Humana is a medical insurance that often has either EyeMed of Humana Vision Care Plan (Humana VCP).
Humana VCP is a vision rider, similar to EyeMed, with its own website and services authorizations. Follow this link to open a Vision Pass.
ID: nh0790 / Password: spring$9
Choose: "Work with Vision Plans." Then, "Provider Functionality and Tools." Then, "Member Search."
Create authorization, check copay and write both on the superbill, similar to with EyeMed.