ICD-10 Code H44.121 – Parasitic endophthalmitis, unspecified, right eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H44.121 – Parasitic endophthalmitis, unspecified, right eye
What it is
This code identifies parasitic inflammation inside the right eye, with the parasite type not specified in the record. Use it when documentation confirms the condition involves the right eye and no more specific organism is named.
Clinical signs
Clinical features vary; refer to documentation. Typical records may note intraocular inflammation with decreased vision, eye pain, redness, floaters, or exam findings consistent with endophthalmitis.
When to use this code
Use H44.121 when the provider documents parasitic endophthalmitis affecting the right eye and does not identify a more specific parasite or subtype. It is appropriate for confirmed diagnoses in ophthalmology or inpatient notes. If laterality is unclear or another eye is involved, check documentation before coding.
Do not use for
Do not use this code for nonparasitic endophthalmitis, uveitis without endophthalmitis, or conditions affecting the left eye or both eyes. If the record lacks right-eye specificity, check documentation.
Coding tip
Confirm both laterality and parasitic cause in the provider note before assigning H44.121.