This variable is contained in the following files: Home Health Agency (Encounter, Preliminary File), Inpatient File (Encounter, Preliminary File), Outpatient (Encounter, Preliminary File), Skilled Nursing Facility (Encounter, Preliminary File), Home Health Agency (Encounter, Final File), Inpatient File (Encounter, Final File), Outpatient (Encounter, Final File), Skilled Nursing Facility (Encounter, Final File)
SAS Name
CLM_1ST_DGNS_E_CD
The code used to identify the 1st external cause of injury, poisoning, or other adverse effect. This diagnosis E code is also stored as the 1st occurrence of the diagnosis E code trailer.
On October 1, 2015 the conversion from the 9th version of the International Classification of Diseases (ICD-9-CM) to version 10 (ICD-10-CM) occurred. ICD-10 has more than 70,000 unique diagnosis codes compared to approximately 14,000 ICD-9 codes, which allows for more detail surrounding diagnoses.
There are additional E code fields available in this file. The lower the number in the variable name, the more important the diagnosis in the patient treatment/billing (i.e., ICD_DGNS_E_CD1 is considered more important than ICD_DGNS_E_CD9).
Source: Medicare Advantage Organizations (MAOs)