EOD Regional Nodes


**Note 1:** Code only regional nodes and nodes, NOS, in this field. Distant nodes are coded in EOD Mets. **Note 2:** Regional lymph node metastases occur primarily in levels VI or VII located near the parathyroid.
Code Description SS2018 N
000 No regional lymph node involvement NONE
300 Level VI - Anterior compartment group - Laterotracheal - Paralaryngeal - Paratracheal - above suprasternal notch - Perithyroidal - Precricoid (Delphian) - Prelaryngeal - Pretracheal - above suprasternal notch - Recurrent laryngeal Level VII - Superior mediastinal group (for other mediastinal node(s), see EOD Mets) - Esophageal groove - Paratracheal - below suprasternal notch - Pretracheal - below suprasternal notch RN
400 Unilateral, bilateral or contralateral nodes Level I - Level IA - Submental - Level IB - Submandibular (submaxillary), sublingual Level II - Upper jugular - Jugulodigastric (subdigastric) - Level IIA - Anterior - Level IIB - Posterior - Upper deep cervical Level III - Middle jugular - Middle deep cervical Level IV - Lower jugular - Jugulo-omohyoid (supraomohyoid) - Lower deep cervical - Virchow node Level V - Posterior triangle group - Posterior cervical - Level VA - Spinal accessory - Level VB - Transverse cervical, supraclavicular Other groups - Cervical, NOS - Deep cervical, NOS - Facial + Buccinator (buccal) + Mandibular + Nasolabial - Internal jugular, NOS - Parapharyngeal - Parotid + Infraauricular + Intraparotid + Periparotid + Preauricular - Retroauricular (mastoid) - Retropharyngeal - Suboccipital RN
800 Regional lymph node(s), NOS Lymph node(s), NOS RN
999 Unknown; regional lymph node(s) not stated Regional lymph node(s) cannot be assessed Not documented in patient record Death Certificate Only U
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