2023 ICD-10-CM Diagnosis Code D31.21

Benign neoplasm of right retina

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
  • D31.21 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2023 edition of ICD-10-CM D31.21 became effective on October 1, 2022.
  • This is the American ICD-10-CM version of D31.21 - other international versions of ICD-10 D31.21 may differ.
The following code(s) above D31.21 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 D31.21:
  • C00-D49
    2023 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).
  • D31
    ICD-10-CM Diagnosis Code D31

    Benign neoplasm of eye and adnexa

      2016 2017 2018 2019 2020 2021 2022 2023 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • benign neoplasm of connective tissue of eyelid (D21.0)
    • benign neoplasm of optic nerve (D33.3)
    • benign neoplasm of skin of eyelid (D22.1-, D23.1-)
    Benign neoplasm of eye and adnexa
  • D31.2
    ICD-10-CM Diagnosis Code D31.2

    Benign neoplasm of retina

      2016 2017 2018 2019 2020 2021 2022 2023 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • dark area on retina (D49.81)
    • hemangioma of retina (D49.81)
    • neoplasm of unspecified behavior of retina and choroid (D49.81)
    • retinal freckle (D49.81)
    Benign neoplasm of retina
Approximate Synonyms
  • Benign neoplasm of bilateral retina
  • Benign neoplasm, bilateral retina
  • Benign neoplasm, right retina
ICD-10-CM D31.21 is grouped within Diagnostic Related Group(s) (MS-DRG v40.0):
  • 124 Other disorders of the eye with mcc
  • 125 Other disorders of the eye without mcc

Convert D31.21 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
  • 2022 (effective 10/1/2021): No change
  • 2023 (effective 10/1/2022): No change
ICD-10-CM Codes Adjacent To D31.21
D31.0 Benign neoplasm of conjunctiva
D31.00 Benign neoplasm of unspecified conjunctiva
D31.01 Benign neoplasm of right conjunctiva
D31.02 Benign neoplasm of left conjunctiva
D31.1 Benign neoplasm of cornea
D31.10 Benign neoplasm of unspecified cornea
D31.11 Benign neoplasm of right cornea
D31.12 Benign neoplasm of left cornea
D31.2 Benign neoplasm of retina
D31.20 Benign neoplasm of unspecified retina
D31.21 Benign neoplasm of right retina
D31.22 Benign neoplasm of left retina
D31.3 Benign neoplasm of choroid
D31.30 Benign neoplasm of unspecified choroid
D31.31 Benign neoplasm of right choroid
D31.32 Benign neoplasm of left choroid
D31.4 Benign neoplasm of ciliary body
D31.40 Benign neoplasm of unspecified ciliary body
D31.41 Benign neoplasm of right ciliary body
D31.42 Benign neoplasm of left ciliary body
D31.5 Benign neoplasm of lacrimal gland and duct

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