Horizon Family Medicine Pllc in Fort Gratiot. Npino.com DA: 9 PA: 50 MOZ Rank: 67. The NPI Number for Horizon Family Medicine Pllc is 1427693761. The current location address for Horizon Family Medicine Pllc is 3041 Commerce Dr Ste B, , Fort Gratiot, Michigan and the contact number is 810-385-4342 and fax number is --..