2021 ICD-10-CM Diagnosis Code D33.4

Benign neoplasm of spinal cord

    2016 2017 2018 2019 2020 2021 Billable/Specific Code
  • D33.4 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2021 edition of ICD-10-CM D33.4 became effective on October 1, 2020.
  • This is the American ICD-10-CM version of D33.4 - other international versions of ICD-10 D33.4 may differ.
The following code(s) above D33.4 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to D33.4:
  • C00-D49
    2021 ICD-10-CM Range C00-D49


    • Functional activity
    • All neoplasms are classified in this chapter, whether they are functionally active or not. An additional code from Chapter 4 may be used, to identify functional activity associated with any neoplasm.
    • Morphology [Histology]
    • Chapter 2 classifies neoplasms primarily by site (topography), with broad groupings for behavior, malignant, in situ, benign, etc. The Table of Neoplasms should be used to identify the correct topography code. In a few cases, such as for malignant melanoma and certain neuroendocrine tumors, the morphology (histologic type) is included in the category and codes.
    • Primary malignant neoplasms overlapping site boundaries
    • A primary malignant neoplasm that overlaps two or more contiguous (next to each other) sites should be classified to the subcategory/code .8 ('overlapping lesion'), unless the combination is specifically indexed elsewhere. For multiple neoplasms of the same site that are not contiguous, such as tumors in different quadrants of the same breast, codes for each site should be assigned.
    • Malignant neoplasm of ectopic tissue
    • Malignant neoplasms of ectopic tissue are to be coded to the site mentioned, e.g., ectopic pancreatic malignant neoplasms are coded to pancreas, unspecified (C25.9).
  • D33
    ICD-10-CM Diagnosis Code D33

    Benign neoplasm of brain and other parts of central nervous system

      2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • angioma (D18.0-)
    • benign neoplasm of meninges (D32.-)
    • benign neoplasm of peripheral nerves and autonomic nervous system (D36.1-)
    • hemangioma (D18.0-)
    • neurofibromatosis (Q85.0-)
    • retro-ocular benign neoplasm (D31.6-)
    Benign neoplasm of brain and other parts of central nervous system
Approximate Synonyms
  • Benign neoplasm of spinal intradural extramedullary space
  • Benign neoplasm of spinal intradural intramedullary space
  • Benign neoplasm of spinal intradural space
  • Benign neoplasm spine, intradural
  • Benign neoplasm spine, intramedullary
  • Benign neoplasm, intradural spinal, extramedullary
  • Schwannoma of spinal cord
Clinical Information
  • A benign growth of the cells that comprise the spinal cord.
  • A primary, non-invasive neoplasm without metastatic potential affecting the spinal cord. Representative examples include dermoid cyst, lipoma, and neurofibroma.
ICD-10-CM D33.4 is grouped within Diagnostic Related Group(s) (MS-DRG v38.0):
  • 054 Nervous system neoplasms with mcc
  • 055 Nervous system neoplasms without mcc

Convert D33.4 to ICD-9-CM

Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
  • 2021 (effective 10/1/2020): No change
ICD-10-CM Codes Adjacent To D33.4
D31.92 Benign neoplasm of unspecified part of left eye
D32 Benign neoplasm of meninges
D32.0 Benign neoplasm of cerebral meninges
D32.1 Benign neoplasm of spinal meninges
D32.9 Benign neoplasm of meninges, unspecified
D33 Benign neoplasm of brain and other parts of central nervous system
D33.0 Benign neoplasm of brain, supratentorial
D33.1 Benign neoplasm of brain, infratentorial
D33.2 Benign neoplasm of brain, unspecified
D33.3 Benign neoplasm of cranial nerves
D33.4 Benign neoplasm of spinal cord
D33.7 Benign neoplasm of other specified parts of central nervous system
D33.9 Benign neoplasm of central nervous system, unspecified
D34 Benign neoplasm of thyroid gland
D35 Benign neoplasm of other and unspecified endocrine glands
D35.0 Benign neoplasm of adrenal gland
D35.00 Benign neoplasm of unspecified adrenal gland
D35.01 Benign neoplasm of right adrenal gland
D35.02 Benign neoplasm of left adrenal gland
D35.1 Benign neoplasm of parathyroid gland
D35.2 Benign neoplasm of pituitary gland

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.