DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

A57 diagnosis code · Billable category · FY2027

A57 Chancroid

  • Billable
  • Not CC/MCC
  • POA reported

A57 ICD-10 code: a billable diagnosis code in FY2027; the category has no subdivisions.

Where it sits

  1. Chapter 1 Certain infectious and parasitic diseases (A00-B99)
  2. A50-A64 Infections with a predominantly sexual mode of transmission (A50-A64)
  3. A57 Chancroid
CC / MCC
Neither
MS-DRG
727-728, 742-743, 757-759
HCC V28
–
POA
Reported
Code Editor
–
Index entries
34

Instructions

At A57

Inclusion terms

  • Ulcus molle

Notes that also apply

Block A50-A64 instructions (Excludes1 2, Excludes2 1): printed on the block page.

Chapter 1 instructions (Includes 1, Excludes2 5, Use additional code 1): printed on the chapter 1 page.

Index entries

  • Chancroid (anus) (genital) (penis) (perineum) (rectum) (urethra) (vulva) → A57
  • Ducreyi chancre → A57
  • Ducrey's chancre → A57
  • Nisbet's chancre → A57
  • Virulent bubo → A57
  • Adenitischancroid (Hemophilus ducreyi) → A57
  • Balanitis (circinata) (erosiva) (gangrenosa) (phagedenic) (vulgaris)due to Haemophilus ducreyi → A57
  • Bubochancroidal → A57
  • Bubodue to Haemophilus ducreyi → A57
  • Bubosoft chancre → A57
  • Bubovirulent (chancroidal) → A57
  • Chancre (any genital site) (hard) (hunterian) (mixed) (primary) (seronegative) (seropositive) (syphilitic)ducreyi → A57
  • Chancre (any genital site) (hard) (hunterian) (mixed) (primary) (seronegative) (seropositive) (syphilitic)Ducrey's → A57
  • Chancre (any genital site) (hard) (hunterian) (mixed) (primary) (seronegative) (seropositive) (syphilitic)Nisbet's → A57
  • Chancre (any genital site) (hard) (hunterian) (mixed) (primary) (seronegative) (seropositive) (syphilitic)phagedenic → A57
  • Chancre (any genital site) (hard) (hunterian) (mixed) (primary) (seronegative) (seropositive) (syphilitic)simple → A57
  • Chancre (any genital site) (hard) (hunterian) (mixed) (primary) (seronegative) (seropositive) (syphilitic)soft → A57
  • Infection, infected, infective (opportunistic)ducreyi Haemophilus (any location) → A57
  • Lymphadenitischancroidal (congenital) → A57
  • Lymphangitischancroidal → A57
  • Paraphimosis (congenital)chancroidal → A57
  • Phimosis (congenital) (due to infection)chancroidal → A57
  • Soresoft → A57
  • Ulcer, ulcerated, ulcerating, ulceration, ulcerativechancroidal → A57
  • Ulcusmolle (cutis) (skin) → A57
  • Vulvitis (acute) (allergic) (atrophic) (hypertrophic) (intertriginous) (senile)due to Haemophilus ducreyi → A57
  • Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic)phagedenic NOSchancroid → A57
  • Buboinguinal (nonspecific)chancroidal → A57
  • Buboinguinal (nonspecific)due to H. ducreyi → A57
  • Chancre (any genital site) (hard) (hunterian) (mixed) (primary) (seronegative) (seropositive) (syphilitic)softbubo → A57
  • Disease, diseasedsexually transmittedchancroid → A57
  • Infection, infected, infective (opportunistic)Bacillusducreyi (any location) → A57
  • Infection, infected, infective (opportunistic)Hemophilusducreyi (any location) → A57
  • Infection, infected, infective (opportunistic)inguinal (lymph) glandsdue to soft chancre → A57

NCHS Alphabetic Index. Index first, then the Tabular List.

Medicare grouping and edits

CMS files for A57
CC / MCCNeither
Appendix BMDC 12 Diseases and Disorders of the Male Reproductive System, MS-DRG 727-728 (Inflammation of the Male Reproductive System with MCC…); MDC 13 Diseases and Disorders of the Female Reproductive System, MS-DRG 742-743 (Uterine and Adnexa Procedures for Non-Malignancy with CC/MCC…); MDC 13 Diseases and Disorders of the Female Reproductive System, MS-DRG 757-759 (Infections, Female Reproductive System with MCC…)
Code Editor–
POAReported
HCC V28–

CMS: MS-DRG v44 (Appendix B, C), MCE v44, POA list FY2027, 2027 Initial ICD-10-CM Mappings. What the rows mean.

Hierarchy