Denominator limited to separations with a separation date between 1 July and 19 May in the reference year.
Denominator excludes separations where the patient died in hospital.
Presented per 1,000 separations.
Unplanned/unexpected readmissions are those readmissions where the principal diagnosis indicates an adverse event. These include ICD-10AM codes: T80–88, T98.3, E89, G97, H59, H95, I97, J95, K91, M96 or N99.
Principal diagnoses codes
A principal diagnosis for the readmission has one of the following ICD-10-AM (5th Ed) codes: T80–88, T98.3, E89, G97, H59, H95, I97, J95, K91, M96 or N99.
T80 Complications following infusion, transfusion and therapeutic injection
T81 Complications of procedures, not elsewhere classified
T82 Complications of cardiac and vascular prosthetic devises, implants and grafts
T83 Complications of genitourinary prosthetic devices, implants and grafts
T84 Complications of internal orthopaedic prosthetic devices, implants and grafts
T85 Complications of other internal prosthetic devices, implants and grafts
T86 Failure and rejection of transplanted organs and tissues
T87 Complications peculiar to reattachment and amputation
T88 Other complications of surgical and medical care, not elsewhere classified
T98.3 Sequelae of complications of surgical and medical care, not elsewhere classified
E89 Postprocedural endocrine and metabolic disorders, not elsewhere classified
G97 Postprocedural disorders of nervous system, not elsewhere classified
H59 Postprocedural disorders of eye and adnexa, not elsewhere classified
H95 Postprocedural disorders of ear and mastoid process, not elsewhere classified
I97 Postprocedural disorders of circulatory system, not elsewhere classified
J95 Postprocedural respiratory disorders, not elsewhere classified
K91 Postprocedural disorders of digestive system, not elsewhere classified
M96 Postprocedural musculoskeletal disorders, not elsewhere classified
N99 Postprocedural disorders of genitourinary system, not elsewhere classified
Procedure codes
Number of separations in which one of the following surgical procedures was undertaken: knee replacement; hip replacement; tonsillectomy & adenoidectomy; hysterectomy; prostatectomy; cataract surgery; appendicectomy.
The following is a list of the specific ACHI (5th Ed) procedure codes which are included in the specifications for each of the selected surgical procedures.
Procedure
Procedure Codes
Description
Knee replacement
49518-00
Total arthroplasty of knee, unilateral
49519-00
Total arthroplasty of knee, bilateral
49521-02
Total arthroplasty of knee with bone graft to tibia, unilateral
Hip replacement
49318-00
Total arthroplasty of hip, unilateral
49319-00
Total arthroplasty of hip, bilateral
Tonsillectomy & adenoidectomy
41789-00
Tonsillectomy without adenoidectomy
41789-01
Tonsillectomy with adenoidectomy
41801-00
Adenoidectomy without tonsillectomy
Hysterectomy
35653-01
Total abdominal hysterectomy
35653-02
Abdominal hysterectomy with unilateral salpingo-oophorectomy
35653-03
Abdominal hysterectomy with bilateral salpingo-oophorectomy
35661-00
Abdominal hysterectomy with extensive retroperitoneal dissection
35670-00
Abdominal hysterectomy with radical excision of pelvic lymph nodes
35756-00
Laparoscopically assisted vaginal hysterectomy proceeding to abdominal hysterectomy
35756-01
Laparoscopically assisted vaginal hysterectomy proceeding to abdominal hysterectomy with unilateral salpingo-oophorectomy
35756-02
Laparoscopically assisted vaginal hysterectomy proceeding to abdominal hysterectomy with bilateral salpingo-oophorectomy
35657-00
Vaginal hysterectomy
35673-00
Vaginal hysterectomy with unilateral salpingo-oophorectomy
35673-01
Vaginal hysterectomy with bilateral salpingo-oophorectomy
35667-00
Radical abdominal hysterectomy
35664-00
Radical abdominal hysterectomy with radical excision of pelvic lymph nodes
35664-01
Radical vaginal hysterectomy with radical excision of pelvic lymph nodes
35667-01
Radical vaginal hysterectomy
90443-00
Other excision of uterus
Prostatectomy
37207-00
Endoscopic laser ablation of prostate (includes TULIP)
37201-00
Transurethral needle ablation of prostate
37203-00
Transurethral resection of prostate
37203-02
Transurethral electrical vaporisation of prostate
37203-04
Microwave thermotherapy of prostate
37203-05
High intensity focussed ultrasound (transrectal) of prostate
37207-01
Endoscopic laser excision of prostate
37200-03
Suprapubic prostatectomy
37200-04
Retropubic prostatectomy
37224-00
Endoscopic destruction of prostatic lesion
37224-01
Endoscopic resection of prostatic lesion
90407-00
Excision of other lesion of prostate
