It's a felony if you fail to provide vet care as needed in a timely fashion, punishable by fines/jail time.
However, if you're keeping him current on his vaccinations, a reputable vet, before vaccinating any dog generally does a wellness examination, generally that is done yearly, rabies however varies from 1-3 years, depending the area, as well as the individual vet practice.
Clinics should have a vet on premises, as a dog may have an adverse reaction to a vaccine. And/or have an Anaphylactic reaction (anaphylaxis) are sudden, widespread, potentially severe and life-threatening allergic reactions. ...
It's a recommended option, not required, that a senior dog get a comprehensive geriatric examination every six months, so any issues maybe caught early as well as treated sooner, just like young puppies, senior dogs immune system weakens when they age and in addition they are prone to acquiring senior health issues.