Icd 10 code for primary lung cancer

There are basic differences between the structure of ICD-O and that of ICD. In Chapter II (Neoplasm) of ICD, the topography code describes the behavior of the neoplasm (malignant, benign, in situ, or uncertain whether malignant or benign) by assigning it to a specific range of codes identifying each of these types of behavior. As a result, in ICD-10, five different categories of four characters each are needed to describe all lung neoplasms (see Figure 2). Very few histological types are identified in ICD. For example, there is no way in ICD to distinguish between an adenocarcinoma of the lung and a squamous cell carcinoma of the lung: both would be coded to C34.9.

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What is the ICD

Figure 2. ICD-10 Alphabetic Index Entry for Lung NeoplasmsMalignantSecondary or MetastaticIn situBenignUncertain and UnknownLungC34.9C78.0D02.2D14.3D38.1

The ICD-10 alphabetic index (Vol.3) contains, under the term "neoplasm," a table of five columns with the following headings: Malignant, Secondary or Metastatic, In situ, Benign, Uncertain and Unknown Behavior. Appropriate ICD-10 categories for each site of the body are then listed in alphabetic order. Figure 2 shows the entry for lung neoplasms.

In contrast, ICD-O uses only one set of four characters for topography (based on the malignant neoplasm section of ICD-10); the topography code (C34.9, lung) remains the same for all neoplasms of that site. The behavior code, incorporated as the fifth digit in the morphology field, identifies whether the neoplasm is malignant, benign, and so forth. (See Behavior Code) ICD-O also describes the type or morphology of the neoplasm, as shown in Figure 3; an adenocarcinoma of the lung would thus be coded C34.9, M-8140/3, and a squamous cell carcinoma of the lung C34.9, M8070/3.

Figure 3. ICD-O Coding of Lung NeoplasmsLung NeoplasmTopography CodeBehavior CodeMalignant neoplasm of the lung (such as carcinoma)C34.9M-8010/3Metastatic neoplasm of the lung (such as metastatic seminoma from the testis)C34.9M-9061/6In situ neoplasm of the lung (such as squamous carcinoma in situ)C34.9M-8070/2Benign neoplasm of lung (such as adenoma)C34.9M-8140/0Uncertain behavior of neoplasm of lung (such as carcinoid of uncertain behavior)C34.9M-8240/1

Figure 4 shows the correspondence between the behavior code of ICD-O and the different sections of Chapter II of ICD-10.

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