Wiki Trigger Point Injections-Can we assign

Rio Rancho, NM
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Can we assign procedure codes ICD-9/CPT based on a drawing by the physician in place of written words?

My issue: patient had three trigger point injections. Instead of writing out the sites the physician drew a picture of a head and torso, labeled it as back, marked an “x” for each of the tree injection sites.
You might be able to get away with billing 20552, but probably not. Because the description for trigger point injections specifically states either "1 or 2 muscles" or "3 or more muscles", unless the provider lists the muscles injected or has them marked on the diagram, the documentation is incomplete, because with just a bunch of x's you can't tell how many muscles were injected.