2023

  1. ICD-10-CM Codes
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  3. A50-A64
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  5. 2023 ICD-10-CM Diagnosis Code A50.31

2023 ICD-10-CM Diagnosis Code A50.31

Late congenital syphilitic interstitial keratitis

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
  • A50.31 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2023 edition of ICD-10-CM A50.31 became effective on October 1, 2022.
  • This is the American ICD-10-CM version of A50.31 - other international versions of ICD-10 A50.31 may differ.
The following code(s) above A50.31 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 A50.31:
  • A00-B99
    2023 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
    2023 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
  • A50.3
    ICD-10-CM Diagnosis Code A50.3

    Late congenital syphilitic oculopathy

      2016 2017 2018 2019 2020 2021 2022 2023 Non-Billable/Non-Specific Code
    Type 1 Excludes
    Late congenital syphilitic oculopathy
Approximate Synonyms
  • Congenital syphilitic interstitial keratitis
  • Syphilitic interstitial keratitis
ICD-10-CM A50.31 is grouped within Diagnostic Related Group(s) (MS-DRG v40.0):
  • 124 Other disorders of the eye with mcc
  • 125 Other disorders of the eye without mcc

Convert A50.31 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
  • 2022 (effective 10/1/2021): No change
  • 2023 (effective 10/1/2022): No change

Diagnosis Index entries containing back-references to A50.31:
  • Keratitis (nodular) (nonulcerative) (simple) (zonular) H16.9
    ICD-10-CM Diagnosis Code H16.9

    Unspecified keratitis

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
    • in (due to)
      • syphilis A50.31
    • interstitial (nonsyphilitic) H16.30-
      ICD-10-CM Diagnosis Code H16.30-

      Unspecified interstitial keratitis

        2016 2017 2018 2019 2020 2021 2022 2023 Non-Billable/Non-Specific Code
      • syphilitic A50.31 (congenital) (late)
    • punctata
      • syphilitic A50.31 (profunda)
    • syphilitic A50.31 (congenital) (prenatal)
  • Syphilis, syphilitic (acquired) A53.9
    ICD-10-CM Diagnosis Code A53.9

    Syphilis, unspecified

      2016 2017 2018 2019 2020 2021 2022 2023 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 2020 2021 2022 2023 Billable/Specific Code
      • late, or 2 years or more after birth NEC A50.7
        ICD-10-CM Diagnosis Code A50.7

        Late congenital syphilis, unspecified

          2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
        Applicable To
        • Congenital syphilis NOS two years or more after birth.
        • interstitial keratitis A50.31
      • interstitial keratitis A50.31
    • keratitis A50.31 (congenital) (interstitial) (late)

ICD-10-CM Codes Adjacent To A50.31
A50.04 Early congenital syphilitic pneumonia
A50.05 Early congenital syphilitic rhinitis
A50.06 Early cutaneous congenital syphilis
A50.07 Early mucocutaneous congenital syphilis
A50.08 Early visceral congenital syphilis
A50.09 Other early congenital syphilis, symptomatic
A50.1 Early congenital syphilis, latent
A50.2 Early congenital syphilis, unspecified
A50.3 Late congenital syphilitic oculopathy
A50.30 …… unspecified
A50.31 Late congenital syphilitic interstitial keratitis
A50.32 Late congenital syphilitic chorioretinitis
A50.39 Other late congenital syphilitic oculopathy
A50.4 Late congenital neurosyphilis [juvenile neurosyphilis]
A50.40 Late congenital neurosyphilis, unspecified
A50.41 Late congenital syphilitic meningitis
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

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

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