Ty Lawson -- I'm Going to Rehab

NBA star Ty Lawson says he's finally getting treatment -- entering a rehab center for the next 30 days ... after his 2nd DUI arrest this year.

Lawson appeared in court in Denver moments ago for a hearing on his DUI arrest in Colorado back in January ... where a judge ordered him to be on monitored sobriety, instead of a SCRAM bracelet.

What that means is instead of having to wear an ankle bracelet 24/7 which constantly monitors the user's blood alcohol level, he'll have to routinely blow into a stationary B.A.C. monitoring device.

During the hearing, Lawson's lawyer also announced that he will begin treatment at a rehab center in Southern California beginning tomorrow.

TMZ Sports broke the story ... the Denver Nuggets star was arrested for DUI in L.A. earlier this week. He's due in court for that case in August.

Story developing ...