R65.20
Severe sepsis without septic shock
Billable FY2026 2025-10-01 → 2026-09-30
Exclusions 4 never code together
R00-R99chapter
Excludes2 — not included here, but the patient may have both. Code both when documented.
Instructional notes 31
R65.20code
Inclusion terms
- Severe sepsis NOS
R65.2code
Inclusion terms
- Infection with associated acute organ dysfunction
- Sepsis with acute organ dysfunction
- Sepsis with multiple organ dysfunction
- Systemic inflammatory response syndrome due to infectious process with acute organ dysfunction
Code first
- underlying infection, such as:
- infection following a procedure (T81.4-)T81.4-
- infections following infusion, transfusion and therapeutic injection (T80.2-)T80.2-
- puerperal sepsis (O85)O85
- sepsis following complete or unspecified spontaneous abortion (O03.87)O03.87
- sepsis following ectopic and molar pregnancy (O08.82)O08.82
- sepsis following incomplete spontaneous abortion (O03.37)O03.37
- sepsis following (induced) termination of pregnancy (O04.87)O04.87
- sepsis NOS (A41.9)A41.9
Use additional code
- code to identify specific acute organ dysfunction, such as:
- acute kidney failure (N17.-)N17.-
- acute respiratory failure (J96.0-)J96.0-
- critical illness myopathy (G72.81)G72.81
- critical illness polyneuropathy (G62.81)G62.81
- disseminated intravascular coagulopathy [DIC] (D65)D65
- encephalopathy (metabolic) (septic) (G93.41)G93.41
- hepatic failure (K72.0-)K72.0-
R00-R99chapter
Notes
- 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:R00-R94
- (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.
Index entries leading here 3
Alongside this code 1 same parent — R65.2
Medications 1
MED-RT files conditions by MeSH, which carves the world differently from ICD-10. These are name matches on this code's description, offered as candidates — not as an assertion that they are this code.
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.