B05.81 ICD-10-CM Code: Measles keratitis and keratoconjunctivitis
HCC Buddy Code Card
Digital ICD-10 code-book layout with official code detail, always-visible risk models, Code Trumping, and Buddy coding guidance.
FY 2026 Apr update / Certain infectious and parasitic diseases (A00-B99) / Viral infections characterized by skin and mucous membrane lesions (B00-B09)
B05.81
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceMeasles keratitis and keratoconjunctivitis
Measles infection that has caused inflammation of the cornea and the membrane covering the white part of the eye.
CMS-HCC V28
N/A—
Not mapped
CMS-HCC V24
N/A—
Not mapped
ACA/HHS
N/A—
Not mapped
ESRD/PACE
N/A—
Not mapped
RXHCC
N/A—
Not mapped
Code Book Path
Inclusion Terms
OfficialICD-10-CM does not list inclusion terms for B05.81 in this effective period.
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for B05.81 in this effective period.
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for B05.81 in this effective period.
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for B05.81 in this effective period.
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for B05.81 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for B05.81 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for B05.81 in this effective period.
Buddy Documentation Tip
Current with CMS: FY2026 ICD-10-CM Apr 1 update (effective Apr 1 – Sep 30, 2026) · CMS-HCC V28, 100% phased in for payment year 2026. FY2027 code set already staged for October 1, 2026. How HCC Buddy stays current →
Is B05.81 an HCC code?
No. B05.81 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
- Code
- B05.81
- Description
- Measles keratitis and keratoconjunctivitis
- HCC (V28)
- No CMS-HCC V28 mapping
- RAF
- —
- Billable
- Yes
- Payment year
- 2026
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
B05.81 is the ICD-10-CM diagnosis code for measles keratitis and keratoconjunctivitis. Measles infection that has caused inflammation of the cornea and the membrane covering the white part of the eye. B05.81 sits in the ICD-10-CM chapter for certain infectious and parasitic diseases (a00-b99), within the section covering viral infections characterized by skin and mucous membrane lesions (b00-b09).
B05.81 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.
Document whether keratitis, keratoconjunctivitis, or both conditions are present.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for B05.81 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Document whether keratitis, keratoconjunctivitis, or both conditions are present
- •Note if vision is affected or if scarring occurs