2021 ICD-10-CM Diagnosis Code H33.321

Round hole, right eye

    2016 2017 2018 2019 2020 2021 Billable/Specific Code
  • H33.321 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 H33.321 became effective on October 1, 2020.
  • This is the American ICD-10-CM version of H33.321 - other international versions of ICD-10 H33.321 may differ.
The following code(s) above H33.321 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 H33.321:
  • H00-H59
    2021 ICD-10-CM Range H00-H59

    Diseases of the eye and adnexa

    • Use an external cause code following the code for the eye condition, if applicable, to identify the cause of the eye condition
    Type 2 Excludes
    • certain conditions originating in the perinatal period (P04-P96)
    • certain infectious and parasitic diseases (A00-B99)
    • complications of pregnancy, childbirth and the puerperium (O00-O9A)
    • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
    • diabetes mellitus related eye conditions (E09.3-, E10.3-, E11.3-, E13.3-)
    • endocrine, nutritional and metabolic diseases (E00-E88)
    • injury (trauma) of eye and orbit (S05.-)
    • injury, poisoning and certain other consequences of external causes (S00-T88)
    • neoplasms (C00-D49)
    • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
    • syphilis related eye disorders (A50.01, A50.3-, A51.43, A52.71)
    Diseases of the eye and adnexa
  • H33
    ICD-10-CM Diagnosis Code H33

    Retinal detachments and breaks

      2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
    Type 1 Excludes
    Retinal detachments and breaks
  • H33.3
    ICD-10-CM Diagnosis Code H33.3

    Retinal breaks without detachment

      2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • chorioretinal scars after surgery for detachment (H59.81-)
    • peripheral retinal degeneration without break (H35.4-)
    Retinal breaks without detachment
Approximate Synonyms
  • R retina round hole
  • Right retinal round hole
  • Right round hole
  • Round hole of retina of right eye
ICD-10-CM H33.321 is grouped within Diagnostic Related Group(s) (MS-DRG v38.0):
  • 124 Other disorders of the eye with mcc
  • 125 Other disorders of the eye without mcc

Convert H33.321 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 H33.321
H33.301 …… right eye
H33.302 …… left eye
H33.303 …… bilateral
H33.309 …… unspecified eye
H33.31 Horseshoe tear of retina without detachment
H33.311 …… right eye
H33.312 …… left eye
H33.313 …… bilateral
H33.319 …… unspecified eye
H33.32 Round hole of retina without detachment
H33.321 Round hole, right eye
H33.322 Round hole, left eye
H33.323 Round hole, bilateral
H33.329 Round hole, unspecified eye
H33.33 Multiple defects of retina without detachment
H33.331 …… right eye
H33.332 …… left eye
H33.333 …… bilateral
H33.339 …… unspecified eye
H33.4 Traction detachment of retina
H33.40 …… unspecified eye

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