A01.09 ICD-10-CM Code: Typhoid fever with other complications
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) / Intestinal infectious diseases (A00-A09)
A01.09
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceTyphoid fever with other complications
Typhoid fever is a serious bacterial infection spread through contaminated food or water that causes high fever and can affect multiple body systems. This code is used when typhoid fever occurs with complications other than the more common ones like intestinal perforation or myocarditis.
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
Official- Infection due to Salmonella typhi
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for A01.09 in this effective period.
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for A01.09 in this effective period.
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for A01.09 in this effective period.
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for A01.09 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for A01.09 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for A01.09 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 A01.09 an HCC code?
No. A01.09 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
Coder workflow notes
Get the V28 RAF + MEAT cheat sheet
One printable page: confirm a code's V28 HCC status, its RAF weight, and the MEAT your note needs to make it stick. Free, no card.
Free PDF. No card. Unsubscribe anytime.
This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).
What This Code Means
A01.09 is the ICD-10-CM diagnosis code for typhoid fever with other complications. Typhoid fever is a serious bacterial infection spread through contaminated food or water that causes high fever and can affect multiple body systems. This code is used when typhoid fever occurs with complications other than the more common ones like intestinal perforation or myocarditis. A01.09 sits in the ICD-10-CM chapter for certain infectious and parasitic diseases (a00-b99), within the section covering intestinal infectious diseases (a00-a09).
A01.09 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.
Always verify the specific complication documented by the physician, as A01.09 is used only when complications don't fit the more specific subcategories (A01.01 for intestinal perforation, A01.02 for myocarditis, A01.03 for pneumonia, A01.04 for encephalopathy).
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for A01.09 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Always verify the specific complication documented by the physician, as A01.09 is used only when complications don't fit the more specific subcategories (A01.01 for intestinal perforation, A01.02 for myocarditis, A01.03 for pneumonia, A01.04 for encephalopathy)
- •This code requires documentation of both the typhoid fever diagnosis and the additional complication; query the provider if complications are mentioned but not clearly specified