When you are writing for a geriatrics office you will want to write for an audience of someone 45 years and older. Even though 45 is not considered elderly, many people this age do get issues that they must see a geriatric doctor for. The education level would be for someone with a high school education or GED. The economic status of the people you are reaching will vary. Some people will be high living while others could be very poor. You will want to write about the healthcare that the patients may receive and laws about HIPPA.