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ICD-10-CM 2027

ICD-10 code for ear syphilis

A52.79

Other symptomatic late syphilis

✓ Billable / specificCC — complication/comorbidity

From the official ICD-10-CM alphabetic index entry “Syphilis, syphilitic (acquired) › ear”. Page updated September 29, 2026.

About coding ear syphilis

The ICD-10-CM code for ear syphilis is A52.79 (Other symptomatic late syphilis). The official index lists 3 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on A52.79.

Within A52.7, choose A52.79 (Other symptomatic late syphilis) only when documentation doesn't support a more specific option: late syphilitic oculopathy (A52.71), syphilis of lung and bronchus (A52.72), symptomatic late syphilis of other respiratory organs (A52.73), syphilis of liver and other viscera (A52.74), syphilis of kidney and ureter (A52.75), other genitourinary symptomatic late syphilis (A52.76), syphilis of bone and joint (A52.77) and syphilis of other musculoskeletal tissue (A52.78).

Don't report A52.79 together with the conditions in its Excludes1 note: syphilitic leukoderma (secondary) (A51.39).

As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.

More specific ear syphilis codes (official index)

  • inner A52.79 — Other symptomatic late syphilis
  • nerve (eighth) A52.15 — Late syphilitic neuropathy
  • neurorecurrence A52.15 — Late syphilitic neuropathy

Don't confuse with (Excludes1 for A52.79)

  • syphilitic leukoderma (secondary) (A51.39)

Common questions about ear syphilis ICD-10 codes

What is the ICD-10 code for ear syphilis?

A52.79 — Other symptomatic late syphilis. More specific codes apply when the documentation supports them: A52.79, A52.15, A52.15.

What is the ICD-10 code for inner ear syphilis?

A52.79 — Other symptomatic late syphilis.

Is A52.79 billable?

Yes. A52.79 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can A52.79 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict A52.79 as a principal diagnosis.

Is A52.79 a CC or MCC?

A52.79 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.