* Medical Diagnostician (Physician): This requires a minimum of 4 years of medical school following a 4-year bachelor's degree. Residency training then follows, lasting 3-7 years depending on the specialty.
* Veterinary Diagnostician (Veterinarian): Similar to medical doctors, veterinarians need a 4-year undergraduate degree followed by 4 years of veterinary school. Further specialization may involve internships and residencies.
* Dental Diagnostician (Dentist): Dental school typically takes 4 years after completing a bachelor's degree. Specializations would require additional training.
* Psychology Diagnostician (Clinical Psychologist): This requires a doctoral degree (PhD or PsyD), which generally takes 5-7 years of graduate study beyond a bachelor's degree. Postdoctoral training is often required.
* Other Diagnostic Professionals: Many other fields involve diagnosis, such as radiologic technologists, medical laboratory scientists, or physical therapists. The education requirements for these roles vary significantly, typically involving associate's or bachelor's degrees with additional certifications or licensure.
Therefore, there's no single answer. The time commitment ranges from a few years for an associate's degree to over a decade for a medical or veterinary specialty. You need to specify the *kind* of diagnostician you want to be to determine the length of college and post-graduate training.