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  5. Symptoms and signs concerning food and fluid intake (R63)

Symptoms and signs concerning food and fluid intake (R63)

The ICD-10 code R63 covers symptoms and signs related to food and fluid intake, including distinct conditions such as anorexia (R63.0), polydipsia (R63.1), and polyphagia (R63.2), each identifying specific abnormal eating or drinking behaviors. These codes help accurately describe a patient’s appetite, feeding patterns, and fluid consumption issues.

The ICD-10 code for anorexia (R63.0) captures loss of appetite or decreased interest in food, sometimes referred to as “loss of appetite” or “no interest in food.” Meanwhile, R63.1 identifies polydipsia, characterized by excessive thirst and increased fluid intake. For increased appetite or overeating, the code R63.2 applies, encompassing terms like “excessive appetite” and “overeating.” Feeding difficulties, coded under R63.3, include various challenges in eating and feeding, with subcodes differentiating pediatric acute or chronic feeding disorders and other feeding problems such as difficulty chewing or holding food in the mouth. Codes R63.4 and R63.5 document abnormal weight changes, including unintentional weight loss or gain, while R63.6 specifically addresses underweight conditions, often linked with anorexia nervosa. R63.8 covers a wide range of other less specified issues involving abnormal eating and drinking behaviors, like refusal to eat, abnormal appetite changes, or inadequate fluid intake. These codes assist medical professionals in documenting precise nutritional and intake-related symptoms to guide patient care and billing.

Instructional Notations

Type 1 Excludes

A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.

Clinical Terms

The following clinical terms provide additional context, helping users better understand the clinical background and common associations for each diagnosis listed in this section. Including related terms alongside ICD-10-CM codes supports coders, billers, and healthcare professionals in improving accuracy, enhancing documentation, and facilitating research or patient education.

Anorexia

The lack or loss of APPETITE accompanied by an aversion to food and the inability to eat. It is the defining characteristic of the disorder ANOREXIA NERVOSA.

Anorexia Nervosa

An eating disorder that is characterized by the lack or loss of APPETITE, known as ANOREXIA. Other features include excess fear of becoming OVERWEIGHT; BODY IMAGE disturbance; significant WEIGHT LOSS; refusal to maintain minimal normal weight; and AMENORRHEA. This disorder occurs most frequently in adolescent females. (APA, Thesaurus of Psychological Index Terms, 1994)

Anti-Obesity Agents

Agents that increase energy expenditure and weight loss by neural and metabolic regulation.

Body Weight

The mass or quantity of heaviness of an individual. It is expressed by units of pounds or kilograms.

Body-Weight Trajectory

A general pattern of body weight gain or loss over many years. Weight change trajectory is influenced by several determinants in children and adults.

Diet, Reducing

A diet designed to cause an individual to lose weight.

Fasting

Abstaining from FOOD.

Food

Substances taken in by the body to provide nourishment.

Hypoglycemia

A syndrome of abnormally low BLOOD GLUCOSE level. Clinical hypoglycemia has diverse etiologies. Severe hypoglycemia eventually lead to glucose deprivation of the CENTRAL NERVOUS SYSTEM resulting in HUNGER; SWEATING; PARESTHESIA; impaired mental function; SEIZURES; COMA; and even DEATH.

Intermittent Fasting

Alternating between fasting for an extended period of time during the day and eating during a restricted time for the day.

Polydipsia

Excessive thirst manifested by excessive fluid intake. It is characteristic of many diseases such as DIABETES MELLITUS; DIABETES INSIPIDUS; and NEPHROGENIC DIABETES INSIPIDUS. The condition may be psychogenic in origin.

Polydipsia, Psychogenic

A clinical disorder characterized by excessive fluid intake (polydipsia); HYPONATREMIA; and POLYURIA in SCHIZOPHRENIA and other psychiatric disorders. Impaired water metabolism in psychogenic polydipsia can result in WATER INTOXICATION.

Weight Loss

Decrease in existing BODY WEIGHT.

Weight Reduction Programs

Services providing counseling and activities that help overweight individuals to attain a more healthy body weight.