H16.8 ICD-10-CM Code: Other keratitis
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FY 2026 Apr update / Diseases of the eye and adnexa (H00-H59) / Disorders of sclera, cornea, iris and ciliary body (H15-H22)
H16.8
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceOther keratitis
This code describes inflammation of the cornea (the clear front part of the eye) that doesn't fit into other specific keratitis categories. It's used when a patient has corneal inflammation from various causes like chemical burns, radiation exposure, or other non-standard conditions.
CMS-HCC V28
00
RAF 0
CMS-HCC V24
00
RAF 0
ACA/HHS
00
RAF 0
ESRD/PACE
00
RAF 0
RXHCC
00
RAF 0
Code Trumping
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Code Book Path
Inclusion Terms
OfficialICD-10-CM does not list inclusion terms for H16.8 in this effective period.
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for H16.8 in this effective period.
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for H16.8 in this effective period.
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for H16.8 in this effective period.
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for H16.8 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for H16.8 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for H16.8 in this effective period.
Buddy Documentation Tip
Last updated: FY2026 ICD-10-CM Apr update, Apr 1, 2026 through Sep 30, 2026. CMS-HCC V28 is 100% phased in for payment year 2026.
Is H16.8 an HCC code?
No. H16.8 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).
What This Code Means
H16.8 is the ICD-10-CM diagnosis code for other keratitis. This code describes inflammation of the cornea (the clear front part of the eye) that doesn't fit into other specific keratitis categories. It's used when a patient has corneal inflammation from various causes like chemical burns, radiation exposure, or other non-standard conditions. H16.8 sits in the ICD-10-CM chapter for diseases of the eye and adnexa (h00-h59), within the section covering disorders of sclera, cornea, iris and ciliary body (h15-h22).
H16.8 is a billable ICD-10-CM code but does not map to a payment HCC under the CMS-HCC V28, V24, ESRD, or RxHCC risk adjustment models. It can be reported on Medicare Advantage encounter data submissions but it does not contribute to a beneficiary's RAF score and therefore does not affect risk-adjusted payments to the plan.
Use this code only after excluding more specific keratitis types (such as bacterial, viral, or fungal keratitis) - it's a catch-all category for atypical corneal inflammation.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for H16.8 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Use this code only after excluding more specific keratitis types (such as bacterial, viral, or fungal keratitis) - it's a catch-all category for atypical corneal inflammation
- •Always review the clinical documentation to identify the underlying cause of the keratitis, as this may require an additional code to fully describe the condition and its etiology