2021

  1. ICD-10-CM Codes
    2. ›
  2. C00-D49 Neoplasms
    3. ›
  3. C76-C80 Malignant neoplasms of ill-defined, other secondary and unspecified sites
    4. ›
  4. C78- Secondary malignant neoplasm of respiratory and digestive organs
    5. ›
  5. 2021 ICD-10-CM Diagnosis Code C78.4

2021 ICD-10-CM Diagnosis Code C78.4

Secondary malignant neoplasm of small intestine

    2016 2017 2018 2019 2020 2021 Billable/Specific Code
  • C78.4 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2021 edition of ICD-10-CM C78.4 became effective on October 1, 2020.
  • This is the American ICD-10-CM version of C78.4 - other international versions of ICD-10 C78.4 may differ.
The following code(s) above C78.4 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to C78.4:
  • C00-D49
    2021 ICD-10-CM Range C00-D49

    Neoplasms

    Note
    • Functional activity
    • All neoplasms are classified in this chapter, whether they are functionally active or not. An additional code from Chapter 4 may be used, to identify functional activity associated with any neoplasm.
    • Morphology [Histology]
    • Chapter 2 classifies neoplasms primarily by site (topography), with broad groupings for behavior, malignant, in situ, benign, etc. The Table of Neoplasms should be used to identify the correct topography code. In a few cases, such as for malignant melanoma and certain neuroendocrine tumors, the morphology (histologic type) is included in the category and codes.
    • Primary malignant neoplasms overlapping site boundaries
    • A primary malignant neoplasm that overlaps two or more contiguous (next to each other) sites should be classified to the subcategory/code .8 ('overlapping lesion'), unless the combination is specifically indexed elsewhere. For multiple neoplasms of the same site that are not contiguous, such as tumors in different quadrants of the same breast, codes for each site should be assigned.
    • Malignant neoplasm of ectopic tissue
    • Malignant neoplasms of ectopic tissue are to be coded to the site mentioned, e.g., ectopic pancreatic malignant neoplasms are coded to pancreas, unspecified (C25.9).
    Neoplasms
  • C78
    ICD-10-CM Diagnosis Code C78

    Secondary malignant neoplasm of respiratory and digestive organs

      2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • secondary carcinoid tumors of liver (C7B.02)
    • secondary carcinoid tumors of peritoneum (C7B.04)
    Type 2 Excludes
    • lymph node metastases (C77.0)
    Secondary malignant neoplasm of respiratory and digestive organs
Approximate Synonyms
  • Cancer metastatic to duodenum
  • Cancer metastatic to small intestine
  • Secondary malignant neoplasm of duodenum
Clinical Information
  • The spread of cancer to the small intestine. This may be from a primary intestinal cancer, or from a cancer at a distant site.
  • The spread of the cancer to the small intestine. This may be from a primary intestinal cancer, or from a cancer at a distant site.
ICD-10-CM C78.4 is grouped within Diagnostic Related Group(s) (MS-DRG v38.0):
  • 374 Digestive malignancy with mcc
  • 375 Digestive malignancy with cc
  • 376 Digestive malignancy without cc/mcc

Convert C78.4 to ICD-9-CM

Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
  • 2021 (effective 10/1/2020): No change
ICD-10-CM Codes Adjacent To C78.4
C78 Secondary malignant neoplasm of respiratory and digestive organs
C78.0 Secondary malignant neoplasm of lung
C78.00 Secondary malignant neoplasm of unspecified lung
C78.01 Secondary malignant neoplasm of right lung
C78.02 Secondary malignant neoplasm of left lung
C78.1 Secondary malignant neoplasm of mediastinum
C78.2 Secondary malignant neoplasm of pleura
C78.3 Secondary malignant neoplasm of other and unspecified respiratory organs
C78.30 Secondary malignant neoplasm of unspecified respiratory organ
C78.39 Secondary malignant neoplasm of other respiratory organs
C78.4 Secondary malignant neoplasm of small intestine
C78.5 Secondary malignant neoplasm of large intestine and rectum
C78.6 Secondary malignant neoplasm of retroperitoneum and peritoneum
C78.7 Secondary malignant neoplasm of liver and intrahepatic bile duct
C78.8 Secondary malignant neoplasm of other and unspecified digestive organs
C78.80 Secondary malignant neoplasm of unspecified digestive organ
C78.89 Secondary malignant neoplasm of other digestive organs
C79 Secondary malignant neoplasm of other and unspecified sites
C79.0 Secondary malignant neoplasm of kidney and renal pelvis
C79.00 Secondary malignant neoplasm of unspecified kidney and renal pelvis
C79.01 Secondary malignant neoplasm of right kidney and renal pelvis

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.

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