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In our previous study, we showed that the earliest time point for reinnervation of the anterior tibialis by regenerating axons was 42 days PO (Ghergherehchi et al., 2019a)

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Educational commentary

The CPT code matches the imaging protocol performed: 73721 for without contrast, 73722 for with contrast, 73723 for both phases The ICD-10 primary diagnosis is laterality-specific and matches the joint named in the order The clinical note documents the specific indication with prior treatment history for non-emergent presentations Modifier RT or LT is applied to match the documented joint side Modifier 26 or TC matches the actual billing arrangement The prior authorization reference number sits in Box 23 for California commercial payers that required it AUC documentation is suppressed, since the AUC program has been paused since January 1, 2024 Per-joint billing is confirmed: separate claim lines with Modifier 59 for each additional joint on the same date The original claim status is verified before any resubmission to prevent a CO-18 duplicate denial For the full CO-18 duplicate claim resolution workflow, see ClaimMaxs CO-18 denial guide