Spanish to English Medical Medical: Health Care Venezuelan abbreviation (license? specialty?)

This is in a Venezuelan Radiologist's stamp under his signature. It's a report on an MRI. The stamp lists the Radiologist's name, his cedula de identidad, and his MSDS number. All of those I understand. The last item is CMM followed by a four-digit number and that has me stumped. Based on other Venezuelan physician's stamps, it looks like CM might be Colegio de Medicos and the other M might refer to a geographic location, but I could be completely wrong. Are there any native Venezuelans out there who could help?