37203-03
Cryoablation of prostate
Cataract surgery
42698-00
Intracapsular extraction of crystalline lens
42702-00
Intracapsular extraction of crystalline lens with insertion of foldable artificial lens
42702-01
Intracapsular extraction of crystalline lens with insertion of other artificial lens
42698-01
Extracapsular extraction of crystalline lens by simple aspiration (and irrigation) technique
42702-02
Extracapsular extraction of crystalline lens by simple aspiration (and irrigation) technique with insertion of foldable artificial lens
42702-03
Extracapsular extraction of crystalline lens by simple aspiration (and irrigation) technique with insertion of other artificial lens
42698-02
Extracapsular extraction of crystalline lens by phacoemulsification and aspiration of cataract
42702-04
Extracapsular extraction of crystalline lens by phacoemulsification and aspiration of cataract with insertion of foldable artificial lens
42702-05
Extracapsular extraction of crystalline lens by phacoemulsification and aspiration of cataract with insertion of other artificial lens
42698-03
Extracapsular crystalline lens extraction by mechanical phacofragmentation and aspiration of cataract
42702-06
Extracapsular crystalline lens extraction by mechanical phacofragmentation and aspiration of cataract with insertion of foldable artificial lens
42702-07
Extracapsular crystalline lens extraction by mechanical phacofragmentation and aspiration of cataract with insertion of other artificial lens
42698-04
Other extracapsular extraction of crystalline lens
42702-08
Other extracapsular extraction of crystalline lens with insertion of foldable artificial lens
42702-09
Other extracapsular extraction of crystalline lens with insertion of other artificial lens
42731-01
Extraction of crystalline lens by posterior chamber sclerotomy with removal of vitreous
42698-05
Other extraction of crystalline lens
42702-10
Other extraction of crystalline lens with insertion of foldable artificial lens
42702-11
Other extraction of crystalline lens with insertion of other artificial lens
Appendicectomy
30571-00
Appendicectomy
30572-00
Laparoscopic appendicectomy
Computation:
1,000 x (Numerator ÷ Denominator)
Calculated separately for each of the specified procedures
Numerator:
Number of separations for public hospitals which meet all of the following criteria:
The separation is a readmission to the same hospital following a separation in which one of the following procedures was performed: knee replacement; hip replacement; tonsillectomy & adenoidectomy; hysterectomy; prostatectomy; cataract surgery; appendicectomy (see procedure codes in following table)
The readmission occurs within 28 days of the previous date of separation
A principal diagnosis for the readmission has one of the following ICD10-AM codes: T80–88, T98.3, E89, G97, H59, H95, I97, J95, K91, M96 or N99
Numerator data elements:
Denominator:
Number of separations in which one of the following surgical procedures was undertaken: knee replacement; hip replacement; tonsillectomy & adenoidectomy; hysterectomy; prostatectomy; cataract surgery; appendicectomy.
Denominator data elements:
Disaggregation data elements:
Comments:
Specified disaggregation: Nationally and by state/territory: Indigenous status, SEIFA of residence, remoteness area, hospital peer group.
Available disaggregation: Nationally and by state/territory: Indigenous status, SEIFA of residence, remoteness area, hospital peer group.
Data for 2008-09 will be available in May 2010.
Most recent data available for 2010 CRC baseline report: 2007-08.
Further development of data linkage-based approaches to construction of this indicator.
In future, linkage between consecutive years of data can allow analysis of 12 full months of data, and allow the 19 May cut-off date for the initial separation to be changed, if necessary.
Further refinement of the procedures list and/or the included diagnoses on readmission, incorporating clinical advice, could be undertaken, if desired.
Consideration to be given to whether patient and establishment identifier information would be available for ‘within-hospital’ readmission rate calculation for private hospitals, and readmissions to a different hospital to the initial separation.
Possible development of data elements to identify unplanned/unexpected readmissions (for example, a data element to be used for each separation to indicate whether a readmission was planned).
Other issues caveats:
Disaggregations within individual jurisdictions will be limited by data quality considerations. Some disaggregations may result in numbers too small for publication.
