Symptoms and signs concerning food and fluid intake (R63) ICD-10-CM
The R63 code range covers symptoms and signs concerning food and fluid intake with 13 ICD-10-CM diagnosis codes. 11 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
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.
- bulimia NOS F50.2
Codes in the R63 Range 13 codes · 11 billable
- R63 Symptoms and signs concerning food and fluid intakeNon-billable
- R63.0 Anorexia
- R63.1 Polydipsia
- R63.2 Polyphagia
- R63.3 Feeding difficultiesNon-billable
- R63.30 Feeding difficulties, unspecified
- R63.31 Pediatric feeding disorder, acute
- R63.32 Pediatric feeding disorder, chronic
- R63.39 Other feeding difficulties
- R63.4 Abnormal weight loss
- R63.5 Abnormal weight gain
- R63.6 Underweight
- R63.8 Other symptoms and signs concerning food and fluid intake
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the R63 range.
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)
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.
About the R63 Code Range
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.
Questions About This Page
How many billable codes are in the R63 range?
Of the 13 codes in this range, 11 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.
What does the R63 range classify?
The range classifies symptoms and signs concerning food and fluid intake. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
