Casemix Funding In Australia IAAHS Dresden Conference April 2004 - - PDF document

casemix funding in australia
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Casemix Funding In Australia IAAHS Dresden Conference April 2004 - - PDF document

Casemix Funding In Australia IAAHS Dresden Conference April 2004 Brent Walker Historical Perspective Pre 1975 Hospitals paid per diem benefits only. 1975 - introduction of Medibank the national health insurance scheme. First


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Casemix Funding In Australia

IAAHS Dresden Conference April 2004

Brent Walker

Historical Perspective

  • Pre 1975 – Hospitals paid per diem benefits only.
  • 1975 - introduction of Medibank the national health

insurance scheme.

  • First insurer began paying private hospitals on simple

“cost centre” basis.

– Per diem benefits for accommodation, nursing etc – Benefits for operating theatre and labour ward usage – Benefits for use of ICU/CCU – Other costs reimbursed on item basis.

  • Within 2 years the hospitals were demanding the new

payment arrangements become more sophisticated.

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Hospital Classification

  • It quickly became clear that hospitals that

provided more complex services needed additional benefits so 4 categories of hospital was introduced for per diem benefits.

  • Advanced Surgical
  • Surgical
  • Medical
  • Other (psychiatric and rehabilitation)
  • Also hospitals that were accredited by an

independent accrediting body were paid an additional per diem benefit.

Patient Classification

  • The Federal Government adopted the private sector

hospital classification program and quickly ruined it.

  • In 1986 patient classification was introduced by the

Government for private insurer reimbursement of private hospital per diem charges.

– Advanced Surgical – Surgical – Medical – Obstetric – Psychiatric – Rehabilitation.

  • Per Diem benefits were also stratified into levels.

– $x for first n1 days, $y for next n2 days, etc.

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1995 Reforms

  • Private sector encouraged to contact with private hospitals using Casemix

and within a few years all health insurance benefit structures for private hospital treatment were paid either directly or indirectly through contractual arrangements.

  • Private sector Casemix unit set up to examine the various types of

Casemix that could be used.

  • The conclusion was that current mixture of per diem and cost centre based

benefits were a form of Casemix but that the structure was continually evolving and that for some well defined services episodic payments were

  • appropriate. For many in-hospital services the existing structure was more

appropriate as it was more flexible and hence provided better certainty for hospitals.

  • To illustrate the gaming possibilities of a pure DRG based episodic benefit

structure the Private Sector Casemix Unit provided many examples of DRGs that covered a wide range of possible resource utilisations.

  • One DRG covered operative services of such a diverse nature that 8 out of

the then 12 operating theatre benefits were payable under the current system with theatre fee benefits ranging from around $200 to well over $2000.

Increased Sophistication of Private Sector Hospital Benefits - 2004

  • Per diem benefits highly differentiated by patient

classification and length of inpatient treatment.

  • Theatre fee benefits now at 14 levels
  • Labour ward benefits at 2 or 3 levels
  • ICU and CCU benefits differentiated and often at

different levels depending on stay and complexity of care

  • Prosthesis appliance list of benefits grew from 3 pages in

1987 to currently about 80 pages. (Cost has increased by around 25% per annum since inception)

  • Episodic payments used for some DRGs but more often

defined by the Medicare Medical Benefit Schedule (MBBS) item number that was used for the indicative service.

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Example of Contract Per Diem Benefits

$104 Same day Band 4 $93 Same day Band 3 $84 Same day Band 2 $73 Same day Band 1 Benefit SAME DAY ACCOMMODATION 8+ $104 $118 Step 2 Caesarean Delivery 1 to 7 $145 $159 Step 1 Caesarean Delivery 6+ $104 $118 Step 2 Vaginal Delivery 1 to 5 $145 $159 Step 1 Vaginal Delivery 11+ $112 $127 Step 2 Medical 1 to 10 $137 $152 Step 1 Medical 8+ $112 $127 Step 2 General Surgery 1 to 7 $155 $169 Step 1 General Surgery 11+ $112 $127 Step 2 Advanced Surgery 1 to 10 $163 $177 Step 1 Advanced Surgery Days Shared Private Benefits INPATIENT ACCOMMODATION

Example of Special Unit Per Diem Benefits

$72 5+ Neonatal Special Care Nursery Category 3 $99 1 to 4 Neonatal Special Care Nursery Category 3 $72 15+ Neonatal Special Care Nursery Category 2 $97 5 to 14 Neonatal Special Care Nursery Category 2 $134 1 to 4 Neonatal Special Care Nursery Category 2 $83 15+ Neonatal Special Care Nursery Category 1 $103 5 to 14 Neonatal Special Care Nursery Category 1 $229 1 to 4 Neonatal Special Care Nursery Category 1 Note: certification of diagnosis, treatment & category must accompany claim. $254 Category CC (CCU) $477 Category B ICU $623 Category A ICU Benefits Days SPECIAL UNIT ACCOMMODATION

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Example of Theatre Fee Benefits

$270 Caesarean Section $245 Labour Ward $1,644 Band 13 $1,359 Band 12 $1,218 Band 11 $1,026 Band 10 $869 Band 9 $643 Band 9A $688 Band 8 $495 Band 7 $369 Band 6 $301 Band 5 $209 Band 4 $153 Band 3 $125 Band 2 $75 Band 1 $40 Band 1A Benefit THEATRE FEES BENEFITS

