Largely based in America there are an increaing number of online services which enable a patient to get a second opinion from an online Doctor. There is a mixture of online health services available and this contrasts with  online symptom checkers  artificial intelligence diagnostic aids and  online consultation.
From their own website
Get instant medical second opinion online. Ask a Board Certified doctor for medical advice. Prices starting at 49$.
Source: Medical Second Opinion Services | Ask a Doctor Advice Online