V.6.2.2 Clinical N

This field identifies the presence or absence of regional lymph node (N) involvement and describes the extent of regional node involvement known prior to the start of any therapy.

Coding Instructions:

Refer to the most current AJCC Cancer Staging Manual for coding instructions.
Code the clinical N as documented by the managing provider or first treating provider in the medical record.
If the managing provider has not recorded the clinical N, registrars will code the clinical N based on the best information available.
Use code 88 for clinical T, N, and M as well as stage group when:

Site/histology combination is not defined in the AJCC Manual.
For in situ tumors that are not staged according to the AJCC Manual.

Codes:

Code	Description
Blank	Not recorded
cX	cNX
c0	cN0
c0A	cN0a
c0B	cN0b
c1	cN1
c1A	cN1a
c1B	cN1b
c1C	cN1c
c2	cN2
c2A	cN2a
c2B	cN2b
c2C	cN2c
c3	cN3
c3A	cN3a
c3B	cN3b
c3C	cN3c
c4	cN4
88	Not applicable

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