A27.0 ICD-10-CM Code: Leptospirosis icterohemorrhagica
HCC Buddy Code Card
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FY 2026 Apr update / Certain infectious and parasitic diseases (A00-B99) / Certain zoonotic bacterial diseases (A20-A28)
A27.0
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceLeptospirosis icterohemorrhagica
This is a severe form of leptospirosis, a bacterial infection transmitted through contaminated water or animal urine, characterized by jaundice (yellowing of skin and eyes) and bleeding. It represents the most serious presentation of this disease and can affect multiple organ systems including the liver and kidneys.
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
Code Trumping
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Code Book Path
Inclusion Terms
Official- Leptospiral or spirochetal jaundice (hemorrhagic)
- Weil's disease
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for A27.0 in this effective period.
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for A27.0 in this effective period.
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for A27.0 in this effective period.
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for A27.0 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for A27.0 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for A27.0 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 A27.0 an HCC code?
No. A27.0 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
A27.0 is the ICD-10-CM diagnosis code for leptospirosis icterohemorrhagica. This is a severe form of leptospirosis, a bacterial infection transmitted through contaminated water or animal urine, characterized by jaundice (yellowing of skin and eyes) and bleeding. It represents the most serious presentation of this disease and can affect multiple organ systems including the liver and kidneys. A27.0 sits in the ICD-10-CM chapter for certain infectious and parasitic diseases (a00-b99), within the section covering certain zoonotic bacterial diseases (a20-a28).
A27.0 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 the clinical documentation confirms both the jaundice (icterus) and hemorrhagic manifestations before assigning this code, as milder forms of leptospirosis use different codes.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for A27.0 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Verify the clinical documentation confirms both the jaundice (icterus) and hemorrhagic manifestations before assigning this code, as milder forms of leptospirosis use different codes
- •This code should be paired with additional codes to specify any complications such as acute kidney injury, hepatic failure, or pulmonary hemorrhage if documented