DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

A53 Other and unspecified syphilis

  • Header · not billable

A53 is not billable. The category heads 2 billable codes in FY2027: the 2 codes directly below it.

Index → code

  • Syphilis, syphilitic (acquired) → A53.9
  • PositiveVDRL → A53.0
  • PositiveWassermann reaction → A53.0

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. A53 Other and unspecified syphilis
Billable codes
2
Subdivisions
2
CC / MCC codes
0 / 0
HCC V28 codes
0
New FY2027
0
Index entries
17

Codes in A53

  1. A53.0
    Latent syphilis, unspecified as early or late
    Billable
    Inclusion terms 2

    Inclusion terms

    • Latent syphilis NOS
    • Positive serological reaction for syphilis
  2. A53.9
    Syphilis, unspecified
    Billable
    Inclusion terms 2, Excludes1 1

    Inclusion terms

    • Infection due to Treponema pallidum NOS
    • Syphilis (acquired) NOS

    Excludes1

    • syphilis NOS under two years of age (A50.2) A50.2

Sources of each column.

Instructions

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

  • Syphilis, syphilitic (acquired) → A53.9
  • Positiveserology for syphilis → A53.0
  • PositiveVDRL → A53.0
  • PositiveWassermann reaction → A53.0
  • Serology for syphilispositive → A53.0
  • Serology for syphilisreactivated → A53.0
  • Syphilis, syphilitic (acquired)latent → A53.0
  • Syphilis, syphilitic (acquired)conjugal → A53.9
  • Syphilis, syphilitic (acquired)due to blood transfusion → A53.9
  • Syphilis, syphilitic (acquired)general → A53.9
  • Syphilis, syphilitic (acquired)organic → A53.9
  • Syphilis, syphilitic (acquired)latentdate of infection unspecified → A53.0
  • Syphilis, syphilitic (acquired)latentfollow-up of latent syphilis → A53.0
  • Syphilis, syphilitic (acquired)latentpositive serology (only finding) → A53.0
  • PositiveVDRLwith signs or symptoms - code by site and stage under Syphilis → A53.9
  • Syphilis, syphilitic (acquired)latentfollow-up of latent syphilisdate of infection unspecified → A53.0
  • Syphilis, syphilitic (acquired)latentpositive serology (only finding)date of infection unspecified → A53.0

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

Hierarchy