Accurate Morbid Obesity ICD 10 Codes ensure proper medical billing, compliance, and patient care. Morbid Obesity ICD-10 Codes: E66.01, E66.9, E66.2 & BMI Guidelines
Understand the 2025 ICD-10-CM diagnosis code system for morbid obesity with precise body mass index (BMI) classifications.
Use billable specific ICD-10-CM code E66.01 for diagnosis for reimbursement purposes and ensure proper documentation, especially effective on October 1, 2024, for updates to the American ICD-10-CM version.
Know when to apply context annotation back references, annotation back references refer, and understand how references refer to codes in the international versions of ICD-10. Pediatric cases must consider BMI pediatric norms and percentiles for age, using the 95th percentile as a key threshold.
E66.9 – Obesity, Unspecified
E66.01 – Morbid (Severe) Obesity Due to Excess Calories
E66.2 – Morbid Obesity with Alveolar Hypoventilation
E66.3 – Overweight
Code | Description | BMI Range |
E66.01 | Class 3 (Morbid) Obesity | ≥40 |
Z68.43 | BMI 50-59.9 (Super Morbid Obesity) | 50.0-59.9 |
E66.8 | Other Obesity (Class 1/2) | 30-39.9 |
Z68.41 | BMI 35-39.9 (Class 2) | 35.0-39.9 |
Z68.3 | BMI 30-34.9 (Class 1) | 30.0-34.9 |
Psychological Factors (F55.8)
Maternal Morbid Obesity (O99.214)
Immunodeficiency Due to Obesity (D84.81)
History of Morbid Obesity (Z86.39)
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ICD-10 code E66.01 for morbid weight problems is a critical tool for healthcare providers to diagnose and manage this extreme circumstance. By knowing what morbid weight problems are, the applicable ICD-10 codes, BMI prognosis codes, and the complications related to weight problems, carriers can make sure that sufferers acquire first-class feasible care.
Proper coding and documentation are also crucial for correct repayment, making it vital for carriers to stay knowledgeable about state-of-the-art coding recommendations and payer rules.
E66.01 (morbid obesity) + Z68.4x (specific BMI).
Use E66.01 + R93.89 (abdominal fat localization).
Yes, but payer-specific (morbid obesity ICD-10 billable codes).
Obesity is categorized into four primary types based on cause and distribution:
Based on BMI severity:
Morbid obesity (Class 3) is defined as:
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