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Avoidable hospital readmissions

Reducing avoidable hospital readmissions supports better health outcomes, improves patient safety and leads to greater efficiency in the health system.

What are avoidable hospital readmissions?

A hospital readmission is when a patient has been discharged from hospital and is admitted again within a certain time interval.

They can generally be considered in two broad categories:

  • Readmissions that relate to routine care, for example those that relate to necessary treatments such as chemotherapy or dialysis and are required to ensure safe clinical care.
  • Readmissions that are potentially avoidable.

An avoidable hospital readmission occurs when a patient has been discharged from hospital (index admission) and has a subsequent unplanned admission that is related to the index admission and was potentially preventable.

Avoidable readmissions can be burdensome on the health system and show a need for safety and quality improvements.
 

How we are supporting hospitals to monitor avoidable readmissions

We have a list of conditions considered avoidable hospital readmissions if they occur within the condition-specific time interval.

The specifications include complication groups, intervals, and codes and is intended to be used as part of a suite of indicators to monitor safety and quality of care. A summary of the list is provided below.

Download the avoidable hospital readmissions specifications

Our core hospital-based outcome indicators toolkit also features four unplanned readmission indicators.
 

Summary list of avoidable hospital readmission conditions

Readmission complicationReadmission diagnosisInterval (days)
Pressure injuryStage III ulcer14
Stage IV ulcer7
Unspecified decubitus and pressure area14
Unstageable pressure injury14
Suspected deep tissue injury, depth unknown14
InfectionsUrinary tract infection7
Surgical site infection30
Pneumonia7
Blood stream infection2
Central line and peripheral line associated blood stream infection2
Multi-resistant organism2
Infection associated with devices, implants and grafts90
Infection associated with devices, implants and grafts in genital tract or urinary system30
Infection associated with peritoneal dialysis catheter2
Gastrointestinal infections28
Other high impact infections2
Surgical complicationsPostoperative haemorrhage/haematoma28
Surgical wound dehiscence28
Anastomotic leak28
Cardiac vascular graft failure28
Pain following surgery14
Other surgical complications28
Respiratory complicationsRespiratory failure including acute respiratory distress syndromes21
Aspiration pneumonia14
Pulmonary oedema30
Movement disorders due to psychotropic medications14
Serious alteration to conscious state due to psychotropic medication14
Venous thromboembolismVenous thromboembolism90
Renal failureRenal failure21
Gastrointestinal bleedingGastrointestinal bleeding2
Medication complicationsDrug-related respiratory complications/depression2
Hypoglycaemia4
DeliriumDelirium10
Cardiac complicationsHeart failure30
Ventricular arrhythmias and cardiac arrest30
Atrial tachycardia14
Acute coronary syndrome including unstable angina, STEMI and NSTEMI30
OtherConstipation14
Nausea and vomiting7

Last updated: 13 March 2026