2024 ICD-10-CM Table of Neoplasms for Anatomical Sites starting with "a"

The Table of Neoplasms by anatomical site includes the six possible ICD-10 codes for each anatomical site 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 2024 includes a complete listing of all anatomical sites starting with the letter "a"

Neoplasm, neoplastic Malignant
Primary
Malignant
Secondary
CaInSitu Benign Uncertain
Behavior
Unspecified
Behavior
»Neoplasm, neoplastic
  »abdomen, abdominal
C76.2C79.8D09.8D36.7D48.7D49.89
»Neoplasm, neoplastic
  »abdomen, abdominal
    »cavity
C76.2C79.8D09.8D36.7D48.7D49.89
»Neoplasm, neoplastic
  »abdomen, abdominal
    »organ
C76.2C79.8D09.8D36.7D48.7D49.89
»Neoplasm, neoplastic
  »abdomen, abdominal
    »viscera
C76.2C79.8D09.8D36.7D48.7D49.89
»Neoplasm, neoplastic
  »abdomen, abdominal
    »wall [See Also: Neoplasm, abdomen, wall, skin]
C44.509C79.2D04.5D23.5D48.5D49.2
»Neoplasm, neoplastic
  »abdomen, abdominal
    »wall [See Also: Neoplasm, abdomen, wall, skin]
      »connective tissue
C49.4C79.8 D21.4D48.1D49.2
»Neoplasm, neoplastic
  »abdomen, abdominal
    »wall [See Also: Neoplasm, abdomen, wall, skin]
      »skin
C44.519     
»Neoplasm, neoplastic
  »abdomen, abdominal
    »wall [See Also: Neoplasm, abdomen, wall, skin]
      »skin
        »basal cell carcinoma
C44.519     
»Neoplasm, neoplastic
  »abdomen, abdominal
    »wall [See Also: Neoplasm, abdomen, wall, skin]
      »skin
        »specified type NEC
C44.599     
»Neoplasm, neoplastic
  »abdomen, abdominal
    »wall [See Also: Neoplasm, abdomen, wall, skin]
      »skin
        »squamous cell carcinoma
C44.529     
»Neoplasm, neoplastic
  »abdominopelvic
C76.8C79.8 D36.7D48.7D49.89
»Neoplasm, neoplastic
  »accessory sinus
      
