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Usually this means exams,x-rays and cleanings only. However you should contact the carrier for specifics on what they consider to be included in "preventative & diagnostic " services.

This question is too vague, please clarify... Do you want the medical cross code? Do you want the billing guidelines on this code? Do you want a description of the code and it use? Please be more specific...

Compatible crosscode for D7950 is 21125 D4265 would be billed by the drug being used, in order to answer this question we would need to know the specific drug being used for the procedure.

This procedure would not be covered by dental and therefor should be submitted to the medical carrier. However, if you were going to submit to the dental carrier the most appropriate code would be D0999 (unspecified diagnostic procedure, by report)

As long as the surfaces do not connect, they are separate. Insurance will combine to pay less.

what arch should i use

76376 3D rendering with interpertation and reporting of computed tomography, magnetic resonance imaging, ultrasound, or other tomographic modality; not requiring image postprocessing on an independent workstation.

D3332 (incomplete endodontic therapy; inoperable, unrestorable or fractured tooth.

If a full mouth debridement was performed you should use CDT D4355.

According to ADA 2011-2012 code sets this is a valid code and may be used.