2023

  1. ICD-10-CM Codes
    2. ›
  2. C00-D49
    3. ›
  3. C76-C80
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  4. C78-
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  5. 2023 ICD-10-CM Diagnosis Code C78.00

2023 ICD-10-CM Diagnosis Code C78.00

Secondary malignant neoplasm of unspecified lung

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
  • C78.00 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2023 edition of ICD-10-CM C78.00 became effective on October 1, 2022.
  • This is the American ICD-10-CM version of C78.00 - other international versions of ICD-10 C78.00 may differ.
The following code(s) above C78.00 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 C78.00:
  • C00-D49
    2023 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 2022 2023 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 lung
  • Cancer metastatic to lung undifferentiated lg cell
  • Cancer metastatic to lung, adenocarcinoma
  • Cancer metastatic to lung, small cell
  • Cancer metastatic to lung, squamous cell
  • Cancer of the thyroid, with metastasis to lungs
  • Melanoma eye, metastatic to lung
  • Melanoma eye, metastatic to pancreas
  • Melanoma, metastatic to lung
  • Metastasis to lung from adenocarcinoma
  • Secondary adenocarcinoma of lung
  • Secondary malignant melanoma of lung
  • Secondary malignant melanoma of lung from eye
  • Secondary malignant melanoma of pancreas from eye
  • Secondary malignant neoplasm of lung
  • Secondary malignant neoplasm of lungs from thyroid
  • Secondary small cell cancer of lung
  • Secondary squamous cell carcinoma of lung
  • Secondary undifferentiated large cell malignant neoplasm of lung
ICD-10-CM C78.00 is grouped within Diagnostic Related Group(s) (MS-DRG v40.0):
  • 180 Respiratory neoplasms with mcc
  • 181 Respiratory neoplasms with cc
  • 182 Respiratory neoplasms without cc/mcc

Convert C78.00 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
  • 2022 (effective 10/1/2021): No change
  • 2023 (effective 10/1/2022): No change
ICD-10-CM Codes Adjacent To C78.00
C77.0 Secondary and unspecified malignant neoplasm of lymph nodes of head, face and neck
C77.1 Secondary and unspecified malignant neoplasm of intrathoracic lymph nodes
C77.2 Secondary and unspecified malignant neoplasm of intra-abdominal lymph nodes
C77.3 Secondary and unspecified malignant neoplasm of axilla and upper limb lymph nodes
C77.4 Secondary and unspecified malignant neoplasm of inguinal and lower limb lymph nodes
C77.5 Secondary and unspecified malignant neoplasm of intrapelvic lymph nodes
C77.8 Secondary and unspecified malignant neoplasm of lymph nodes of multiple regions
C77.9 Secondary and unspecified malignant neoplasm of lymph node, unspecified
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

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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