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Emergency Data

2004 Most Common ICD9-CM Diagnosis Codes by Clinical Classification Software (CCS) by Visits Statewide
Clinical Classification Software (CCS) developed by Agency for Healthcare Research and Quality (AHRQ) clusters ICD9-CM diagnosis codes into clinically similar categories.


CCS Category DescriptionTotalPercentage
Sprains and strains44,4306.55%
Superficial injury; contusion43,9296.47%
Open wounds39,1595.77%
Other upper respiratory infections34,5485.09%
Abdominal pain25,5023.76%
Fractures25,4983.76%
Disorders of teeth and jaw (e.g.: cavities/gingivitis/abscess)20,3743.00%
Nonspecific chest pain20,1922.98%
Spondylosis(spinal arthritis); intervertebral disc disorders; other back problems19,1032.81%
Otitis media (infection or inflammation of the middle ear) and related conditions15,9342.35%
Skin and subcutaneous tissue infections15,0932.22%
Headache; including migraine13,7092.02%
Urinary tract infections13,6092.01%
Other injuries and conditions due to external causes (e.g.: foreign bodies/heat exhaustion)13,3961.97%
Other connective tissue disease13,3791.97%
Chronic obstructive pulmonary disease and bronchiectasis13,2591.95%
Other lower respiratory disease13,2471.95%
Viral infection10,2211.51%
Other non-traumatic joint disorders9,5321.40%
Allergic reactions9,4791.40%
Pneumonia 9,3361.38%
Other mental conditions8,9511.32%
Asthma8,5731.26%
Other aftercare (e.g.: suture removal/attention to dressings/post surgery/follow-up exams)7,5961.12%
Cardiac dysrhythmias (abnormal heart rhythms)6,8531.01%
Nausea and vomiting6,3980.94%
Other gastrointestinal disorders (e.g.: constipation/diarrhea/heartburn/abdominal mass)6,2960.93%
Anxiety; unexplained physical ailments or concerns; dissociative; and personality disorder6,1400.90%
Conditions associated with dizziness or vertigo5,9990.88%
Other ear and sense organ disorders5,9120.87%
All other193,02528.44%
Total678,672100.00%



Source: Maine Health Data Organization, 2007