Example of Episodic Benefits Related to MBBS

$137 Sigmoidoscopy/Colonoscopy 32084 $129 Sigmoidoscopy Exam with Dx/Bx >45 min 32081 $182 Sigmoidoscopy Exam with Dx/Bx <or= 45min 32078 $167 Sigmoidoscopy Exam GA 32075 $137 Panendoscopy/Gastroscopy 30478 $143 Panendoscopy/Gastroscopy 30476 $137 Endoscopy Dil. Gastric Stric. 30475 $137 Oesophagoscopy/Panendoscopy 30473 Benefit Description MBBS

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Example of DRG Based Benefits

$ 14 $ 68 + 9 2 1 - 5.00 $1,000 S Vaginal delivery w/o comp O60D $ 14 $ 68 + 9 2 1 - 5.30 $1,045 S Vaginal delivery w moderate O60C $ 14 $ 68 + 11 1 1 - 6.00 $1,176 S Caesarean delivery w/o comp O01D $ 14 $ 68 + 13 2 1 - 7.00 $1,327 S Caesarean delivery w moderate O01C $ 14 $ 68 + 13 3 1 - 7.00 $1,327 S Caesarean delivery w severe O01B $ 14 $ 68 + 11 4.50 $679 S Female Repro System Reconstructive Procs N06Z $ 14 $ 68 + 10 1 1 - 5.80 $876 S Hysterectomy for Non-Malignancy N04Z $ 14 $ 68 + 8 2.40 $362 S Perc crny angioplsty-ami-stent F16Z $ 14 $ 68 + 9 3.00 $453 S Perc crny angioplsty-ami+stent F15Z $ 14 $ 68 + 11 4.50 $679 S Cardiac pacemaker implantation F12Z $ 14 $ 68 + 11 4.50 $679 S Percutan corny angioplasty+ami F10Z $ 14 $ 68 + 14 3 1 - 7.50 $1,191 AS Corony bypas-inva inve pr-cscc F06B $ 14 $ 68 + 15 4 1 - 8.50 $1,349 AS Corony bypas-inva inve pr+cscc F06A $ 14 $ 68 + 16 5 1 - 10.40 $1,651 AS Corony bypass+inva inve pr-ccc F05B $ 14 $ 68 + 20 3 1 - 14.00 $2,223 AS Corony bypass+inva inve pr+ccc F05A $ 14 $ 68 + 3 1.00 $151 S Tonsillectomy, adenoidectomy D11Z $ 14 $ 68 + 4 1.10 $166 S Sinus, mastd&cmplx mddl ear pr D06Z

Private Add Long Outlier Long Days Short Days Days basis Payment Pat Cat Description DRG4

Casemix Rules

  • There is a long list of rules in a contract. There

are rules about:

– Median Days used for DRG – Inliers – Outliers – Extra payments for CCU and ICU days – Extra Payments for Operating Theatre usage – Single room add-ons. – Claiming procedures – Auditing procedures – Definitions used in rules – A lot more detail in the paper

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Public Sector Casemix

  • Introduced in Victoria first in July 1993

– Covered marginal costs of public hospitals – About 75% of public hospital funding came from area/population based formula.

  • The concept was that the Casemix payments would cover the

variable costs of hospitals and the fixed population based area funding would cover the fixed costs. Thus there isno incentive to increase hospital capacity but to utilise existing capacity to the limit.

– This concept was later abandoned

  • Most other states followed in next few years.
  • Model now mainly used (including by Victoria) is 100% of public

hospital costs met by Casemix. This is called the Integrated Casemix model and theoretically provides funding for fixed and variable costs. However State Governments tend to keep control of hospital major capital works programs.

Details Of Current Model in Victoria

  • Coding is from ICD-10 Australian Modification.
  • DRG version AR-DRG4.1 but modified to Vic-DRG4.

– Discriminates between peritoneal and haemodialysis. – Regrouping non-same day principal diagnoses into those requiring and not requiring radiotherapy. – Separation of allogenic and other mainly autologous bone marrow transplants.

  • The payment unit is the Weighted Inlier Equivalent

Separation (WIES).

  • Inlier cases are those with a length of stay within “trim

points” set as 1/3rd (low trim point) and 3 times (high trim point) the average length of stay for the DRG. This is known as “L3H3” policy.

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More Details of Victoria Casemix

  • High Outliers get extra per diem payment based
  • n 70% (surgical) to 80% (medical) of WEIS cost

weight trimmed of theatre and other “one-off” costs.

  • Inliers paid on various bases dependent on
  • DRG. Some same day inliers are paid ½ the

WEIS cost weight.

  • Per annum hospital funding capped by setting

WEIS targets.

  • WEIS targets vary from hospital to hospital.

Other Public Sector Casemix Issues

  • Casemix funding is supposed to put

hospital funding above politics.

  • In reality shifts political interference to new

levels.

  • Casemix payments for same DRG often

vary from one hospital to another.

  • In reality, introduction of integrated

Casemix funding just introduces new gaming rules for funders and hospitals!

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Conclusions

  • Short term efficiency gains can be obtained from episodic Casemix

funding using DRGs.

  • Long term problems can develop as funders and providers learn

new gaming rules.

  • Any system which groups average resource usage for funding

arrangements will cause changes in gaming rules.

  • The best system (author’s view) is one which balances incentives for

the improvement in efficacy and the long term improvement in system capabilities but is continuously able to adapt to changes in medical technology.

  • Casemix payment systems similar to the Private Hospital system

developed in Australia come much closer to meeting this “best system” criteria than the pure Episodic Casemix systems such as that used in the public sector in Australia.

  • What improvements could be made to Australia’s Private Sector

Casemix benefit structures?