2021 ICD-10-CM Diagnosis Code A53.9

Syphilis, unspecified

    2016 2017 2018 2019 2020 2021 Billable/Specific Code
  • A53.9 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2021 edition of ICD-10-CM A53.9 became effective on October 1, 2020.
  • This is the American ICD-10-CM version of A53.9 - other international versions of ICD-10 A53.9 may differ.
Applicable To
  • Infection due to Treponema pallidum NOS
  • Syphilis (acquired) NOS
Type 1 Excludes
Type 1 Excludes Help
A type 1 excludes note is a pure excludes. It means "not coded here". A type 1 excludes note indicates that the code excluded should never be used at the same time as A53.9. A type 1 excludes note is for used for when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • syphilis NOS under two years of age (
    ICD-10-CM Diagnosis Code A50.2

    Early congenital syphilis, unspecified

      2016 2017 2018 2019 2020 2021 Billable/Specific Code
    Applicable To
    • Congenital syphilis NOS less than two years after birth.
    A50.2
    )
The following code(s) above A53.9 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to A53.9:
  • A00-B99
    2021 ICD-10-CM Range A00-B99

    Certain infectious and parasitic diseases

    Includes
    • diseases generally recognized as communicable or transmissible
    Type 1 Excludes
    • certain localized infections - see body system-related chapters
    Type 2 Excludes
    • carrier or suspected carrier of infectious disease (Z22.-)
    • infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
    • infectious and parasitic diseases specific to the perinatal period (P35-P39)
    • influenza and other acute respiratory infections (J00-J22)
    Use Additional
    • code to identify resistance to antimicrobial drugs (Z16.-)
    Certain infectious and parasitic diseases
  • A50-A64
    2021 ICD-10-CM Range A50-A64

    Infections with a predominantly sexual mode of transmission

    Type 1 Excludes
    • human immunodeficiency virus [HIV] disease (B20)
    • nonspecific and nongonococcal urethritis (N34.1)
    • Reiter's disease (M02.3-)
    Infections with a predominantly sexual mode of transmission
Approximate Synonyms
  • Maternal syphilis complicating pregnancy, after childbirth
  • Maternal syphilis during pregnancy - baby not yet delivered
  • Postpartum syphilis
  • Syphilis
  • Syphilis in childbirth
  • Syphilis in pregnancy
Clinical Information
  • A contagious bacterial infection caused by the spirochete treponema pallidum. It is a sexually transmitted disorder, although it can also be transmitted from the mother to the fetus in utero. Typically, it is initially manifested with a single sore which heals without treatment. If the infection is left untreated, the initial stage is followed by skin rash and mucous membrane lesions. A late stage follows, which is characterized by damage of the internal organs, including the nervous system.
  • A contagious venereal disease caused by the spirochete treponema pallidum.
  • Subacute to chronic infectious venereal disease caused by the spirochete treponema pallidum.
  • Syphilis is a sexually transmitted disease caused by bacteria. It infects the genital area, lips, mouth, or anus of both men and women. You usually get syphilis from sexual contact with someone who has it. It can also pass from mother to baby during pregnancy. The early stage of syphilis usually causes a single, small, painless sore. Sometimes it causes swelling in nearby lymph nodes. If you do not treat it, syphilis usually causes a non-itchy skin rash, often on your hands and feet. Many people do not notice symptoms for years. Symptoms can go away and come back. The sores caused by syphilis make it easier to get or give someone hiv during sex. If you are pregnant, syphilis can cause birth defects, or you could lose your baby. In rare cases, syphilis causes serious health problems and even death.syphilis is easy to cure with antibiotics if you catch it early. Correct usage of latex condoms greatly reduces, but does not completely eliminate, the risk of catching or spreading syphilis.
ICD-10-CM A53.9 is grouped within Diagnostic Related Group(s) (MS-DRG v38.0):
  • 867 Other infectious and parasitic diseases diagnoses with mcc
  • 868 Other infectious and parasitic diseases diagnoses with cc
  • 869 Other infectious and parasitic diseases diagnoses without cc/mcc

Convert A53.9 to ICD-9-CM

Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
  • 2021 (effective 10/1/2020): No change

Diagnosis Index entries containing back-references to A53.9:
  • Positive
    • VDRL A53.0
      ICD-10-CM Diagnosis Code A53.0

      Latent syphilis, unspecified as early or late

        2016 2017 2018 2019 2020 2021 Billable/Specific Code
      Applicable To
      • Latent syphilis NOS
      • Positive serological reaction for syphilis
      • with signs or symptoms - code by site and stage under Syphilis A53.9
  • Syphilis, syphilitic (acquired) A53.9

ICD-10-CM Codes Adjacent To A53.9
A52.74 Syphilis of liver and other viscera
A52.75 Syphilis of kidney and ureter
A52.76 Other genitourinary symptomatic late syphilis
A52.77 Syphilis of bone and joint
A52.78 Syphilis of other musculoskeletal tissue
A52.79 Other symptomatic late syphilis
A52.8 Late syphilis, latent
A52.9 Late syphilis, unspecified
A53 Other and unspecified syphilis
A53.0 Latent syphilis, unspecified as early or late
A53.9 Syphilis, unspecified
A54 Gonococcal infection
A54.0 Gonococcal infection of lower genitourinary tract without periurethral or accessory gland abscess
A54.00 Gonococcal infection of lower genitourinary tract, unspecified
A54.01 Gonococcal cystitis and urethritis, unspecified
A54.02 Gonococcal vulvovaginitis, unspecified
A54.03 Gonococcal cervicitis, unspecified
A54.09 Other gonococcal infection of lower genitourinary tract
A54.1 Gonococcal infection of lower genitourinary tract with periurethral and accessory gland abscess
A54.2 Gonococcal pelviperitonitis and other gonococcal genitourinary infection
A54.21 Gonococcal infection of kidney and ureter

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.