C39.9
Billable codeMalignant neoplasm of lower respiratory tract, part unspecified
The ICD-10 code for malignant neoplasm of lower respiratory tract, part unspecified is C39.9.
Clinical notes
Also known as
Alternate wording, synonyms, or specific conditions that fall under this code, listed to help confirm you've picked the right one.
- Malignant neoplasm of respiratory tract NOS
Documentation support
General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.
- •As a general rule, code to the highest level of specificity supported by the documentation in the medical record.
Related codes in this category
- C39.0Malignant neoplasm of upper respiratory tract, part unspecified
- C39.9Malignant neoplasm of lower respiratory tract, part unspecified
ICD-9-CM equivalent
Informational only — GEM mappings are approximate, not guaranteed one-to-one equivalents. Verify before use in billing.
- 1658Approximate match
- 1659Approximate match
Associated MS-DRGs
C39.9 can serve as the principal diagnosis for these Medicare Severity Diagnosis-Related Groups.
Informational only — actual DRG assignment also depends on procedures, complications/comorbidities (CC/MCC), discharge status, and payer-specific rules not reflected here.