1e480021_iness___Local_Search___Part_15__Additional_details
[Date/Area Affected / Issue] 01/13/12 Places: Google adds the category “emergency” to virtually all doctors & dentists Places listing whether they provide emergency care or not [Additional details] 
It appears to have happened concurrently with the 01/12/12 index push and is likely caused by bad source data
Google Places (Maps & Local) | Understanding Google My Business & Local Search - Part 15
Additional details