Labworks USA uses Quest Diagnostic’s network of collection sites, the largest network in the USA. Thousands of locations to choose from means you’re never far away from a collection site. Input only the zip code of the desired testing facility. Adding the full address often negates the search or reduces the search results. You are able to use any out of network collection site and have the specimen sent to Quest Diagnostic’s. Please note that this will incur an additional fee equal to the cost of the collection.