11/22/2025
For medical coding purposes, ICD-10 code R63.2 is for polyphagia, or excessive eating. It is classified under "Symptoms and signs concerning food and fluid intake".
Key coding information
Description: Polyphagia is a medical term for excessive or extreme hunger and increased appetite, often leading to overeating.
Code category: It is in Chapter 18 of the ICD-10-CM, which covers "Symptoms, signs, and abnormal clinical and laboratory findings, not elsewhere classified" (R00-R99).
As a symptom code: R63.2 is a symptom code, not a definitive diagnosis. It should be used when the underlying cause of the overeating is unknown. If the cause is identified (e.g., diabetes or an eating disorder), that condition should be coded instead.
Excludes notes: ICD-10 specifies that R63.2 should not be coded with certain other conditions, such as:
Eating disorders (F50.-)
Bulimia nervosa (F50.2)
Code also: Coders should consider coding for associated conditions if applicable, such as genetic susceptibility to obesity (Z15.2) or obesity due to a specific genetic pathway disruption (E88.82).
Example coding scenario
Patient presents with symptoms of polyphagia. The physician has not yet determined the underlying cause, but notes the patient's complaint of excessive, uncontrollable hunger.
Initial visit: For the initial visit, the coder would use R63.2 as the primary diagnosis to report the patient's symptom.
Follow-up visit: After further testing, the physician diagnoses the patient with Type 1 diabetes. In this case, the coder would now use the specific code for Type 1 diabetes and no longer use the symptom code R63.2.