICD-10 map
Coding guidelines
Compatibility
Legacy code aligns to an official FY 2026 category. Frontend should resolve to the official category page and surface the billable child codes.
Legacy codes
E66.8
Replacement codes
E66.89 — Other obesity not elsewhere classified
Common synonyms
Other obesity
Frequently asked questions
About this content
This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.