ICD-10 Code H04.312 – Phlegmonous dacryocystitis of left lacrimal passage (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H04.312 – Phlegmonous dacryocystitis of left lacrimal passage
What it is
This code identifies an acute, suppurative infection of the left lacrimal sac or tear drainage passage. Use it when documentation specifies phlegmonous dacryocystitis on the left side.
Clinical signs
Typical findings include painful swelling, redness, and tenderness near the inner corner of the left eye. Pus or discharge from the punctum may be noted; clinical features vary, so refer to documentation.
When to use this code
Use H04.312 when the provider documents phlegmonous dacryocystitis affecting the left lacrimal passage. It is appropriate for encounters where the diagnosis is confirmed clinically or recorded in the assessment. If laterality is not stated, check documentation before coding.
Do not use for
Do not use this code for right-sided or unspecified dacryocystitis, or for noninfectious tear duct obstruction. Check documentation if the record only says “dacryocystitis” without laterality or type.
Coding tip
Match both the infection type and laterality exactly as documented before assigning H04.312.