A18.10 ICD-10-CM Code: Tuberculosis of genitourinary system, unspecified
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FY 2026 Apr update / Certain infectious and parasitic diseases (A00-B99) / Tuberculosis (A15-A19)
A18.10
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceTuberculosis of genitourinary system, unspecified
This code describes a tuberculosis infection affecting the genitourinary system (kidneys, bladder, reproductive organs) when the specific location is not documented. Tuberculosis is a serious bacterial infection that typically spreads through the lungs but can affect other body systems.
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
OfficialICD-10-CM does not list inclusion terms for A18.10 in this effective period.
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for A18.10 in this effective period.
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for A18.10 in this effective period.
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for A18.10 in this effective period.
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for A18.10 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for A18.10 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for A18.10 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 A18.10 an HCC code?
No. A18.10 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
A18.10 is the ICD-10-CM diagnosis code for tuberculosis of genitourinary system, unspecified. This code describes a tuberculosis infection affecting the genitourinary system (kidneys, bladder, reproductive organs) when the specific location is not documented. Tuberculosis is a serious bacterial infection that typically spreads through the lungs but can affect other body systems. A18.10 sits in the ICD-10-CM chapter for certain infectious and parasitic diseases (a00-b99), within the section covering tuberculosis (a15-a19).
A18.10 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.
Query the provider if a more specific site is documented (such as A18.11 for tuberculosis of kidney and ureter, or A18.12 for tuberculosis of bladder), as this unspecified code should only be used when the exact location cannot be determined.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for A18.10 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Query the provider if a more specific site is documented (such as A18.11 for tuberculosis of kidney and ureter, or A18.12 for tuberculosis of bladder), as this unspecified code should only be used when the exact location cannot be determined
- •Ensure the patient has confirmed tuberculosis diagnosis and that this is not just a positive TB test; tuberculosis of the genitourinary system requires evidence of active disease in that organ system