2021

  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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  5. 2021 ICD-10-CM Diagnosis Code A51.49

2021 ICD-10-CM Diagnosis Code A51.49

Other secondary syphilitic conditions

    2016 2017 2018 2019 2020 2021 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 2021 edition of ICD-10-CM A51.49 became effective on October 1, 2020.
  • This is the American ICD-10-CM version of A51.49 - other international versions of ICD-10 A51.49 may differ.
Applicable To
  • Secondary syphilitic lymphadenopathy
  • Secondary syphilitic myositis
The following code(s) above A51.49 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 A51.49:
  • 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
  • Secondary syphilis
  • Syphilis, secondary
ICD-10-CM A51.49 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 A51.49 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
Code annotations containing back-references to A51.49:
  • Type 1 Excludes: M63
    ICD-10-CM Diagnosis Code M63

    Disorders of muscle in diseases classified elsewhere

      2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
    Code First
    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)

Diagnosis Index entries containing back-references to A51.49:
  • Adenopathy (lymph gland) R59.9
    ICD-10-CM Diagnosis Code R59.9

    Enlarged lymph nodes, unspecified

      2016 2017 2018 2019 2020 2021 Billable/Specific Code
    • syphilitic A51.49 (secondary)
  • Lymphadenitis I88.9
    ICD-10-CM Diagnosis Code I88.9

    Nonspecific lymphadenitis, unspecified

      2016 2017 2018 2019 2020 2021 Billable/Specific Code
    Applicable To
    • Lymphadenitis NOS
  • Lymphadenopathy (generalized) R59.1
    ICD-10-CM Diagnosis Code R59.1

    Generalized enlarged lymph nodes

      2016 2017 2018 2019 2020 2021 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 2020 2021 Billable/Specific Code
  • Syphilis, syphilitic (acquired) A53.9
    ICD-10-CM Diagnosis Code A53.9

    Syphilis, unspecified

      2016 2017 2018 2019 2020 2021 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 2020 2021 Billable/Specific Code
      • symptomatic A51.9
        ICD-10-CM Diagnosis Code A51.9

        Early syphilis, unspecified

          2016 2017 2018 2019 2020 2021 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 2020 2021 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 2020 2021 Billable/Specific Code
      Applicable To
      • Late syphilitic peritonitis
      • secondary A51.49
    • adenopathy A51.49 (secondary)
    • lymphadenitis A51.49 (secondary)

ICD-10-CM Codes Adjacent To A51.49
A51.31 Condyloma latum
A51.32 Syphilitic alopecia
A51.39 Other secondary syphilis of skin
A51.4 Other secondary syphilis
A51.41 Secondary syphilitic meningitis
A51.42 Secondary syphilitic female pelvic disease
A51.43 Secondary syphilitic oculopathy
A51.44 Secondary syphilitic nephritis
A51.45 Secondary syphilitic hepatitis
A51.46 Secondary syphilitic osteopathy
A51.49 Other secondary syphilitic conditions
A51.5 Early syphilis, latent
A51.9 Early syphilis, unspecified
A52 Late syphilis
A52.0 Cardiovascular and cerebrovascular syphilis
A52.00 Cardiovascular syphilis, unspecified
A52.01 Syphilitic aneurysm of aorta
A52.02 Syphilitic aortitis
A52.03 Syphilitic endocarditis
A52.04 Syphilitic cerebral arteritis
A52.05 Other cerebrovascular syphilis

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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