The ICD-9 code range PAIN ) for 338-338 is medical classification list by the World Health Organization (WHO).
Pain not elsewhere classified
Central pain syndrome
Acute pain
Acute pain due to trauma
Acute post-thoracotomy pain
Other acute postoperative pain
Other acute pain
Chronic pain
Chronic pain due to trauma
Chronic post-thoracotomy pain
Other chronic postoperative pain
Other chronic pain
Neoplasm related pain (acute) (chronic)
Chronic pain syndrome