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338 Pain, not elsewhere classified 
338.0 Central pain syndrome convert 338.0 to ICD-10-CM 338.1 Acute pain 
338.11 Acute pain due to trauma convert 338.11 to ICD-10-CM 338.12 Acute post-thoracotomy pain convert 338.12 to ICD-10-CM 338.18 Other acute postoperative pain convert 338.18 to ICD-10-CM
338.19 Other acute pain convert 338.19 to ICD-10-CM 338.2 Chronic pain 338.21 Chronic pain due to trauma convert 338.21 to ICD-10-CM 338.22 Chronic post-thoracotomy pain convert 338.22 to ICD-10-CM 338.28 Other chronic postoperative pain convert 338.28 to ICD-10-CM 338.29 Other chronic pain convert 338.29 to ICD-10-CM 338.3 Neoplasm related pain (acute) (chronic) convert 338.3 to ICD-10-CM 338.4 Chronic pain syndrome convert 338.4 to ICD-10-CM