2020 ICD-10-CM Table of Neoplasms for Anatomical Sites starting with "o"

The Table of Neoplasms by anatomical site. For each site there are six possible code numbers according to whether the neoplasm in question is malignant, benign, in situ, of uncertain behavior, or of unspecified nature. The description of the neoplasm will often indicate which of the six columns is appropriate.

Where such descriptors are not present, the remainder of the Index should be consulted where guidance is given to the appropriate column for each morphological (histological) variety listed. However, the guidance in the Index can be overridden if one of the descriptors mentioned above is present.

For coding neoplasms identify the solid organ or tissue and then assign the correct histological behavior which could be Benign, In situ, Malignant, Primary, Secondary, Uncertain Behavior or Unspecified. The Tabular Index must be reviewed for the complete diagnosis code.

The following ICD-10-CM table of neoplasms effective for the fiscal year 2020 includes a complete listing of all anatomical sites starting with the letter "o"

Neoplasm, neoplastic Malignant
Primary
Malignant
Secondary
CaInSitu Benign Uncertain
Behavior
Unspecified
Behavior
»occipital
C41.0C79.51D16.4D48.0D49.2
»occipital
  »bone
C41.0C79.51D16.4D48.0D49.2
»occipital
  »lobe or pole, brain
C71.4C79.31D33.0D43.0D49.6
»odontogenic
»olfactory nerve or bulb
C72.2C79.49D33.3D43.3D49.7
»olive (brain)
C71.7C79.31D33.1D43.1D49.6
»omentum
C48.1C78.6D20.1D48.4D49.0
»operculum (brain)
C71.0C79.31D33.0D43.0D49.6
»optic nerve, chiasm, or tract
C72.3C79.49D33.3D43.3D49.7
»oral (cavity)
C06.9C79.89D00.00D10.30D37.09D49.0
»oral (cavity)
  »ill-defined
C14.8C79.89D00.00D10.30D37.09D49.0
»oral (cavity)
  »mucosa
C06.0C79.89D00.02D10.39D37.09D49.0
»orbit
C69.6C79.49D09.2D31.6D48.7D49.89
»orbit
  »autonomic nerve
C69.6C79.49D31.6D48.7D49.2
»orbit
  »bone
C41.0C79.51D16.4D48.0D49.2
»orbit
  »eye
C69.6C79.49D09.2D31.6D48.7D49.89
»orbit
  »peripheral nerves
C69.6C79.49D31.6D48.7D49.2
»orbit
  »soft parts
C69.6C79.49D09.2D31.6D48.7D49.89
»organ of Zuckerkandl
C75.5C79.89D35.6D44.7D49.7
»oropharynx
C10.9C79.89D00.08D10.5D37.05D49.0
»oropharynx
  »branchial cleft (vestige)
C10.4C79.89D00.08D10.5D37.05D49.0
»oropharynx
  »junctional region
C10.8C79.89D00.08D10.5D37.05D49.0
»oropharynx
  »lateral wall
C10.2C79.89D00.08D10.5D37.05D49.0
»oropharynx
  »overlapping lesion
C10.8
»oropharynx
  »pillars or fauces
C09.1C79.89D00.08D10.5D37.05D49.0
»oropharynx
  »posterior wall
C10.3C79.89D00.08D10.5D37.05D49.0
»oropharynx
  »vallecula
C10.0C79.89D00.08D10.5D37.05D49.0
»os
C53.1C79.82D06.1D26.0D39.0D49.59
»os
  »external
C53.1C79.82D06.1D26.0D39.0D49.59
»os
  »internal
C53.0C79.82D06.0D26.0D39.0D49.59
»ovary
C56.C79.6D07.39D27.D39.1D49.59
»oviduct
C57.0C79.82D07.39D28.2D39.8D49.59