H16.3
⚠ Non-billable
Interstitial and deep keratitis
ICD-10-CM · FY2026 · Diseases of the Eye and Adnexa
Code
H16.3
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 H16.3?
ICD-10-CM code H16.3 represents Interstitial and deep keratitis. 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 H16.3 billable?
No. H16.3 is a non-billable header. Select a more specific subcategory for claims submission.
What chapter is H16.3 in?
H16.3 belongs to the Diseases of the Eye and Adnexa chapter (H00–H59) of ICD-10-CM.
Related codes in the H16 category
H16
Keratitis
Non-billable
H16.0
Corneal ulcer
Non-billable
H16.1
Other and unspecified superficial keratitis without conjunctivitis
Non-billable
H16.2
Keratoconjunctivitis
Non-billable
H16.4
Corneal neovascularization
Non-billable
H16.8
Other keratitis
Billable
H16.9
Unspecified keratitis
Billable
H16.00
Unspecified corneal ulcer
Non-billable
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