H44.412 ICD-10-CM Code: Flat anterior chamber hypotony of left eye
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FY 2026 Apr update / Diseases of the eye and adnexa (H00-H59) / Disorders of vitreous body and globe (H43-H44)
H44.412
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceFlat anterior chamber hypotony of left eye
A condition where the left eye has abnormally low internal pressure, causing the front chamber of the eye to become flattened, which can affect vision and eye structure.
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 H44.412 in this effective period.
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for H44.412 in this effective period.
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for H44.412 in this effective period.
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for H44.412 in this effective period.
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for H44.412 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for H44.412 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for H44.412 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 H44.412 an HCC code?
No. H44.412 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
Coder workflow notes
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This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).
What This Code Means
H44.412 is the ICD-10-CM diagnosis code for flat anterior chamber hypotony of left eye. A condition where the left eye has abnormally low internal pressure, causing the front chamber of the eye to become flattened, which can affect vision and eye structure. H44.412 sits in the ICD-10-CM chapter for diseases of the eye and adnexa (h00-h59), within the section covering disorders of vitreous body and globe (h43-h44).
H44.412 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.
Verify laterality is specifically documented as left eye in the medical record.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for H44.412 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Verify laterality is specifically documented as left eye in the medical record
- •Distinguish from other hypotony causes - this code specifies flat anterior chamber as the mechanism