Free online searchable
2009 ICD-9-CM
Diseases and Injuries
>> Tabular
Index
>> Alphabetic
Index
Procedures
>> Tabular
Index
>>
Alphabetic Index
Appendices
>> Drugs
/ Chemicals
>> External Causes
Other Resources
>> HCPCS Alpha
>> Medical
Dictionary
>> Drug Directory
Tips
Contribute
| Ozone An unstable triatomic form of oxygen, O3, that exists in the atmosphere in varying proportions. It is produced continuously in the outer layers of the atmosphere by the action of solar UV-radiation on the oxygen of the air. |