H18.23
⚠ Non-billable
Secondary corneal edema
ICD-10-CM · FY2026 · Diseases of the Eye and Adnexa
Code
H18.23
System
ICD-10-CM
Billable
No — use specific code
Effective
FY2026
Chapter
Diseases of the Eye and Adnexa
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Frequently asked questions
What is ICD-10 code H18.23?
ICD-10-CM code H18.23 represents Secondary corneal edema. It is a non-billable header code requiring a more specific subcategory in the Diseases of the Eye and Adnexa chapter, effective October 1, 2025 – September 30, 2026.
Is H18.23 billable?
No. H18.23 is a non-billable header. Select a more specific subcategory for claims submission.
What chapter is H18.23 in?
H18.23 belongs to the Diseases of the Eye and Adnexa chapter (H00–H59) of ICD-10-CM.
Related codes in the H18 category
H18
Other disorders of cornea
Non-billable
H18.0
Corneal pigmentations and deposits
Non-billable
H18.1
Bullous keratopathy
Non-billable
H18.2
Other and unspecified corneal edema
Non-billable
H18.3
Changes of corneal membranes
Non-billable
H18.4
Corneal degeneration
Non-billable
H18.5
Hereditary corneal dystrophies
Non-billable
H18.6
Keratoconus
Non-billable
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