The parameters for this web service are:

Filter - filter for the results
LatitudeLongitude - Latitude and Longitude for the location to search around
SearchRadiusInMiles - Search radius in miles
MinimumRecordCount - minimum number of HIV AIDS Care Providers requested.
MaximumSearchRadiusInMiles - maximum search radius in miles
ExpandRadiusbyMiles - expand search radius in miles. This is used if number of HIV AIDS Care Providers found within the provided search radius are less than the mimimum number of HIV AIDS Care Providers requested. Token - Organization Token provided by HDW