ICD-10 codes for obesity
Obesity coding requires both the clinical diagnosis and, when documented, the BMI category. E66.- codes describe obesity; Z68.- codes describe body mass index and are commonly added when BMI is recorded.
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1
Paste or dictate a de-identified clinical note — a few sentences is enough.
2
Press Get codes. The coding system is fixed on this page.
3
Review each suggested code and its evidence, then copy the codes you agree with.
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Extracted codes
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Paste a clinical note or load an example, then press Get codes. Suggestions appear here with the supporting evidence.
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Obesity ICD-10 codes
Start with the primary code, then move to a more specific related code when the documentation supports it.
| Code | Description | System |
|---|---|---|
E66.9 | Obesity, unspecified | ICD-10-CM |
E66.01 | Morbid (severe) obesity due to excess calories | ICD-10-CM |
E66.3 | Overweight | ICD-10-CM |
Z68.30 | Body mass index 30.0-30.9, adult | ICD-10-CM |
Z68.41 | Body mass index 40.0-44.9, adult | ICD-10-CM |
Z71.3 | Dietary counseling and surveillance | ICD-10-CM |
How to choose the right code
Code the documented weight diagnosis first: overweight, obesity, or severe obesity. Add the specific BMI Z68.- code when BMI is documented and payer rules allow it. Do not code BMI alone without the associated clinical diagnosis.
Documentation example
“Weight-management visit. BMI 42.1 with hypertension and knee pain limiting exercise. Assessment: severe obesity due to excess calories. Discussed nutrition plan, GLP-1 eligibility, and referral to dietitian.”
Suggested:
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AI suggestions are not a substitute for clinician judgment, payer rules, local coding policy, or the official code set.
FAQ
Can I code BMI without obesity?
BMI Z68.- codes are secondary context codes and generally require the associated weight diagnosis to be documented.
When is E66.01 appropriate?
Use E66.01 when severe or morbid obesity due to excess calories is documented, often with BMI 40 or higher depending on clinical and payer context.
Can AI extract BMI and counseling facts?
Notat extracts BMI, obesity diagnosis, comorbidities, and counseling decisions as clinical facts, then suggests diagnosis and BMI codes with supporting evidence.
Related ICD-10 guides
Keep moving through the condition hub, or open the general medical coding guide for more coding systems and extractors.