»Neoplasm, neoplastic
  »acoustic nerve
C72.4C79.49 D33.3D43.3D49.7
»Neoplasm, neoplastic
  »adenoid (pharynx) (tissue)
C11.1C79.89D00.08D10.6D37.05D49.0
»Neoplasm, neoplastic
  »adipose tissue [See Also: Neoplasm, connective tissue]
C49.4C79.89 D21.9D48.1D49.2
»Neoplasm, neoplastic
  »adnexa (uterine)
C57.4C79.89D07.39D28.7D39.8D49.59
»Neoplasm, neoplastic
  »adrenal
C74.9C79.7D09.3D35.0D44.1D49.7
»Neoplasm, neoplastic
  »adrenal
    »capsule
C74.9C79.7D09.3D35.0D44.1D49.7
»Neoplasm, neoplastic
  »adrenal
    »cortex
C74.0C79.7D09.3D35.0D44.1D49.7
»Neoplasm, neoplastic
  »adrenal
    »gland
C74.9C79.7D09.3D35.0D44.1D49.7
»Neoplasm, neoplastic
  »adrenal
    »medulla
C74.1C79.7D09.3D35.0D44.1D49.7
»Neoplasm, neoplastic
  »ala nasi (external) [See Also: Neoplasm, skin, nose]
C44.301C79.2D04.39D23.39D48.5D49.2
»Neoplasm, neoplastic
  »alimentary canal or tract NEC
C26.9C78.80D01.9D13.99D37.9D49.0
»Neoplasm, neoplastic
  »alveolar
C03.9C79.89D00.03D10.39D37.09D49.0
»Neoplasm, neoplastic
  »alveolar
    »mucosa
C03.9C79.89D00.03D10.39D37.09D49.0
»Neoplasm, neoplastic
  »alveolar
    »mucosa
      »lower
C03.1C79.89D00.03D10.39D37.09D49.0
»Neoplasm, neoplastic
  »alveolar
    »mucosa
      »upper
C03.0C79.89D00.03D10.39D37.09D49.0
»Neoplasm, neoplastic
  »alveolar
    »ridge or process
C41.1C79.51 D16.5D48.0D49.2
»Neoplasm, neoplastic
  »alveolar
    »ridge or process
      »carcinoma
C03.9C79.8    
»Neoplasm, neoplastic
  »alveolar
    »ridge or process
      »carcinoma
        »lower
C03.1C79.8    
»Neoplasm, neoplastic
  »alveolar
    »ridge or process
      »carcinoma
        »upper
C03.0C79.8    
»Neoplasm, neoplastic
  »alveolar
    »ridge or process
      »lower
C41.1C79.51 D16.5D48.0D49.2
»Neoplasm, neoplastic
  »alveolar
    »ridge or process
      »mucosa
C03.9C79.89D00.03D10.39D37.09D49.0
»Neoplasm, neoplastic
  »alveolar
    »ridge or process
      »mucosa
        »lower
C03.1C79.89D00.03D10.39D37.09D49.0
»Neoplasm, neoplastic
  »alveolar
    »ridge or process
      »mucosa
        »upper
C03.0C79.89D00.03D10.39D37.09D49.0
»Neoplasm, neoplastic
  »alveolar
    »ridge or process
      »upper
C41.0C79.51 D16.4D48.0D49.2
»Neoplasm, neoplastic
  »alveolar
    »sulcus
C06.1C79.89D00.02D10.39D37.09D49.0
»Neoplasm, neoplastic
  »alveolus
C03.9C79.89D00.03D10.39D37.09D49.0
»Neoplasm, neoplastic
  »alveolus
    »lower
C03.1C79.89D00.03D10.39D37.09D49.0
»Neoplasm, neoplastic
  »alveolus
    »upper
C03.0C79.89D00.03D10.39D37.09D49.0
»Neoplasm, neoplastic
  »ampulla of Vater
C24.1C78.89D01.5D13.5D37.6D49.0
»Neoplasm, neoplastic
  »ankle NEC
C76.5C79.89D04.7D36.7D48.7D49.89
»Neoplasm, neoplastic
  »anorectum, anorectal (junction)
C21.8C78.5D01.3D12.9D37.8D49.0
»Neoplasm, neoplastic
  »antecubital fossa or space
C76.4C79.89D04.6D36.7D48.7D49.89
»Neoplasm, neoplastic
  »antrum (Highmore) (maxillary)
C31.0C78.39D02.3D14.0D38.5D49.1
»Neoplasm, neoplastic
  »antrum (Highmore) (maxillary)
    »pyloric
C16.3C78.89D00.2D13.1D37.1D49.0
»Neoplasm, neoplastic
  »antrum (Highmore) (maxillary)
    »tympanicum
C30.1C78.39D02.3D14.0D38.5D49.1
»Neoplasm, neoplastic
  »anus, anal
C21.0C78.5D01.3D12.9D37.8D49.0
»Neoplasm, neoplastic
  »anus, anal
    »canal
C21.1C78.5D01.3D12.9D37.8D49.0
»Neoplasm, neoplastic
  »anus, anal
    »cloacogenic zone
C21.2C78.5D01.3D12.9D37.8D49.0
»Neoplasm, neoplastic
  »anus, anal
    »margin [See Also: Neoplasm, anus, skin]
C44.500C79.2D04.5D23.5D48.5D49.2
»Neoplasm, neoplastic
  »anus, anal
    »overlapping lesion with rectosigmoid junction or rectum
C21.8     
»Neoplasm, neoplastic
  »anus, anal
    »skin
C44.500C79.2D04.5D23.5D48.5D49.2
»Neoplasm, neoplastic
  »anus, anal
    »skin
      »basal cell carcinoma
C44.510     
»Neoplasm, neoplastic
  »anus, anal
    »skin
      »specified type NEC
C44.590     
»Neoplasm, neoplastic
  »anus, anal
    »skin
      »squamous cell carcinoma
C44.520     
»Neoplasm, neoplastic
  »anus, anal
    »sphincter
C21.1C78.5D01.3D12.9D37.8D49.0
»Neoplasm, neoplastic
  »aorta (thoracic)
C49.3C79.89 D21.3D48.1D49.2
»Neoplasm, neoplastic
  »aorta (thoracic)
    »abdominal
C49.4C79.89 D21.4D48.1D49.2
»Neoplasm, neoplastic
  »aortic body
C75.5C79.89 D35.6D44.7D49.7
»Neoplasm, neoplastic
  »aponeurosis
C49.9C79.89 D21.9D48.1D49.2
»Neoplasm, neoplastic
  »aponeurosis
    »palmar
C49.1C79.89 D21.1D48.1D49.2
»Neoplasm, neoplastic
  »aponeurosis
    »plantar
C49.2C79.89 D21.2D48.1D49.2
»Neoplasm, neoplastic
  »appendix
C18.1C78.5D01.0D12.1D37.3D49.0
»Neoplasm, neoplastic
  »arachnoid
C70.9C79.49 D32.9D42.9D49.7
»Neoplasm, neoplastic
  »arachnoid
    »cerebral
C70.0C79.32 D32.0D42.0D49.7
»Neoplasm, neoplastic
  »arachnoid
    »spinal
C70.1C79.49 D32.1D42.1D49.7
»Neoplasm, neoplastic
  »areola
C50.0C79.81D05.D24.D48.6D49.3
»Neoplasm, neoplastic
  »arm NEC
C76.4C79.89D04.6D36.7D48.7D49.89
»Neoplasm, neoplastic
  »artery
      
