S00.242A — External constrict of left eyelid and periocular area, init

S00.242A is the ICD-10-CM 2025 code for External constrict of left eyelid and periocular area, init. External constriction of left eyelid and periocular area, initial encounter. ICD-10-CM is the medical coding system used by clinicians, hospitals and insurers worldwide to classify diseases and conditions in a standard way.

Yes, S00.242A is a billable / specific ICD-10-CM code, meaning it can be used by clinicians and hospitals as a primary or secondary diagnosis on claims and electronic health records.

S00.242A belongs to the chapter "Injury, poisoning and certain other consequences of external causes" (codes S00-T88). ICD-10-CM organises codes into 22 chapters by body system or condition type, which helps clinicians navigate related diagnoses.

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