H16.002 Unspecified corneal ulcer, left eye

✓ Billable ICD-10-CM 2026
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The ICD-10-CM code for Unspecified corneal ulcer, left eye is H16.002 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Section
H15-H22: Disorders of sclera, cornea, iris and ciliary body (H15-H22)
Category H16
163 codes (126 billable)
FY2026 Status
Stable since FY2024

U.S. Hospital Utilization

  • An estimated 1,420 U.S. inpatient stays in 2023 included H16.002 among the documented diagnoses.
  • 410 stays listed it as the principal diagnosis.

Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.

Official Coding Guidelines

Glaucoma (TOC entry)

a. Glaucoma .............................................................................................................................. 48

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.7.a
Assigning glaucoma codes (use as many H40 codes as needed)

Assign as many codes from category H40, Glaucoma, as needed to identify the type of glaucoma, the affected eye, and the glaucoma stage.

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.7.a.1

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

Related Codes

Parent Code

H16 Keratitis

Related Codes in H16

H16 Keratitis H16.0 Corneal ulcer H16.00 Unspecified corneal ulcer H16.001 Unspecified corneal ulcer, right eye H16.003 Unspecified corneal ulcer, bilateral H16.009 Unspecified corneal ulcer, unspecified eye H16.01 Central corneal ulcer H16.011 Central corneal ulcer, right eye H16.012 Central corneal ulcer, left eye H16.013 Central corneal ulcer, bilateral H16.019 Central corneal ulcer, unspecified eye H16.02 Ring corneal ulcer H16.021 Ring corneal ulcer, right eye H16.022 Ring corneal ulcer, left eye H16.023 Ring corneal ulcer, bilateral H16.029 Ring corneal ulcer, unspecified eye H16.03 Corneal ulcer with hypopyon H16.031 Corneal ulcer with hypopyon, right eye H16.032 Corneal ulcer with hypopyon, left eye H16.033 Corneal ulcer with hypopyon, bilateral
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Reviewed by Prajwal Shrestha, CPC, CRC
Certified Professional Coder (CPC) and Certified Risk Adjustment Coder (CRC) · AAPC Member ID 01997614 · About · Editorial policy · Content last reviewed: 2025-10-01

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