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CLINICAL CODING & REIMBURSEMENT ISSUES IN KNEE SURGERY



Abstract

Purpose: To review the existing coding for knee surgery and ascertain its appropriateness & accuracy for surgical procedures, associated co-morbidities and complications.

Methods: A retrospective review of 100 consecutive knee surgeries (50 arthroplasties and 50 arthroscopies) performed between July-August 2007 was undertaken. The coding data excel sheet and comprehensive hospital records were analysed.

Results: The accuracy of primary procedural codes was 100% & 88% respectively for arthroplasty & arthroscopy. However this respectively fell down to 56 & 60% when the accuracy for entire description of surgical procedure was taken into consideration. The procedural codes did not specifically reflect the surgery performed and lacked reproducibility esp. for arthroscopies. In arthroplasties, patients had similar codes irrespective of whether they had patellar resurfacing or not. Co-morbidities were coded appropriately in 24% of arthroplasty & 36% of arthroscopy patients. The common co-morbidities missed were drug allergies, hypercholesterolemia, heart conditions (IHD, MI, AF, valvular pathologies) and h/o malignancy & deep vein thrombosis. Post-op adverse events were coded in only 2/5 arthroplasties (40%) and 0/3 arthroscopies (0%) respectively.

Conclusion: Coding is a universal language of communication amongst healthcare professionals. Its accuracy is important not just for reimbursement but also for data quality and audit. Coding database also serves as a powerful research tool. The financial implications with respect to generation of appropriate reimbursement i.e. healthcare resource group (HRG) codes (which are dictated by official population and census survey procedural [OPCS4.4] & international classification of diseases [ICD–10] co-morbidity codes) are discussed. The limitations of the existing coding system are highlighted and discussed. Literature emphasizes on the qualification of coders, legible & comprehensive documentation of surgeries & co-morbidities by treating physicians and regular interaction between coders and clinicians. Reimbursement for arthroscopy is less in the NHS unlike in BUPA where it is on par with open surgeries.

Correspondence should be addressed to Mr T Wilton, c/o BOA, BASK at the Royal College of Surgeons, 35–43 Lincoln’s Inn Fields, London WC2A 3PE, England.