ICD-10 Diagnosis Code C79.9

Secondary malignant neoplasm of unspecified site

Diagnosis Code C79.9

ICD-10: C79.9
Short Description: Secondary malignant neoplasm of unspecified site
Long Description: Secondary malignant neoplasm of unspecified site
This is the 2018 version of the ICD-10-CM diagnosis code C79.9

Valid for Submission
The code C79.9 is valid for submission for HIPAA-covered transactions.

Code Classification
  • Neoplasms (C00–D48)
    • Malignant neoplasms of ill-defined, other secondary and unspecified sites (C76-C80)
      • Secondary malignant neoplasm of other and unspecified sites (C79)

Information for Medical Professionals

Diagnostic Related Groups
The diagnosis code C79.9 is grouped in the following Diagnostic Related Group(s) (MS-DRG V34.0)

  • 826 - MYELOPROLIFERATIVE DISORDERS OR POORLY DIFFERENTIATED NEOPLASMS WITH MAJOR O.R. PROCEDURE WITH MCC
  • 827 - MYELOPROLIFERATIVE DISORDERS OR POORLY DIFFERENTIATED NEOPLASMS WITH MAJOR O.R. PROCEDURE WITH CC
  • 828 - MYELOPROLIFERATIVE DISORDERS OR POORLY DIFFERENTIATED NEOPLASMS WITH MAJOR O.R. PROCEDURE WITHOUT CC/MCC
  • 829 - MYELOPROLIFERATIVE DISORDERS OR POORLY DIFFERENTIATED NEOPLASMS WITH OTHER PROCEDURE WITH CC/MCC
  • 830 - MYELOPROLIFERATIVE DISORDERS OR POORLY DIFFERENTIATED NEOPLASMS WITH OTHER PROCEDURE WITHOUT CC/MCC

Convert to ICD-9 Additional informationCallout TooltipGeneral Equivalence Map
The ICD-10 and ICD-9 GEMs are used to facilitate linking between the diagnosis codes in ICD-9-CM and the new ICD-10-CM code set. The GEMs are the raw material from which providers, health information vendors and payers can derive specific applied mappings to meet their needs.

Synonyms
  • Hypermelanosis due to neoplasia
  • 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 involving an organ by separate metastasis from bladder
  • Malignant tumor involving an organ by separate metastasis from endometrium
  • Malignant tumor involving an organ by separate metastasis from fallopian tube
  • Malignant tumor involving an organ by separate metastasis from ovary
  • Malignant tumor involving an organ by separate metastasis from prostate
  • Malignant tumor involving an organ by separate metastasis from uterine cervix
  • Malignant tumor involving an organ by separate metastasis from uterus
  • Malignant tumor involving an organ by separate metastasis from vagina
  • Malignant tumor of unknown origin
  • Malignant tumor of unknown origin or ill-defined site
  • Metastasis from malignant melanoma of skin
  • Metastasis from malignant tumor of adrenal gland
  • Metastasis from malignant tumor of bladder
  • Metastasis from malignant tumor of bone
  • Metastasis from malignant tumor of breast
  • Metastasis from malignant tumor of bronchus
  • Metastasis from malignant tumor of buccal cavity
  • Metastasis from malignant tumor of cervix
  • Metastasis from malignant tumor of colon
  • Metastasis from malignant tumor of esophagus
  • Metastasis from malignant tumor of gallbladder
  • Metastasis from malignant tumor of kidney
  • Metastasis from malignant tumor of liver
  • Metastasis from malignant tumor of lung
  • Metastasis from malignant tumor of pancreas
  • Metastasis from malignant tumor of prostate
  • Metastasis from malignant tumor of rectum
  • Metastasis from malignant tumor of skin
  • Metastasis from malignant tumor of soft tissues
  • Metastasis from malignant tumor of stomach
  • Metastasis from malignant tumor of thyroid
  • Metastasis from malignant tumor of tongue
  • Metastasis from malignant tumor of uterus
  • Metastasis to soft tissue of unknown primary
  • Metastatic adenocarcinoma of unknown origin
  • Metastatic malignant melanoma
  • Metastatic malignant melanoma with diffuse hypermelanosis
  • Metastatic neuroblastoma
  • Metastatic squamous cell carcinoma
  • Neoplasm of colon distant metastasis staging category M1: Distant metastasis
  • Neoplasm of colon distant metastasis staging category M1a: Metastasis confine to one organ or site
  • Neoplasm of colon distant metastasis staging category M1b: Metastasis in more than one organ or site or peritoneum
  • Neoplasm of prostate distant metastasis staging category M1: Distant metastasis
  • Neoplasm of prostate distant metastasis staging category M1a: Metastasis to nonregional lymph node
  • Neoplasm of prostate distant metastasis staging category M1c: Distant metastasis with or without metastasis to bone
  • Neuroblastoma
  • Pathological fracture due to metastatic bone disease
  • Secondary malignant neoplasm of unknown site
  • Secondary malignant neoplastic disease
  • 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 or ill-defined site

Index of Diseases and Injuries
References found for the code C79.9 in the Index of Diseases and Injuries:


Table of Neoplasms

The code C79.9 is included in the table of neoplasms by anatomical site. For each site there are six possible code numbers according to whether the neoplasm in question is malignant, benign, in situ, of uncertain behavior, or of unspecified nature. The description of the neoplasm will often indicate which of the six columns is appropriate.

Where such descriptors are not present, the remainder of the Index should be consulted where guidance is given to the appropriate column for each morphological (histological) variety listed. However, the guidance in the Index can be overridden if one of the descriptors mentioned above is present.

The Tabular must be reviewed for the complete diagnosis code.

Neoplasm, neoplastic Malignant
Primary
Malignant
Secondary
CaInSitu Benign Uncertain
Behavior
Unspecified
Behavior
»metastatic NEC [See Also: Neoplasm, by site, secondary]
C79.9
»unknown site or unspecified
C80.1C79.9D09.9D36.9D48.9D49.9

Information for Patients


Cancer

Also called: Carcinoma, Malignancy, Neoplasms, Tumor

Cancer begins in your cells, which are the building blocks of your body. Normally, your body forms new cells as you need them, 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. These extra cells can form a mass called a tumor. Tumors can be benign or malignant. Benign tumors aren't cancer while malignant ones are. Cells from malignant tumors can invade nearby tissues. They can also break away and spread to other parts of the body.

Cancer is not just one disease but many diseases. There are more than 100 different types of cancer. Most cancers are named for where they start. For example, lung cancer starts in the lung, and breast cancer starts in the breast. The spread of cancer from one part of the body to another is called metastasis. Symptoms and treatment depend on the cancer type and how advanced it is. Most treatment plans may include surgery, radiation and/or chemotherapy. Some may involve hormone therapy, immunotherapy or other types of biologic therapy, or stem cell transplantation.

NIH: National Cancer Institute

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