What is the ICD-10 code for morbid obesity?

The ICD-10 code for morbid obesity due to excess calories is E66.01. It requires documentation of 'morbid obesity' and a BMI of 40 or higher, or 35 with comorbidities.

How do you code morbid obesity with hypoventilation?

For morbid obesity with alveolar hypoventilation, use ICD-10 code E66.2. Ensure documentation supports both obesity and hypoventilation.

ICD-10 Coding for Morbid Obesity(E66.01, E66.0, E66.09)

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Explore ICD-10 coding for morbid obesity, including E66.01 and E66.2. Learn about documentation requirements, coding pitfalls, and billing considerations.

Also known as:

Severe ObesityExtreme Obesityobesity class iii

Related ICD-10 Code Ranges

Complete code families applicable to Morbid Obesity

E00-E89Primary Range

Endocrine, nutritional and metabolic diseases

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Code Comparison: When to Use Each Code

Compare key differences between these codes to ensure accurate selection

Code	Description	When to Use	Key Documentation
E66.01	Morbid (severe) obesity due to excess calories	Use when the provider documents 'morbid obesity' and the patient has a BMI ≥40 or BMI ≥35 with comorbid conditions.	BMI ≥40 or BMI ≥35 with comorbidities Provider documentation of 'morbid obesity'
E66.2	Morbid obesity with alveolar hypoventilation	Use when morbid obesity is complicated by alveolar hypoventilation.	Daytime hypercapnia (PaCO2 ≥45 mmHg) with BMI ≥30

Primary ICD-10-CM Codes

Morbid (severe) obesity due to excess calories

E66.01Billable

Differential Codes

Alternative codes to consider when ruling out similar conditions

Other obesity due to excess caloriesE66.09

Obstructive sleep apnea (adult) (pediatric)G47.33

Documentation & Coding Risks

Avoid these common issues when documenting Morbid Obesity.

Documenting only BMI without a diagnosis

Impact

Clinical: May lead to under-treatment of obesity-related conditions., Regulatory: Non-compliance with coding guidelines., Financial: Potential loss of reimbursement due to incorrect coding.

Mitigation

Educate providers on the importance of documenting diagnoses., Implement EHR prompts for obesity diagnosis when BMI is high.

Coding BMI as a primary diagnosis

Impact

Reimbursement: Incorrect DRG assignment leading to potential underpayment., Compliance: Non-compliance with ICD-10 coding guidelines., Data Quality: Inaccurate clinical data representation.

Mitigation

Always use an obesity code (E66.xx) as the primary diagnosis.

Inconsistent BMI and diagnosis documentation

Impact

Discrepancies between documented BMI and diagnosis of obesity.

Mitigation

Ensure provider documentation aligns with BMI and diagnosis.

Frequently Asked Questions

Documentation requirements, coding pitfalls and FAQs for conditions coded with E66.01.

Primary Code

E66.01

Morbid (severe) obesity due to excess calories

Quick Navigation

ICD-10 codes9

Coding risks3

FAQs2

ICD-10 Coding for Morbid Obesity(E66.01, E66.0, E66.09)

Documentation & Coding Risks

Frequently Asked Questions

What is the ICD-10 code for morbid obesity?

How do you code morbid obesity with hypoventilation?

Related condition guides