F55.0 ICD-10-CM Code: Abuse of antacids
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 / Mental, Behavioral and Neurodevelopmental disorders (F01-F99) / Behavioral syndromes associated with physiological disturbances and physical factors (F50-F59)
F55.0
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceAbuse of antacids
Excessive or inappropriate use of antacid medications, often taken in larger amounts or more frequently than medically recommended, leading to dependence or harmful effects.
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 F55.0 in this effective period.
Excludes 2
Official- abuse of psychoactive substances (F10-F19)
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for F55.0 in this effective period.
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for F55.0 in this effective period.
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for F55.0 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for F55.0 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for F55.0 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 F55.0 an HCC code?
No. F55.0 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
F55.0 is the ICD-10-CM diagnosis code for abuse of antacids. Excessive or inappropriate use of antacid medications, often taken in larger amounts or more frequently than medically recommended, leading to dependence or harmful effects. F55.0 sits in the ICD-10-CM chapter for mental, behavioral and neurodevelopmental disorders (f01-f99), within the section covering behavioral syndromes associated with physiological disturbances and physical factors (f50-f59).
F55.0 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.
Document the specific type of antacid being abused and the pattern of misuse.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for F55.0 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Document the specific type of antacid being abused and the pattern of misuse
- •Consider documenting any resulting complications such as electrolyte imbalances or gastrointestinal issues