World Health Organization · 2026-01 · English
2F91 Neoplasms of unknown behaviour of middle ear, respiratory or intrathoracic organs
Official WHO ICD-11 MMS tabulation. This international classification is separate from US ICD-10-CM. For complete instructions and postcoordination, consult the WHO browser.
More specific codes
2F91.0Neoplasms of unknown behaviour of larynx2F91.1Neoplasms of unknown behaviour of trachea, bronchus or lung2F91.YNeoplasms of unknown behaviour of other specified respiratory organ, intrathoracic organ or middle ear2F91.ZNeoplasms of unknown behaviour of unspecified respiratory organ or intrathoracic organ© World Health Organization · CC BY-ND 3.0 IGO