ICD-10-CM 2027
ICD-10 code for left chalazion
From the official ICD-10-CM alphabetic index entry “Chalazion › left”. Page updated September 29, 2026.
About coding left chalazion
The ICD-10-CM code for left chalazion is H00.16 (Chalazion left eye, unspecified eyelid). The official index lists 2 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on H00.16.
Within H00.1, choose H00.16 (left eye, unspecified eyelid) only when documentation doesn't support a more specific option: right upper eyelid (H00.11), right lower eyelid (H00.12), right eye, unspecified eyelid (H00.13), left upper eyelid (H00.14), left lower eyelid (H00.15) and unspecified eye, unspecified eyelid (H00.19).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 124 (Other Disorders of the Eye with MCC or Thrombolytic Agent, relative weight 1.2471) and DRG 125 (Other Disorders of the Eye without MCC, relative weight 0.7702), in MDC 02 (Diseases and Disorders of the Eye), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific left chalazion codes (official index)
Common questions about left chalazion ICD-10 codes
What is the ICD-10 code for left chalazion?
- H00.16 — Chalazion left eye, unspecified eyelid. More specific codes apply when the documentation supports them: H00.15, H00.14.
What is the ICD-10 code for lower left chalazion?
- H00.15 — Chalazion left lower eyelid.
What is the ICD-10 code for upper left chalazion?
- H00.14 — Chalazion left upper eyelid.
Is H00.16 billable?
- Yes. H00.16 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can H00.16 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict H00.16 as a principal diagnosis.
Is H00.16 a CC or MCC?
- No. H00.16 is neither a CC nor an MCC under MS-DRG v44.0.