Prospect Medical Office, Llc in Midland Park, NJ . Health (6 days ago) Prospect Medical Office, Llc is a medicare enrolled primary clinic (Internal Medicine) in Midland Park, New Jersey.The current practice location for Prospect Medical Office, Llc is 301 Godwin Ave, Midland Park, New Jersey.For appointments, you can reach them via phone at (201) 444-4526.The mailing address for Prospect ....