Doctors, instead of going to the Comelec office to verify your registration, why not verify it online? Find your precinct number and check if you are still in the voters' list. All you need to do is to go to the Comelec Online Precinct Finder, fill the online form. The data needed is just your complete name and birthdate. You can verify also in behalf of other persons you know. However, if you applied for registration last December 21, 22, 23, 28 and 29, 2009 your record is not yet included according to the Comelec website.
And while you are at it, drop by the main page of the Comelec to download the online sample ballot for shading practice and familiarization.