Hello,
As per the NEET 2019 eligibility criteria, minimum age requirement of the candidate is 17 years as on December 31, 2019. Candidates must be born on or before January 1, 2003. So, you are eligible to apply for the NEET UG exam.
You can go through the link below to check the detailed eligibility criteria-

 https://medicine.careers360.com/articles/neet-eligibility-criteria

Good Luck!