2006 ICD-9-CM Volume 1 Diagnosis Codes Home > Injury And Poisoning 800-999 > Other And Unspecified Effects Of External Causes 990-995 > ICD-9-CM Diagnosis 993 Effects of air pressure 993 is a non-specific code that cannot be used to specify a diagnosis ICD-9-CM Diagnosis 993.0 Barotrauma otitic 993.0 is a specific code that can be used to specify a diagnosis 993.0 contains 8 index entries ICD-9-CM Diagnosis 993.1 Barotrauma sinus 993.1 is a specific code that can be used to specify a diagnosis 993.1 contains 6 index entries ICD-9-CM Diagnosis 993.2 Other and unspecified effects of high altitude A morbid condition of ANOXIA caused by the reduced available oxygen at high altitudes. 993.2 is a specific code that can be used to specify a diagnosis 993.2 contains 33 index entries ICD-9-CM Diagnosis 993.3 Caisson disease A condition occurring as a result of exposure to a rapid fall in ambient pressure. Gases, nitrogen in particular, come out of solution and form bubbles in body fluid and blood. These gas bubbles accumulate in joint spaces and the peripheral circulation impairing tissue oxygenation causing disorientation, severe pain, and potentially death. 993.3 is a specific code that can be used to specify a diagnosis 993.3 contains 23 index entries ICD-9-CM Diagnosis 993.4 Effects of air pressure caused by explosion 993.4 is a specific code that can be used to specify a diagnosis 993.4 contains 1 index entry ICD-9-CM Diagnosis 993.8 Other specified effects of air pressure 993.8 is a specific code that can be used to specify a diagnosis 993.8 contains 1 index entry ICD-9-CM Diagnosis 993.9 Unspecified effect of air pressure 993.9 is a specific code that can be used to specify a diagnosis 993.9 contains 1 index entry