A51.43Secondary syphilitic oculopathy

A51.43 is the ICD-10-CM diagnosis code for secondary syphilitic oculopathy. It belongs to category A51 (early syphilis), block A50-A64 (infections with a predominantly sexual mode of transmission) and chapter 1 (certain infectious and parasitic diseases). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within A51.4 (other secondary syphilis), A51.43 is specifically for secondary syphilitic oculopathy. Related codes cover secondary syphilitic meningitis (A51.41), secondary syphilitic female pelvic disease (A51.42), secondary syphilitic nephritis (A51.44), secondary syphilitic hepatitis (A51.45), secondary syphilitic osteopathy (A51.46) and other secondary syphilitic conditions (A51.49).

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.

In MS-DRG v44.0, it is part of the grouping logic for DRG 124 (Other Disorders of the Eye with MCC or Thrombolytic Agent, relative weight 1.2471) and DRG 125 (Other Disorders of the Eye without MCC, relative weight 0.7702), in MDC 02 (Diseases and Disorders of the Eye), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as 091.50 (syphilitic uveitis, unspecified), 091.51 (syphilitic chorioretinitis (secondary)) and 091.52 (syphilitic iridocyclitis (secondary)).