Changing CPT code on Super Bill

When I previously asked about creating CPT codes to reflect the same service, but different lengths of time (e.g., 92507 for 30 min; 92507 for 45 min), I was given the advice below from SP:

"At this time, our platform will not allow you to add the same service code more than once. However, I can suggest an alternative workflow. 

To create different session lengths and prices for the same CPT code you can create a new service code using the CPT code with a slight alteration. To do this you can go to Settings > Billing & Services > Services > Add New Service and type in something like "97124 +", then click Add New Code. 

I recommend adding a symbol to the end of the CPT because it can be easily edited in the event that you need to create a claim for insurance. Once you have added the code, you can fill in the description and pricing details accordingly. To do this, go to the client's Overview page > + Create New > Claim/CMS1500. The claim will then appear. In the services section, you can edit the text. You can delete the "+" beside of the CPT code."

A NEW RELATED QUESTION...

I followed this advice and created a CPT code with a slight alteration (e.g., 92507-L). However, I need to be able to delete the L on the superbill. I don't file claims - I give the Super Bill to the client for them to file their own claim. How can I delete this "alteration?"