H18.552 ICD-10-CM Code: Macular corneal dystrophy, left 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)
H18.552
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceMacular corneal dystrophy, left eye
A hereditary corneal condition where deposits accumulate in the central cornea of the left eye, causing progressive clouding and vision loss.
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 H18.552 in this effective period.
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for H18.552 in this effective period.
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for H18.552 in this effective period.
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for H18.552 in this effective period.
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for H18.552 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for H18.552 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for H18.552 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 H18.552 an HCC code?
No. H18.552 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
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This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).
What This Code Means
H18.552 is the ICD-10-CM diagnosis code for macular corneal dystrophy, left eye. A hereditary corneal condition where deposits accumulate in the central cornea of the left eye, causing progressive clouding and vision loss. H18.552 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).
H18.552 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.
Confirm 'macular' type is documented to distinguish from granular or lattice dystrophies.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for H18.552 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.