ICD-10-CM Codes
A00-B99
A50-A64
A51-
2023 ICD-10-CM Diagnosis Code A51.49

2023 ICD-10-CM Diagnosis Code A51.49

Other secondary syphilitic conditions

2016

2017

2018

2019

2020

2021

2022

2023

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 2023 edition of ICD-10-CM A51.49 became effective on October 1, 2022.
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
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

Approximate Synonyms

Secondary syphilis
Syphilis, secondary

ICD-10-CM A51.49 is grouped within Diagnostic Related Group(s) (MS-DRG v40.0):

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
2022 (effective 10/1/2021): No change
2023 (effective 10/1/2022): 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
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)

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
- syphilitic A51.49 (secondary)
Lymphadenitis I88.9
ICD-10-CM Diagnosis Code I88.9
Nonspecific lymphadenitis, unspecified
Applicable To
Lymphadenitis NOS
- syphilitic (early) (secondary) A51.49
Lymphadenopathy (generalized) R59.1
ICD-10-CM Diagnosis Code R59.1
Generalized enlarged lymph nodes
Applicable To
Lymphadenopathy NOS
- syphilitic A51.49 (early) (secondary)
Myositis M60.9
ICD-10-CM Diagnosis Code M60.9
Myositis, unspecified
- in (due to)
  - syphilis
    - secondary A51.49
Syphilis, syphilitic (acquired) A53.9
ICD-10-CM Diagnosis Code A53.9
Syphilis, unspecified
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 2022 2023 Billable/Specific Code
  - symptomatic A51.9
    ICD-10-CM Diagnosis Code A51.9
    Early syphilis, unspecified
    2016 2017 2018 2019 2020 2021 2022 2023 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 2022 2023 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 2022 2023 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.

2023 ICD-10-CM Diagnosis Code A51.49

Other secondary syphilitic conditions

Certain infectious and parasitic diseases

Infections with a predominantly sexual mode of transmission

Disorders of muscle in diseases classified elsewhere

Enlarged lymph nodes, unspecified

Nonspecific lymphadenitis, unspecified

Generalized enlarged lymph nodes

Myositis, unspecified

Syphilis, unspecified

Early syphilis, unspecified

Early syphilis, unspecified

Other secondary syphilis of skin

Syphilis of liver and other viscera