[Your letterhead, if desired; if not, your return address]
[Date of letter-month, day, and year]
[Recipient's first and last names]
[Company name]
[Street or P.O. box address]
[City, State ZIP code]
Dear [recipient's name]:
I was with my mother on Monday of this week for an appointment at your office. At that appointment, she received a diagnosis stating that she has diabetes. Before she proceeds with any treatment, I would like to request that you perform additional and more detailed testing in order to confirm this diagnosis. I have verified that my mother's insurance will cover additional tests.
Please call me at 555-1255 so that we can discuss how to proceed. Thank you for your prompt attention to this important issue.
Sincerely,
[Signature]
[Sender's first and last names]