2027 ICD-10-CM Diagnosis Code R63.8Other symptoms and signs concerning food and fluid intake

ICD-10-CM Codes›R00–R99›R50-R69›R63

ICD-10-CM R63.8
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

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 2027 (October 1, 2026 through September 30, 2027) 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

ICD-10-CM Code
R63.8
Billable Status
Yes — Valid for Submission
Code Describes
Other symptoms and signs concerning food and fluid intake
Short Description
Other symptoms and signs concerning food and fluid intake
Same as the full description in the CMS dataset.
Parent Code
R63
Symptoms and signs concerning food and fluid intake

Code Classification

ChapterR00–R99Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
SectionR50-R69General symptoms and signs
CategoryR63Symptoms and signs concerning food and fluid intake
This CodeR63.8Other symptoms and signs concerning food and fluid intake

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 carbohydrate
  • Excessive intake of high intensity sweetener additive
  • Excessive non-nutritive food additive intake
  • Excessive oxalate intake
  • Excessive phytate acid 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

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to R63.8: its own notes plus those printed at R63 and Chapter 18. A note printed at a category, block or chapter applies to every code under it.

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

From R63 Symptoms and signs concerning food and fluid intake applies to 11 codes

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Chapter 18 (R00-R99) Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified applies to 774 codes
  • abnormal findings on antenatal screening of mother (O28.-)
  • certain conditions originating in the perinatal period (P04-P96)
  • signs and symptoms classified in the body system chapters
  • signs and symptoms of breast (N63, N64.5)

Notes

General instructions on how these codes are used.

From Chapter 18 (R00-R99) Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified applies to 774 codes
  • This chapter includes symptoms, signs, abnormal results of clinical or other investigative procedures, and ill-defined conditions regarding which no diagnosis classifiable elsewhere is recorded.
  • Signs and symptoms that point rather definitely to a given diagnosis have been assigned to a category in other chapters of the classification. In general, categories in this chapter include the less well-defined conditions and symptoms that, without the necessary study of the case to establish a final diagnosis, point perhaps equally to two or more diseases or to two or more systems of the body. Practically all categories in the chapter could be designated 'not otherwise specified', 'unknown etiology' or 'transient'. The Alphabetical Index should be consulted to determine which symptoms and signs are to be allocated here and which to other chapters. The residual subcategories, numbered .8, are generally provided for other relevant symptoms that cannot be allocated elsewhere in the classification.
  • The conditions and signs or symptoms included in categories R00-R94 consist of:
  • (a) cases for which no more specific diagnosis can be made even after all the facts bearing on the case have been investigated;
  • (b) signs or symptoms existing at the time of initial encounter that proved to be transient and whose causes could not be determined;
  • (c) provisional diagnosis in a patient who failed to return for further investigation or care;
  • (d) cases referred elsewhere for investigation or treatment before the diagnosis was made;
  • (e) cases in which a more precise diagnosis was not available for any other reason;
  • (f) certain symptoms, for which supplementary information is provided, that represent important problems in medical care in their own right.

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR SYM016
Other general signs and symptoms
Default principal diagnosis: inpatient Yes · outpatient Yes

Convert R63.8 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
783.9 Nutr/metab/devel sym NEC
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About R63.8Overview

What is the ICD-10 code for other symptoms and signs concerning food and fluid intake?

The ICD-10-CM code for other symptoms and signs concerning food and fluid intake is R63.8 (sometimes written as R638). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

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, 2026 through September 30, 2027.

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 641, 640, with relative weights from 0.7864 to 1.3392 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.

Can R63.8 be reported with a code from F50.2?

Not as a rule. The Excludes1 note at R63, which applies to R63.8, lists "bulimia NOS (F50.2-)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).