ICD-10 Code H04.311 – Phlegmonous dacryocystitis of right lacrimal passage (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H04.311 – Phlegmonous dacryocystitis of right lacrimal passage
What it is
H04.311 identifies a phlegmonous infection and inflammation of the right lacrimal sac and drainage passage. Use it when documentation specifies the right side and this acute, spreading soft-tissue infection.
Clinical signs
Typical findings include painful swelling near the inner corner of the right eye, redness, tenderness, and tearing. Purulent discharge or reflux from the lacrimal sac may be documented; clinical features vary, refer to documentation.
When to use this code
Use this code when the provider documents phlegmonous dacryocystitis affecting the right lacrimal passage, including the lacrimal sac. It is appropriate for confirmed right-sided disease in outpatient, emergency, or inpatient records. If laterality is not stated, check documentation.
Do not use for
Do not use this code for left-sided, bilateral, or unspecified dacryocystitis. Do not use it for simple tearing, blocked tear duct, or nonphlegmonous inflammation unless the record specifically supports this diagnosis.
Coding tip
Verify laterality and the exact wording “phlegmonous dacryocystitis” before assigning H04.311.