Tannehil was having an MRI on Monday but he isn't believed to require a surgical reconstruction of his ACL prior to the 2017 season, according to NFL Network's Ian Rapoport.
Tannehill suffered a sprained ACL and MCL in his left knee in the Dec. 11 game against the Arizona Cardinals in Week 14.
The MCL sprain is giving Tannehill some trouble and he might visit Germany for the platelet-rich plasma therapy used by some athletes including former Los Angeles Lakers star Kobe Bryant, according to the report. The procedure takes a patient's blood, spins it to separate the platelets, then is re-injected into the knee.
For the season, the 28-year-old Tannehill completed 67.1 percent of his passes, throwing for 2,995 yards, 19 touchdowns and 12 interceptions with a 93.5 passer rating in 13 games.
The Dolphins are hopeful that Tannehill will be healthy enough to participate in the offseason training activities that begin in April.
"We're still working through the process," Dolphins vice president of football operations Mike Tannenbaum told the Fort Lauderdale Sun Sentinel last week at the Senior Bowl. "As always, with all our players, organizationally, player health and safety is paramount. We'll do what's best for the player."