Malig neoplm of ovrlp sites of prph nrv and autonm nrv sys

This code signifies a malignant tumor that spans across or involves multiple contiguous sites within the peripheral nerves and/or the autonomic nervous system. It indicates that the primary origin of the neoplasm cannot be definitively assigned to a single anatomical site within these systems.

Apply this code when documentation clearly states a malignant neoplasm affecting overlapping regions of peripheral nerves and/or the autonomic nervous system. This is appropriate when the tumor's extent makes it impossible to pinpoint a single, discrete anatomical site of origin within these systems.

• Ensure documentation explicitly states "overlapping sites" or describes a tumor involving multiple, contiguous peripheral/autonomic nerve structures.
• Do not use this code if a more specific site within the peripheral or autonomic nervous system can be identified as the primary origin.
• Sequence this code as the primary diagnosis when it represents the reason for the encounter, followed by codes for any associated symptoms or complications.