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lung dx with lung mets

Kerri Posted Thu 19th of September, 2013 09:37:14 AM

If you have a dictation stating lung cancer and the dictation also states there are lung mets. Do you code the lung mets along with primary lung cancer. Or would it be coded as lung multiple sites?

SuperCoder Answered Thu 19th of September, 2013 14:07:16 PM

When the oncologist documents a primary right lower lobe neoplasm with metastasis to the left lung, you should report:

Right lobe: 162.5, Malignant neoplasm of lower lobe bronchus or lung
Left lung: 197.0, Secondary malignant neoplasm of lung.
Support: ICD-9 Coding Clinic (2010, vol. 27, no. 3) addressed a similar question in which the patient had been diagnosed with cancer of the left lower lobe and metastasis to the right lung, peritoneum, and liver. Coding Clinic stated proper coding would include 162.5 (lung primary), 197.0 (lung secondary), 197.6 (Secondary malignant neoplasm of retroperitoneum and peritoneum), and 197.7 (Malignant neoplasm of liver secondary).

Caution: Don't assume that the presence of a second neoplasm in the same organ system as a primary neoplasm means that you have both primary and secondary neoplasms. A patient may have two primary neoplasms in the same organ system. Let the documentation guide your choice.

ICD-10-CM: When ICD-10-CM becomes effective, 162.5 will be replaced by C34.3- (Malignant neoplasm of lower lobe ...) and 197.0 will translate to C78.0- (Secondary malignant neoplasm of ... lung). Your final code choice will depend on whether the lung is documented as left, right, or unspecified.

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