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  5. H33
  6. 2024 ICD-10-CM Code H33.1
Version 2024
Non-Billable Code

2024 ICD-10-CM Diagnosis Code H33.1

Retinoschisis and retinal cysts

ICD-10-CM Code:
H33.1
ICD-10 Code for:
Retinoschisis and retinal cysts
Is Billable?
Not Valid for Submission
Code Navigator:

Code Classification

  • Diseases of the eye and adnexa
    (H00–H59)
    • Disorders of choroid and retina
      (H30-H36)
      • Retinal detachments and breaks
        (H33)

H33.1 is a non-specific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of retinoschisis and retinal cysts. The code is not specific and is NOT valid for the year 2024 for the submission of HIPAA-covered transactions. Category or Header define the heading of a category of codes that may be further subdivided by the use of 4th, 5th, 6th or 7th characters.

Specific Coding Applicable to Retinoschisis and retinal cysts

Non-specific codes like H33.1 require more digits to indicate the appropriate level of specificity. Consider using any of the following ICD-10-CM codes with a higher level of specificity when coding for retinoschisis and retinal cysts:

  • H33.10 for Unspecified retinoschisis - NON-BILLABLE CODE

  • Use H33.101 for Unspecified retinoschisis, right eye - BILLABLE CODE

  • Use H33.102 for Unspecified retinoschisis, left eye - BILLABLE CODE

  • Use H33.103 for Unspecified retinoschisis, bilateral - BILLABLE CODE

  • Use H33.109 for Unspecified retinoschisis, unspecified eye - BILLABLE CODE

  • H33.11 for Cyst of ora serrata - NON-BILLABLE CODE

  • Use H33.111 for Cyst of ora serrata, right eye - BILLABLE CODE

  • Use H33.112 for Cyst of ora serrata, left eye - BILLABLE CODE

  • Use H33.113 for Cyst of ora serrata, bilateral - BILLABLE CODE

  • Use H33.119 for Cyst of ora serrata, unspecified eye - BILLABLE CODE

  • H33.12 for Parasitic cyst of retina - NON-BILLABLE CODE

  • Use H33.121 for Parasitic cyst of retina, right eye - BILLABLE CODE

  • Use H33.122 for Parasitic cyst of retina, left eye - BILLABLE CODE

  • Use H33.123 for Parasitic cyst of retina, bilateral - BILLABLE CODE

  • Use H33.129 for Parasitic cyst of retina, unspecified eye - BILLABLE CODE

  • H33.19 for Other retinoschisis and retinal cysts - NON-BILLABLE CODE

  • Use H33.191 for Other retinoschisis and retinal cysts, right eye - BILLABLE CODE

  • Use H33.192 for Other retinoschisis and retinal cysts, left eye - BILLABLE CODE

  • Use H33.193 for Other retinoschisis and retinal cysts, bilateral - BILLABLE CODE

  • Use H33.199 for Other retinoschisis and retinal cysts, unspecified eye - BILLABLE CODE

Tabular List of Diseases and Injuries

The following annotation back-references are applicable to this diagnosis code. The Tabular List of Diseases and Injuries is a list of ICD-10-CM codes, organized "head to toe" into chapters and sections with coding notes and guidance for inclusions, exclusions, descriptions and more.


Type 1 Excludes

Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • congenital retinoschisis Q14.1
  • microcystoid degeneration of retina H35.42

Patient Education


Retinal Disorders

The retina is a layer of tissue in the back of your eye that senses light and sends images to your brain. In the center of this nerve tissue is the macula. It provides the sharp, central vision needed for reading, driving and seeing fine detail.

Retinal disorders affect this vital tissue. They can affect your vision, and some can be serious enough to cause blindness. Examples are:

  • Macular degeneration - a disease that destroys your sharp, central vision
  • Diabetic eye disease
  • Retinal detachment - a medical emergency, when the retina is pulled away from the back of the eye
  • Retinoblastoma - cancer of the retina. It is most common in young children.
  • Macular pucker - scar tissue on the macula
  • Macular hole - a small break in the macula that usually happens to people over 60
  • Floaters - cobwebs or specks in your field of vision

NIH: National Eye Institute


[Learn More in MedlinePlus]

Code History

  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016. This was the first year ICD-10-CM was implemented into the HIPAA code set.