Alphabetic Index FY2027

R53.81

Other malaise

FY2027Chapter 18: Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified/R50–R69 General symptoms and signs

BillableComplete code, valid to report
Care settingsHospice: not accepted as primaryIPF Primary · MS-DRG 947–948

R53.81 (also written R5381) is a billable ICD-10-CM diagnosis code for other malaise. It is part of the FY2027 code set, effective October 1, 2026. It is one of the 6 codes in category R53 (Malaise and fatigue). The Alphabetic Index lists it under 4 entries. Its coding notes include 9 Excludes1 entries and 4 Excludes2 entries.

Guidelines tip

From the FY2027 Official Guidelines. ICD10Ref adds no rules of its own.

Symptom and sign codes are acceptable when no definitive diagnosis has been established. They are not added for signs that are routinely associated with a diagnosis.

Guidelines I.C.18.a; I.C.18.bSymptom and sign codesRead the official text

Excludes1

Not coded here. The listed conditions generally should not be reported together.

This code
  • age-related physical debility (R54)
Inherited from R53.8 Other malaise and fatigue
  • combat exhaustion and fatigue (F43.0)
  • congenital debility (P96.9)
  • exhaustion and fatigue due to excessive exertion (T73.3)
  • exhaustion and fatigue due to exposure (T73.2)
  • exhaustion and fatigue due to heat (T67.-)
  • exhaustion and fatigue due to pregnancy (O26.8-)
  • exhaustion and fatigue due to recurrent depressive episode (F33-)
  • exhaustion and fatigue due to senile debility (R54)

Excludes2

Not included here. Both codes may be reported if the patient has both conditions.

Also from chapter/block level (4 notes)
Inherited from Chapter 18 Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
  • 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)

Care settings

How CMS programs treat this code. These are CMS claim edits and list entries, not coverage or eligibility rules.

Hospice: not accepted as primary

Not accepted as the principal diagnosis on a hospice claim (bill types 081x and 082x). The Integrated OCE returns an edit for this code.
Reason: Supplementary or additional code, not allowed as principal diagnosis.

Source: CMS Integrated Outpatient Code Editor (IOCE) v27.3, effective October 1, 2026, edit 113

IPF Primary

IPF MS-DRG adjustment. A principal diagnosis of this code groups to one of these MS-DRGs. Which one depends on other facts of the stay, so the factor is a range:

MS-DRGDescriptionFactor
947Signs and Symptoms w MCC1.12
948Signs and Symptoms w/out MCC1.09
A principal diagnosis that groups to none of the 19 designated MS-DRGs gets no MS-DRG adjustment. Otherwise the claim still receives the federal per diem base rate and the other adjustments.

Source: CMS IPF PPS FY 2027 final rule (CMS-1847-F), Addendum A; code lists from the CMS MS-DRG Definitions Manual v44; effective for discharges on or after October 1, 2026

Inclusion terms

Conditions classified to this code.

This code
  • Chronic debility
  • Debility NOS
  • General physical deterioration
  • Malaise NOS
  • Nervous debility

Notes

Also from chapter/block level (9 notes)
Inherited from Chapter 18 Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
  • 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.

Alphabetic Index terms

Terms the official Alphabetic Index lists for this code. 4 entries