H10.522 ICD-10-CM Code: Angular blepharoconjunctivitis, left eye
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FY 2026 Apr update / Diseases of the eye and adnexa (H00-H59) / Disorders of conjunctiva (H10-H11)
H10.522
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceAngular blepharoconjunctivitis, left eye
Angular blepharoconjunctivitis is an inflammation of the eyelid and conjunctiva (the clear membrane covering the white part of the eye) that typically occurs at the angles or corners of the eye, specifically affecting the left eye in this case. This condition often causes redness, irritation, and discharge in the affected eye.
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 H10.522 in this effective period.
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for H10.522 in this effective period.
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for H10.522 in this effective period.
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for H10.522 in this effective period.
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for H10.522 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for H10.522 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for H10.522 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 H10.522 an HCC code?
No. H10.522 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
H10.522 is the ICD-10-CM diagnosis code for angular blepharoconjunctivitis, left eye. Angular blepharoconjunctivitis is an inflammation of the eyelid and conjunctiva (the clear membrane covering the white part of the eye) that typically occurs at the angles or corners of the eye, specifically affecting the left eye in this case. This condition often causes redness, irritation, and discharge in the affected eye. H10.522 sits in the ICD-10-CM chapter for diseases of the eye and adnexa (h00-h59), within the section covering disorders of conjunctiva (h10-h11).
H10.522 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.
Ensure laterality is documented in the medical record as 'left eye' to support the use of the fifth character '2' in this code.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for H10.522 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Ensure laterality is documented in the medical record as 'left eye' to support the use of the fifth character '2' in this code
- •Verify that the diagnosis specifies angular blepharoconjunctivitis rather than other forms of conjunctivitis, as different subtypes have distinct codes (H10.521 for right eye, H10.523 for bilateral)