A53.9

Syphilis, unspecified

Billable / specific

A53.9 is a billable, specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes in FY2027.

Inclusion terms

Applicable to

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

Includes (from A53)

  • diseases generally recognized as communicable or transmissible

Excludes1

Not coded here — never report together with this code.

  • syphilis NOS under two years of age (A50.2)
  • nonspecific and nongonococcal urethritis (N34.1) (from A53)
  • Reiter's disease (M02.3-) (from A53)

Excludes2

Not included here — may be reported together when both conditions exist.

  • carrier or suspected carrier of infectious disease (Z22.-) (from A53)
  • certain localized infections - see body system-related chapters (from A53)
  • infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-) (from A53)
  • infectious and parasitic diseases specific to the perinatal period (P35-P39) (from A53)
  • influenza and other acute respiratory infections (J00-J22) (from A53)
  • human immunodeficiency virus [HIV] disease (B20) (from A53)

Use additional code

Add a code to identify the following, if applicable.

  • code to identify resistance to antimicrobial drugs (Z16.-) (from A53)

Also known as

  • Infection due to Treponema pallidum NOS
  • Syphilis (acquired) NOS
  • Positive, VDRL, with signs or symptoms - code by site and stage under Syphilis
  • Syphilis, syphilitic
  • Syphilis, syphilitic, conjugal
  • Syphilis, syphilitic, due to blood transfusion
  • Syphilis, syphilitic, general
  • Syphilis, syphilitic, organic

Parent code

  • A53Other and unspecified syphilisHeader

Related codes

  • A53.0Latent syphilis, unspecified as early or lateBillable

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