Morbid (severe) obesity due to excess calories

This diagnosis code signifies a severe form of obesity resulting from an excessive caloric intake. It describes a patient whose body mass index (BMI) is typically 40 kg/m² or higher, or 35 kg/m² or higher with significant obesity-related comorbidities, directly attributed to consuming more calories than expended.

Use this code when documentation clearly states "morbid obesity due to excess calories" or "severe obesity due to excess calories." It is appropriate for patients undergoing bariatric surgery evaluations, weight management programs, or when obesity is a significant factor in other medical conditions, and the etiology is specified as caloric excess.

• Ensure the physician's documentation explicitly links the morbid/severe obesity to excess caloric intake.
• Do not code this with E66.2 (morbid obesity with alveolar hypoventilation), as per the Excludes1 note.
• Always sequence this code as a secondary diagnosis when another condition is the primary reason for the encounter, unless the obesity itself is the primary focus of treatment.