2026 ICD-10-CM Diagnosis Code C77.0Secondary and unspecified malignant neoplasm of lymph nodes of head, face and neck

ICD-10-CM Codes›C00–D49›C76-C80›C77

ICD-10-CM C77.0
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

C77.0 is a billable ICD-10-CM diagnosis code for secondary and unspecified malignant neoplasm of lymph nodes of head, face and neck. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 820 through 825, 840 through 842. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Secondary malignancies.

Code Identity

ICD-10-CM Code
C77.0
Billable Status
Yes — Valid for Submission
Code Describes
Secondary and unspecified malignant neoplasm of lymph nodes of head, face and neck
Short Description
Sec and unsp malig neoplasm of nodes of head, face and neck
Parent Code
C77
Secondary and unspecified malignant neoplasm of lymph nodes

Code Classification

ChapterC00–D49Neoplasms
SectionC76-C80Malignant neoplasms of ill-defined, other secondary and unspecified sites
CategoryC77Secondary and unspecified malignant neoplasm of lymph nodes
This CodeC77.0Secondary and unspecified malignant neoplasm of lymph nodes of head, face and neck

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Metastasis to head and neck lymph node
  • Metastasis to lymph node from adenocarcinoma
  • Metastatic adenocarcinoma to lymph node of head and/or neck
  • Metastatic carcinoma to lymph node of head and neck
  • Metastatic malignant neoplasm to lymph nodes of face
  • Metastatic malignant neoplasm to lymph nodes of head
  • Metastatic malignant neoplasm to lymph nodes of neck
  • Metastatic malignant neoplasm to occipital lymph nodes
  • Metastatic malignant neoplasm to parotid lymph nodes
  • Metastatic malignant neoplasm to preauricular lymph nodes
  • Metastatic malignant neoplasm to retropharyngeal lymph nodes
  • Metastatic malignant neoplasm to scalene lymph nodes
  • Metastatic malignant neoplasm to submandibular lymph nodes
  • Metastatic malignant neoplasm to submaxillary gland
  • Metastatic malignant neoplasm to submental lymph nodes
  • Metastatic malignant neoplasm to supraclavicular lymph nodes
  • Metastatic malignant neoplasm to supraclavicular region
  • Metastatic squamous cell carcinoma of lymph nodes of head and neck
  • Metastatic squamous cell carcinoma to lymph node
  • Neoplasm of lymph node of face
  • Neoplasm of occipital lymph nodes
  • Neoplasm of parotid lymph nodes
  • Neoplasm of preauricular lymph nodes
  • Neoplasm of retropharyngeal lymph nodes
  • Neoplasm of scalene lymph nodes
  • Neoplasm of submandibular lymph nodes
  • Neoplasm of submental lymph nodes
  • Neoplasm of supraclavicular lymph nodes
  • Neoplasm of supraclavicular region

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Inclusion Terms

  • Secondary and unspecified malignant neoplasm of supraclavicular lymph nodes

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR NEO070
Secondary malignancies
Default principal diagnosis: inpatient Yes · outpatient Yes

Table of NeoplasmsClinical

Anatomical sites in the Table of Neoplasms that reference this code family.

SiteMalig.
Primary		Malig.
Secondary		Ca
in situ		BenignUncertainUnspec.
lymph, lymphatic channel NEC › gland (secondary) › auricular (anterior) (posterior)–C77.0–D36.0D48.7D49.89
lymph, lymphatic channel NEC › gland (secondary) › cervical–C77.0–D36.0D48.7D49.89
lymph, lymphatic channel NEC › gland (secondary) › cervicofacial–C77.0–D36.0D48.7D49.89
lymph, lymphatic channel NEC › gland (secondary) › face–C77.0–D36.0D48.7D49.89
lymph, lymphatic channel NEC › gland (secondary) › head–C77.0–D36.0D48.7D49.89
lymph, lymphatic channel NEC › gland (secondary) › jugular–C77.0–D36.0D48.7D49.89
lymph, lymphatic channel NEC › gland (secondary) › mandibular–C77.0–D36.0D48.7D49.89
lymph, lymphatic channel NEC › gland (secondary) › neck–C77.0–D36.0D48.7D49.89
lymph, lymphatic channel NEC › gland (secondary) › occipital–C77.0–D36.0D48.7D49.89
lymph, lymphatic channel NEC › gland (secondary) › parotid–C77.0–D36.0D48.7D49.89
lymph, lymphatic channel NEC › gland (secondary) › preauricular–C77.0–D36.0D48.7D49.89
lymph, lymphatic channel NEC › gland (secondary) › prelaryngeal–C77.0–D36.0D48.7D49.89
lymph, lymphatic channel NEC › gland (secondary) › pretracheal–C77.0–D36.0D48.7D49.89
lymph, lymphatic channel NEC › gland (secondary) › retropharyngeal–C77.0–D36.0D48.7D49.89
lymph, lymphatic channel NEC › gland (secondary) › scalene–C77.0–D36.0D48.7D49.89
lymph, lymphatic channel NEC › gland (secondary) › sublingual–C77.0–D36.0D48.7D49.89
lymph, lymphatic channel NEC › gland (secondary) › submandibular–C77.0–D36.0D48.7D49.89
lymph, lymphatic channel NEC › gland (secondary) › submaxillary–C77.0–D36.0D48.7D49.89
lymph, lymphatic channel NEC › gland (secondary) › submental–C77.0–D36.0D48.7D49.89
lymph, lymphatic channel NEC › gland (secondary) › supraclavicular–C77.0–D36.0D48.7D49.89
lymph, lymphatic channel NEC › gland (secondary) › Virchow's–C77.0–D36.0D48.7D49.89
Virchow's glandC77.0C77.0–D36.0D48.7D49.89

Patient EducationClinical

Cancer

Cancer is not just one disease but many diseases. Cancer begins in your cells, which are the building blocks of your body. Usually, your body forms new cells as needed, replacing old cells that die. Sometimes this process goes wrong. New cells grow even when you don't need them, and old cells don't die when they should.

The full article covers:

  • What is cancer?
  • What are the types of cancer?
  • How does cancer develop?
  • What are the symptoms of cancer?
  • How is cancer diagnosed?
  • What are the treatments for cancer?
  • Can cancer be prevented?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert C77.0 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
196.0 Mal neo lymph-head/neck
Exact Match The mapping is direct, with no qualifiers.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About C77.0Overview

Is C77.0 (Secondary and unspecified malignant neoplasm of lymph nodes) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report secondary and unspecified malignant neoplasm of lymph nodes of head, face and neck on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does C77.0 group to?

When secondary and unspecified malignant neoplasm of lymph nodes of head, face and neck is the principal diagnosis on an inpatient stay, it groups to MS-DRG 820, 821, 822, 823, 824, 825, 840, 841, 842, with relative weights from 1.0104 to 5.8648 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of C77.0?

Under the General Equivalence Mappings, secondary and unspecified malignant neoplasm of lymph nodes of head, face and neck converts to ICD-9-CM 196.0 (mal neo lymph-head/neck). The mapping is a direct match.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.