2026 ICD-10-CM Diagnosis Code R63.8Other symptoms and signs concerning food and fluid intake
ICD-10-CM Codes›R00–R99›R50-R69›R63
- Billable — Valid for Submission
- Not Chronic
R63.8 is a billable ICD-10-CM diagnosis code for other symptoms and signs concerning food and fluid intake. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 640 through 641. As a symptom code, it should not be used as a principal diagnosis once a related definitive diagnosis has been established. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other general signs and symptoms.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Abnormal eating pattern
- Abnormal food appetite
- Adipsia
- Alteration in nutrition
- Alteration in nutrition: less than body requirements
- Alteration in nutrition: more than body requirements
- Altered appetite
- Always eating
- Always hungry
- Appetite problem
- Aversion to food or drink
- Aversion to particular drink
- Aversion to particular food
- Cannot face food
- Carbohydrate craving
- Chaotic eating
- Chewing finding
- Comfort eating
- Craving for food or drink
- Craving for particular drink
- Craving for particular food
- Dependent for drinking
- Diet followed - finding
- Difficulty drinking
- Difficulty drinking from feeder cup
- Difficulty drinking using a straw
- Difficulty holding drinks
- Difficulty sipping drink
- Difficulty spitting
- Difficulty taking drink to mouth
- Does not chew
- Does not drink
- Does not drink from a bottle
- Does not drink from feeder cup
- Does not drink using a straw
- Does not eat
- Does not eat certain food
- Does not hold drinks
- Does not move food in mouth
- Does not retrieve food from buccal sulcus
- Does not sip drink
- Does not spit
- Does not take drink to mouth
- Drink intake - finding
- Eating frequently
- Eating problem
- Eats irregularly
- Excessive beta glucan intake
- Excessive bioactive substance intake
- Excessive caffeine intake
- Excessive chloride salt intake
- Excessive coffee drinker
- Excessive fluid intake
- Excessive intake of high intensity sweetener additive
- Excessive non-nutritive food additive intake
- Excessive sulfate salt intake
- Failure to lose weight
- Fasting
- Finding of feeding pattern
- Finding of fluid intake
- Finding of frequency of eating
- Finding of pattern of fluid intake
- Finding of quantity of appetite
- Finding of quantity of eating
- Finding of regularity of eating
- Finding related to ability to chew
- Finding related to ability to drink from bottle
- Finding related to ability to drink from feeder cup
- Finding related to ability to drink using straw
- Finding related to ability to eat certain food
- Finding related to ability to hold drinks
- Finding related to ability to retrieve food from buccal sulcus
- Finding related to ability to sip drink
- Finding related to ability to spit
- Finding related to ability to take drink to mouth
- Hungry
- Hypometabolism
- Improper feeding schedule for age
- Inadequate chloride salt intake
- Inadequate food diet
- Inadequate oral food intake for physiological needs
- Inadequate sulfate salt intake
- Increased appetite
- Increased fluid intake
- Insufficient fluid intake - finding
- Insufficient intake of food and water with self neglect
- Intake of unsafe food
- Intentional weight loss
- Limited food acceptance
- Little thirst
- Morbid hunger
- Never thirsty
- Not taking fluids
- Not tolerating normal diet
- Not tolerating oral fluid
- Nutritional deficiency state
- On special diet
- Poor response to enteral nutrition
- Predicted excessive energy intake
- Predicted inadequate energy intake
- Preoccupation with food
- Problem with drinking fluid
- Reduced fluid intake
- Reduced fluid intake pre-bedtime
- Reduced thirst
- Refusal to eat in presence of others
- Refusing fluids
- Refusing food
- Refusing lumpy foods
- Refusing solids
- Self-neglect
- Tachyphagia
- Unable to drink
- Unable to drink from a bottle
- Unable to drink from a feeder cup
- Unable to drink using a straw
- Unable to eat
- Unable to eat certain food
- Unable to hold drinks
- Unable to sip drink
- Unable to spit
- Unable to take drink to mouth
- Weight decreased
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
- Hypometabolism - R63.8
- abnormal, in development - R63.8
- Symptoms NEC - R68.89
- development NEC - R63.8
- food and fluid intake - R63.8
- metabolism NEC - R63.8
External Cause of Injuries IndexGuidance
References for this code in the External Cause of Injuries Index.
- Hypometabolism
- Increase, increased
- abnormal, in development
- Symptoms NEC
- development NEC
- Symptoms NEC
- involving
- food and fluid intake
- Symptoms NEC
- metabolism NEC
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Fasting
abstaining from food.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.Food
substances taken in by the body to provide nourishment.
Convert R63.8 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About R63.8Overview
Is R63.8 (Symptoms and signs concerning food and fluid intake) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report other symptoms and signs concerning food and fluid intake on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does R63.8 group to?
When other symptoms and signs concerning food and fluid intake is the principal diagnosis on an inpatient stay, it groups to MS-DRG 640, 641, with relative weights from 0.7782 to 1.3356 depending on complications. Higher weights mean higher Medicare reimbursement.
Can R63.8 be a principal diagnosis?
Use it with care. This is a symptom code, so once a definitive diagnosis explaining the other symptoms and signs concerning food and fluid intake is established, that condition takes the principal position instead.
What is the ICD-9 equivalent of R63.8?
Under the General Equivalence Mappings, other symptoms and signs concerning food and fluid intake converts to ICD-9-CM 783.9 (nutr/metab/devel sym NEC). The mapping is approximate, so confirm the match fits the documentation.
Footnotes
[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.
