C34.90 — Malignant neoplasm of unspecified part of unspecified bronchus or lung
C34.90 is a billable, specific ICD-10-CM code for malignant neoplasm of unspecified part of unspecified bronchus or lung. It is valid for submission on a claim.
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Lung cancer NOS
Risk adjustment
C34.90 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:
- HCC 20 Lung and Other Severe Cancers1.136 RAF
Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score.
Medicare coverage
C34.90 is named in 69 Medicare coverage policies — 69 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A52370Billing and Coding: Bevacizumab and biosimilars
- A52450Billing and Coding: Paclitaxel (e.g., Taxol®/Abraxane ™)
- A52450Billing and Coding: Paclitaxel (e.g., Taxol®/Abraxane ™)
- A52479Oral Anticancer Drugs - Policy Article
How C34.90 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to C34.90.
- Carcinoma›oat cell›unspecified site
- Carcinoma›large cell›small cell›unspecified site
- Carcinoma›small cell›fusiform cell›unspecified site
- Carcinoma›small cell›intermediate cell›unspecified site
- Carcinoma›small cell›large cell›unspecified site
Related codes at this level
Codes that share C34.9. If C34.90 is not quite right, the correct code is usually one of these.
Questions about C34.90
- Is C34.90 a billable ICD-10-CM code?
- Yes. C34.90 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does C34.90 sit in the tabular list?
- Neoplasms (C00-D49), in the block Malignant neoplasms of respiratory and intrathoracic organs (C30-C39).