»Neoplasm, neoplastic
  »aryepiglottic fold
C13.1C79.89D00.08D10.7D37.05D49.0
»Neoplasm, neoplastic
  »aryepiglottic fold
    »hypopharyngeal aspect
C13.1C79.89D00.08D10.7D37.05D49.0
»Neoplasm, neoplastic
  »aryepiglottic fold
    »laryngeal aspect
C32.1C78.39D02.0D14.1D38.0D49.1
»Neoplasm, neoplastic
  »aryepiglottic fold
    »marginal zone
C13.1C79.89D00.08D10.7D37.05D49.0
»Neoplasm, neoplastic
  »arytenoid (cartilage)
C32.3C78.39D02.0D14.1D38.0D49.1
»Neoplasm, neoplastic
  »arytenoid (cartilage)
    »fold
      
»Neoplasm, neoplastic
  »associated with transplanted organ
C80.2     
»Neoplasm, neoplastic
  »atlas
C41.2C79.51 D16.6D48.0D49.2
»Neoplasm, neoplastic
  »atrium, cardiac
C38.0C79.89 D15.1D48.7D49.89
»Neoplasm, neoplastic
  »auditory
C44.20C79.2D04.2D23.2D48.5D49.2
»Neoplasm, neoplastic
  »auditory
    »canal (external) (skin)
C44.20C79.2D04.2D23.2D48.5D49.2
»Neoplasm, neoplastic
  »auditory
    »canal (external) (skin)
      »internal
C30.1C78.39D02.3D14.0D38.5D49.1
»Neoplasm, neoplastic
  »auditory
    »nerve
C72.4C79.49 D33.3D43.3D49.7
»Neoplasm, neoplastic
  »auditory
    »tube
C30.1C78.39D02.3D14.0D38.5D49.1
»Neoplasm, neoplastic
  »auditory
    »tube
      »opening
C11.2C79.89D00.08D10.6D37.05D49.0
»Neoplasm, neoplastic
  »auricle, ear [See Also: Neoplasm, skin, ear]
C44.20C79.2D04.2D23.2D48.5D49.2
»Neoplasm, neoplastic
  »auricular canal (external) [See Also: Neoplasm, skin, ear]
C44.20C79.2D04.2D23.2D48.5D49.2
»Neoplasm, neoplastic
  »auricular canal (external) [See Also: Neoplasm, skin, ear]
    »internal
C30.1C78.39D02.3D14.0D38.5D49.2
»Neoplasm, neoplastic
  »autonomic nerve or nervous system NEC (see Neoplasm, nerve, peripheral)
      
»Neoplasm, neoplastic
  »axilla, axillary
C76.1C79.89D09.8D36.7D48.7D49.89
»Neoplasm, neoplastic
  »axilla, axillary
    »fold [See Also: Neoplasm, skin, trunk]
C44.509C79.2D04.5D23.5D48.5D49.2