2026 ICD-10-CM Diagnosis Code F55.0Abuse of antacids

ICD-10-CM Codes›F01–F99›F50-F59›F55

ICD-10-CM F55.0
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

F55.0 is a billable ICD-10-CM diagnosis code for abuse of antacids. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 894 through 897. Coders also document this condition as episode of harmful use of antacid. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Miscellaneous mental and behavioral disorders/conditions.

Code Identity

ICD-10-CM Code
F55.0
Billable Status
Yes — Valid for Submission
Code Describes
Abuse of antacids
Short Description
Abuse of antacids
Same as the full description in the CMS dataset.
Parent Code
F55
Abuse of non-psychoactive substances

Code Classification

ChapterF01–F99Mental and behavioural disorders
SectionF50-F59Behavioral syndromes associated with physiological disturbances and physical factors
CategoryF55Abuse of non-psychoactive substances
This CodeF55.0Abuse of antacids

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Episode of harmful use of antacid
  • Harmful pattern of use of antacid

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Abuse
      • antacids
    • Abuse
      • drug NEC (non-dependent)
        • antacids
    • Abuse
      • non-psychoactive substance NEC
        • antacids

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR MBD013
Miscellaneous mental and behavioral disorders/conditions
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Drug Use and Addiction

Drugs are chemical substances that can change how your body and mind work. They include prescription medicines, over-the-counter medicines, alcohol, tobacco, and illegal drugs.

The full article covers:

  • What are drugs?
  • What is drug use?
  • What is drug addiction?
  • Does everyone who takes drugs become addicted?
  • Who is at risk for drug addiction?
  • What are the signs that someone has a drug problem?
  • What are the treatments for drug addiction?
  • Can drug use and addiction be prevented?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert F55.0 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
305.90 Drug abuse NEC-unspec
Approximate The match is approximate rather than exact.
ICD-9-CM
305.91 Drug abuse NEC-contin
Approximate The match is approximate rather than exact.
ICD-9-CM
305.92 Drug abuse NEC-episodic
Approximate The match is approximate rather than exact.
ICD-9-CM
305.93 Drug abuse NEC-in remiss
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About F55.0Overview

Is F55.0 (Abuse of non-psychoactive substances) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report abuse of antacids on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does F55.0 group to?

When abuse of antacids is the principal diagnosis on an inpatient stay, it groups to MS-DRG 894, 895, 896, 897, with relative weights from 0.6169 to 1.7451 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of F55.0?

Under the General Equivalence Mappings, abuse of antacids converts to ICD-9-CM 305.90 (drug abuse NEC-unspec), 305.91 (drug abuse NEC-contin), and 305.92 (drug abuse NEC-episodic). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.