国际疾病分类(ICD)被全球应用于公共卫生数据收集等场景。然而，许多国家的报销系统都与当前版本的ICD(ICD-10)相关联，而ICD-10并没有适当地反映慢性疼痛。本研究旨在比较ICD-10和ICD-11在住院患者疼痛管理方面的特异性、临床效用和报销情况。审核了泰国Siriraj医院疼痛管理咨询的住院患者的病历，并将所有与疼痛相关的诊断编码为ICD-10和ICD-11。397名患者的数据显示，ICD-10中未特指的疼痛编码了78％，而在ICD-11版本中只有0.5％。两个版本之间未特指疼痛比例的差距在门诊设置中更大。ICD-10的三个最常见编码是其他慢性疼痛、腰痛和肢体疼痛。ICD-11的三个最常见编码是慢性癌痛、慢性周围神经痛和慢性继发肌肉骨骼疼痛。与许多其他国家一样，在ICD-10中没有编码与疼痛相关的标准报销码。当添加了397个与疼痛相关的编码时，模拟报销费用保持不变，即使存在如劳动成本等疼痛管理成本。与ICD-10版本相比，ICD-11更具特异性，使疼痛诊断更加清晰可见。因此，从ICD-10转换到ICD-11有潜力提高疼痛管理的护理质量和报销情况。版权所有©2023国际疼痛研究协会。

The International Classification of Diseases (ICD) is applied worldwide for public health data collection among other use cases. However, the current version of the ICD (ICD-10), to which the reimbursement system is linked in many countries, does not represent chronic pain properly. This study aims to compare the ICD-10 with the ICD-11 in hospitalized patients in terms of specificity, clinical utility, and reimbursement for pain management. The medical records of hospitalized patients consulted for pain management at Siriraj Hospital, Thailand, were reviewed, and all pain-related diagnoses were coded into ICD-10 and ICD-11. The data of 397 patients showed unspecified pain was coded 78% in the ICD-10 and only 0.5% in the ICD-11 version. The difference gap in the proportion of unspecified pain between the 2 versions is wider than in the outpatient setting. The 3 most common codes for ICD-10 were other chronic pain, low back pain, and pain in limb. The 3 most common codes for ICD-11 were chronic cancer pain, chronic peripheral neuropathic pain, and chronic secondary musculoskeletal pain. As in many other countries, no pain-related ICD-10 codes were coded for routine reimbursement. The simulated reimbursement fee remained the same when adding 397 pain-related codings, even if the cost of pain management, such as cost of labor, existed. Compared with the ICD-10 version, the ICD-11 is more specific and makes pain diagnoses more visible. Thus, shifting from ICD-10 to ICD-11 has the potential to improve both the quality of care and the reimbursement for pain management.Copyright © 2023 International Association for the Study of Pain.