2019 ICD-10-CM Diagnosis Code A50.55

Late congenital syphilitic arthropathy

    2016 2017 2018 2019 Billable/Specific Code
  • A50.55 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2019 edition of ICD-10-CM A50.55 became effective on October 1, 2018.
  • This is the American ICD-10-CM version of A50.55 - other international versions of ICD-10 A50.55 may differ.
The following code(s) above A50.55 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 A50.55:
  • A00-B99
    2019 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
    2019 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
  • A50.5
    ICD-10-CM Diagnosis Code A50.5

    Other late congenital syphilis, symptomatic

      2016 2017 2018 2019 Non-Billable/Non-Specific Code
    Applicable To
    • Any congenital syphilitic condition specified as late or manifest two years or more after birth.
    Other late congenital syphilis, symptomatic
ICD-10-CM A50.55 is grouped within Diagnostic Related Group(s) (MS-DRG v36.0):
  • 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 A50.55 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

Diagnosis Index entries containing back-references to A50.55:
  • Arthritis, arthritic (acute) (chronic) (nonpyogenic) (subacute) M19.90
    ICD-10-CM Diagnosis Code M19.90

    Unspecified osteoarthritis, unspecified site

      2016 2017 2018 2019 Billable/Specific Code
    Applicable To
    • Arthrosis NOS
    • Arthritis NOS
    • Osteoarthritis NOS
    • syphilitic (late) A52.16
      ICD-10-CM Diagnosis Code A52.16

      Charcôt's arthropathy (tabetic)

        2016 2017 2018 2019 Billable/Specific Code
      • congenital A50.55
  • Arthropathy M12.9
    - see also Arthritis
    ICD-10-CM Diagnosis Code M12.9

    Arthropathy, unspecified

      2016 2017 2018 2019 Billable/Specific Code
    • in (due to)
      • syphilis (late) A52.77
        ICD-10-CM Diagnosis Code A52.77

        Syphilis of bone and joint

          2016 2017 2018 2019 Billable/Specific Code
        • congenital A50.55
  • Hydrarthrosis - see also Effusion, joint
    • syphilitic (late) A52.77
      ICD-10-CM Diagnosis Code A52.77

      Syphilis of bone and joint

        2016 2017 2018 2019 Billable/Specific Code
      • congenital A50.55
  • Syphilis, syphilitic (acquired) A53.9
    ICD-10-CM Diagnosis Code A53.9

    Syphilis, unspecified

      2016 2017 2018 2019 Billable/Specific Code
    Applicable To
    • Infection due to Treponema pallidum NOS
    • Syphilis (acquired) NOS
    Type 1 Excludes
    • syphilis NOS under two years of age (A50.2)
    • congenital A50.9
      ICD-10-CM Diagnosis Code A50.9

      Congenital syphilis, unspecified

        2016 2017 2018 2019 Billable/Specific Code

ICD-10-CM Codes Adjacent To A50.55
A50.42 Late congenital syphilitic encephalitis
A50.43 Late congenital syphilitic polyneuropathy
A50.44 Late congenital syphilitic optic nerve atrophy
A50.45 Juvenile general paresis
A50.49 Other late congenital neurosyphilis
A50.5 Other late congenital syphilis, symptomatic
A50.51 Clutton's joints
A50.52 Hutchinson's teeth
A50.53 Hutchinson's triad
A50.54 Late congenital cardiovascular syphilis
A50.55 Late congenital syphilitic arthropathy
A50.56 Late congenital syphilitic osteochondropathy
A50.57 Syphilitic saddle nose
A50.59 Other late congenital syphilis, symptomatic
A50.6 Late congenital syphilis, latent
A50.7 Late congenital syphilis, unspecified
A50.9 Congenital syphilis, unspecified
A51 Early syphilis
A51.0 Primary genital syphilis
A51.1 Primary anal syphilis
A51.2 Primary syphilis of other sites

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