H33.12
Non-billableParasitic cyst of retina
H33.12 is the ICD-10-CM code for Parasitic cyst of retina. It is a non-billable category code — use a more specific child code such as H33.121 for billing.
H00-H59 Diseases of the eye and adnexa
What this means — in plain language
MedlinePlus · NIHParasites are living things that use other living things - like your body - for food and a place to live. You can get them from contaminated food or water, a bug bite, or sexual contact. Some parasitic diseases are easily treated and some are not. Parasites range in size from tiny, one-celled organisms called protozoa to worms that can be seen with the naked eye. Some parasitic diseases occur in the United States.…
Read more about Parasitic Diseases at MedlinePlus ↗Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.
Conditions mapped to this code
MedlinePlus · NIHPlain-language health-topic references grounded in MedlinePlus (NIH/NLM).
Frequently asked questions
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
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