A57

Chancroid

Billable FY2026 2025-10-01 → 2026-09-30

Exclusions 8 never code together

A50-A64block

Excludes1

nonspecific and nongonococcal urethritis (N34.1)N34.1
Reiter's disease (M02.3-)M02.3-

Excludes2

human immunodeficiency virus [HIV] disease (B20)B20

A00-B99chapter

Excludes1

certain localized infections - see body system-related chapters

Excludes2

carrier or suspected carrier of infectious disease (Z22.-)Z22.-
infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)O98.-
infectious and parasitic diseases specific to the perinatal period (P35-P39)P35-P39
influenza and other acute respiratory infections (J00-J22)J00-J22

Excludes1 — never code together. The excluded condition and this one are mutually exclusive.

Excludes2 — not included here, but the patient may have both. Code both when documented.

Instructional notes 3

A57code

Inclusion terms

Ulcus molle

A00-B99chapter

Includes

diseases generally recognized as communicable or transmissible

Use additional code

code to identify resistance to antimicrobial drugs (Z16.-)Z16.-

Index entries leading here 20

Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic) L02.91
- phagedenic NOS L02.91
  - chancroid A57
Adenitis — see also Lymphadenitis
- chancroid (Hemophilus ducreyi) A57
Infection, infected, infective (opportunistic) B99.9
- Bacillus A49.9
  - ducreyi (any location) A57
- Hemophilus
  - ducreyi (any location) A57
- ducreyi Haemophilus (any location) A57
- inguinal (lymph) glands L04.1
  - due to soft chancre A57
Balanitis (circinata) (erosiva) (gangrenosa) (phagedenic) (vulgaris) N48.1
- due to Haemophilus ducreyi A57
Chancre (any genital site) (hard) (hunterian) (mixed) (primary) (seronegative) (seropositive) (syphilitic) A51.0
- soft A57
  - bubo A57
- Nisbet's A57
- phagedenic A57
- simple A57
- Ducrey's A57
- ducreyi A57
Bubo I88.8
- inguinal (nonspecific) I88.8
  - chancroidal A57
  - due to H. ducreyi A57
- soft chancre A57
- virulent (chancroidal) A57
- chancroidal A57
- due to Haemophilus ducreyi A57
Disease, diseased — see also Syndrome
- sexually transmitted A64
  - chancroid A57
Phimosis (congenital) (due to infection) N47.1
- chancroidal A57
Lymphangitis I89.1
- chancroidal A57
Ulcer, ulcerated, ulcerating, ulceration, ulcerative
- chancroidal A57
Paraphimosis (congenital) N47.2
- chancroidal A57
Lymphadenitis I88.9
- chancroidal (congenital) A57
Chancroid (anus) (genital) (penis) (perineum) (rectum) (urethra) (vulva) A57
Ducreyi chancre A57
Ducrey's chancre A57
Vulvitis (acute) (allergic) (atrophic) (hypertrophic) (intertriginous) (senile) N76.2
- due to Haemophilus ducreyi A57
Ulcus — see also Ulcer
- molle (cutis) (skin) A57
Nisbet's chancre A57
Sore
- soft A57
Virulent bubo A57

Medications 1

20 Chancroid drugs

MED-RT files conditions by MeSH, which carves the world differently from ICD-10. These are name matches on this code's description, offered as candidates — not as an assertion that they are this code.

Additional references

AHA Coding Clinic® Licence required

Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.

Risk adjustment

Maps to no condition category in any loaded model.

Presence is a property of the code. Untick a model to hide it everywhere.

This code

Billable: yes
Code set: FY2026
Block: A50-A64

Present FY2024–FY2027.