Diagnosis Code: C79.9

Short Description: Secondary malignant neoplasm of unspecified site

Long Description: Secondary malignant neoplasm of unspecified site

The code C79.9 is VALID for claim submission

Code Classification:

• Neoplasms (C00–D49)
  • Malignant neoplasms of ill-defined, other secondary and unspecified sites (C76-C80)
    • Secondary malignant neoplasm of other and unspecified sites (C79)
      • C79.9 Secondary malignant neoplasm of unspecified site

Code Version: 2022 ICD-10-CM

Synonyms

• Distant metastasis present
• Germline BRCA-mutated, HER2-negative metastatic breast cancer
• Human epidermal growth factor 2 negative carcinoma of breast
• Intergroup rhabdomyosarcoma study post-surgical clinical group finding
• Intergroup rhabdomyosarcoma study post-surgical clinical group IV: Any size primary tumor, with or without regional lymph node involvement, with distant metastases, without respect to surgical approach to primary tumor
• Lymphedema due to malignant infiltration
• Malignant tumor involving an organ by direct extension from bladder
• Malignant tumor involving an organ by direct extension from endometrium
• Malignant tumor involving an organ by direct extension from fallopian tube
• Malignant tumor involving an organ by direct extension from ovary
• Malignant tumor involving an organ by direct extension from prostate
• Malignant tumor involving an organ by direct extension from uterine cervix
• Malignant tumor involving an organ by direct extension from uterus
• Malignant tumor involving an organ by direct extension from vagina
• Malignant tumor of unknown origin
• Metastatic acantholytic squamous cell carcinoma
• Metastatic adenocarcinoma
• Metastatic adenocarcinoma of unknown origin
• Metastatic castration-resistant prostate cancer
• Metastatic clear cell renal cell carcinoma
• Metastatic collecting duct carcinoma
• Metastatic extraskeletal osteosarcoma
• Metastatic gastroesophageal adenocarcinoma
• Metastatic hepatocellular carcinoma
• Metastatic human epidermal growth factor 2 positive carcinoma of breast
• Metastatic malignant melanoma
• Metastatic malignant melanoma
• Metastatic malignant melanoma to skin
• Metastatic malignant melanoma with diffuse hypermelanosis
• Metastatic malignant neoplasm
• Metastatic malignant neoplasm to unknown site
• Metastatic neuroblastoma
• Metastatic pancreatic endocrine carcinoma
• Metastatic penile cancer
• Metastatic renal cell carcinoma
• Metastatic small cell carcinoma
• Metastatic squamous cell carcinoma
• Metastatic urothelial carcinoma
• Oligometastatic malignant neoplasm
• Pachymeningitis
• Pachymeningitis due to secondary malignant neoplastic disease
• Pathologic fracture of bone at site of metastatic neoplasm
• Stage III: Extraglandular extension of tumor without other organ involvement
• Stage III: Macroscopic invasion of neighboring organs
• Stage IV: Distant metastasis or extension into other organs
• Stage IVb: Hematogenous or lymphatic dissemination
• Thymic epithelial neoplasm stage finding
• Thymic epithelial neoplasm stage finding
• Tumor invades beyond pancreatic capsule to adjacent structures AND/OR organs
• Tumor invasion by direct extension from organ of origin to adjacent organ
• Tumor invasion by direct extension to other structures
• Tumor invasion into adjacent tissues
• Tumor of unknown origin
• Tumor of unknown origin

Diagnostic Related Group(s)

The code C79.9 is grouped in the following Diagnostic Related Group(s) (MS-DRG v39.0)

• Myeloproliferative Disorders Or Poorly Differentiated Neoplasms With Major O.r. Procedures With Mcc (826)
• Myeloproliferative Disorders Or Poorly Differentiated Neoplasms With Major O.r. Procedures With Cc (827)
• Myeloproliferative Disorders Or Poorly Differentiated Neoplasms With Major O.r. Procedures Without Cc/mcc (828)

References to Index of Diseases and Injuries

The code C79.9 has the following ICD-10-CM references to the Index of Diseases and Injuries

• Inclusion Terms:
  • Metastatic cancer NOS
  • Metastatic disease NOS
• Type 1 Excludes Notes:
  • carcinomatosis NOS (@C80.0*)
  • generalized cancer NOS (@C80.0*)
  • malignant (primary) neoplasm of unspecified site (@C80.1*)

Crosswalk Information

Similar Codes

This page was last updated on: 10/1/2023

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