H18.009 ICD-10-CM Code: Unspecified corneal deposit, unspecified eye
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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)
H18.009
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceUnspecified corneal deposit, unspecified eye
This code describes an abnormal substance or material that has accumulated on the cornea (the clear front part of the eye), but the specific type of deposit and which eye is affected are not specified. The corneal deposit may affect vision and requires further evaluation to determine its exact nature.
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
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Inclusion Terms
OfficialICD-10-CM does not list inclusion terms for H18.009 in this effective period.
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for H18.009 in this effective period.
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for H18.009 in this effective period.
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for H18.009 in this effective period.
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for H18.009 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for H18.009 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for H18.009 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 H18.009 an HCC code?
No. H18.009 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
H18.009 is the ICD-10-CM diagnosis code for unspecified corneal deposit, unspecified eye. This code describes an abnormal substance or material that has accumulated on the cornea (the clear front part of the eye), but the specific type of deposit and which eye is affected are not specified. The corneal deposit may affect vision and requires further evaluation to determine its exact nature. H18.009 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).
H18.009 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 when the documentation does not specify the type of corneal deposit (such as crystalline, lipid, or pigmented) or when the laterality (left, right, or bilateral) cannot be determined from the medical record.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for H18.009 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Use this code only when the documentation does not specify the type of corneal deposit (such as crystalline, lipid, or pigmented) or when the laterality (left, right, or bilateral) cannot be determined from the medical record.
- •If the type of deposit or the specific eye is documented, assign a more specific code from the H18.00- subcategory (such as H18.001 for right eye, H18.002 for left eye, or H18.003 for bilateral) to improve coding accuracy and specificity.