Hello,

Yes, it is valid. If your disability is any of the ones enlisted by the MCI for admission of disabled candidates (refer: https://www.indiatoday.in/education-today/news/story/neet-2019-no-quota-guidelines-for-pwd-candidates-yet-affected-ones-ask-deadline-extension-for-registration-1398005-2018-11-28 ), then your disability certificate issued from the state government should be valid. However, if you applied under disability quota and it turns out that you are ineligible, then you won't be getting a seat.

Thanks, hope this helps.