A57 Chancroid

The ICD-10-CM code for Chancroid is A57 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Chapter

1: Certain infectious and parasitic diseases (A00-B99)

Section

A50-A64: Infections with a predominantly sexual mode of transmission (A50-A64)

Category A57

1 code (1 billable)

FY2026 Status

Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to A57:

• Chancroid (anus) (genital) (penis) (perineum) (rectum) (urethra) (vulva)
• Ducrey's chancre
• Virulent bubo
• Nisbet's chancre
• Ducreyi chancre
• Bubo › virulent (chancroidal)
• Adenitis › chancroid (Hemophilus ducreyi)
• Balanitis (circinata) (erosiva) (gangrenosa) (phagedenic) (vulgaris) › due to Haemophilus ducreyi

Inclusion Terms

• Ulcus molle

U.S. Hospital Utilization

• An estimated 120 U.S. inpatient stays in 2023 included A57 among the documented diagnoses.

Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.

Official Coding Guidelines

HIV Infections (TOC entry)

a. Human Immunodeficiency Virus (HIV) Infections .............................................................. 19

Infectious agents causing diseases in other chapters (TOC)

b. Infectious agents as the cause of diseases classified to other chapters ................................. 22

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

• CMS — ICD-10-CM Official Code Set and Guidelines, FY2026
• CDC/NCHS — ICD-10-CM Files and Browser Tool
• AHRQ — HCUP National Inpatient Sample, Frequencies by Diagnosis Code (2016–2023)