In simple words: This code indicates a general form of malnutrition where a person isn't getting enough protein and calories. It's used when the doctor doesn't know the exact cause or type of malnutrition.

Unspecified protein-calorie malnutrition (PCM) is a condition characterized by inadequate intake of protein and calories.It manifests with symptoms such as muscle wasting, loss of subcutaneous fat, and weight loss.This code is used when the underlying cause or specific type of PCM (e.g., Kwashiorkor, Marasmus) is not documented.

Example 1: A 70-year-old patient presents with unintentional weight loss, muscle wasting, and decreased appetite.After initial assessment, the physician determines the patient has protein-calorie malnutrition but needs further investigation to identify the underlying cause. E46 is used until a more definitive diagnosis can be made., A child in a developing country presents with edema, a distended abdomen, and skin lesions.The clinical picture suggests protein-calorie malnutrition, but further tests are needed to distinguish between Kwashiorkor and Marasmus.E46 is used initially., A patient with advanced cancer experiences severe weight loss and muscle wasting due to the disease process and side effects of treatment. E46 is used as a secondary code to the cancer diagnosis to specify the presence of protein-calorie malnutrition.

Documentation should include clinical findings such as weight loss, muscle wasting, body mass index (BMI), and dietary history. Any laboratory test results, such as albumin or prealbumin levels, should also be documented.If known, any contributing factors or suspected underlying causes should also be noted.