1. ICD-10-CM Codes
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2. A00-B99 Certain infectious and parasitic diseases
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3. A50-A64 Infections with a predominantly sexual mode of transmission
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4. A51- Early syphilis
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2018/2019 ICD-10-CM Diagnosis Code A51.49

Other secondary syphilitic conditions

2016 2017 2018 2019 Billable/Specific Code

• A51.49 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
• The 2018/2019 edition of ICD-10-CM A51.49 became effective on October 1, 2018.
• This is the American ICD-10-CM version of A51.49 - other international versions of ICD-10 A51.49 may differ.

• Secondary syphilis
• Syphilis, secondary

• 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 A51.49 to ICD-9-CM

• 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

• Type 1 Excludes: M63
  ICD-10-CM Diagnosis Code M63

  Disorders of muscle in diseases classified elsewhere

  2016 2017 2018 2019 Non-Billable/Non-Specific Code

  Code First

  • underlying disease, such as:
  • leprosy (A30.-)
  • neoplasm (C49.-, C79.89, D21.-, D48.1)
  • schistosomiasis (B65.-)
  • trichinellosis (B75)

  Type 1 Excludes

  • myopathy in cysticercosis (B69.81)
  • myopathy in endocrine diseases (G73.7)
  • myopathy in metabolic diseases (G73.7)
  • myopathy in sarcoidosis (D86.87)
  • myopathy in secondary syphilis (A51.49)
  • myopathy in syphilis (late) (A52.78)
  • myopathy in toxoplasmosis (B58.82)
  • myopathy in tuberculosis (A18.09)

• Adenopathy (lymph gland) R59.9
  ICD-10-CM Diagnosis Code R59.9

  Enlarged lymph nodes, unspecified

  2016 2017 2018 2019 Billable/Specific Code
  • syphilitic A51.49 (secondary)
• Lymphadenitis I88.9
  ICD-10-CM Diagnosis Code I88.9

  Nonspecific lymphadenitis, unspecified

  2016 2017 2018 2019 Billable/Specific Code

  Applicable To

  • Lymphadenitis NOS
  • syphilitic (early) (secondary) A51.49
• Lymphadenopathy (generalized) R59.1
  ICD-10-CM Diagnosis Code R59.1

  Generalized enlarged lymph nodes

  2016 2017 2018 2019 Billable/Specific Code

  Applicable To

  • Lymphadenopathy NOS
  • syphilitic A51.49 (early) (secondary)
• Myositis M60.9
  ICD-10-CM Diagnosis Code M60.9

  Myositis, unspecified

  2016 2017 2018 2019 Billable/Specific Code
  • in (due to)
    • syphilis
      • secondary A51.49
• 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)
  • early A51.9
    ICD-10-CM Diagnosis Code A51.9

    Early syphilis, unspecified

    2016 2017 2018 2019 Billable/Specific Code
    • symptomatic A51.9
      ICD-10-CM Diagnosis Code A51.9

      Early syphilis, unspecified

      2016 2017 2018 2019 Billable/Specific Code
      • secondary A51.39
        - see also Syphilis, secondary
        ICD-10-CM Diagnosis Code A51.39

        Other secondary syphilis of skin

        2016 2017 2018 2019 Billable/Specific Code

        Applicable To

        • Syphilitic leukoderma
        • Syphilitic mucous patch

        Type 1 Excludes

        • late syphilitic leukoderma (A52.79)
        • relapse A51.49 (treated, untreated)
  • lymph gland (early) (secondary) A51.49
  • secondary (and primary) A51.49
    • adenopathy A51.49
    • lymphadenitis A51.49
    • relapse A51.49 (treated, untreated)
    • specified form NEC A51.49
    • viscera NEC A51.49
  • viscera (abdominal) (late) A52.74
    ICD-10-CM Diagnosis Code A52.74

    Syphilis of liver and other viscera

    2016 2017 2018 2019 Billable/Specific Code

    Applicable To

    • Late syphilitic peritonitis
    • secondary A51.49
  • adenopathy A51.49 (secondary)
  • lymphadenitis A51.49 (secondary)

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