ICDcodes.org
FY2027

A50.6 — Late congenital syphilis, latent

Billable

Is A50.6 billable?

Yes — A50.6 is billable for FY2027. A50.6 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. A50.6 may be submitted for encounters from October 1, 2026 through September 30, 2027.

A50.6 at a glance

CodeA50.6
DescriptionLate congenital syphilis, latent
BillableYes
Code setICD-10-CM FY2027
Valid for encountersOctober 1, 2026 – September 30, 2027

Which MS-DRGs does A50.6 group to?

A50.6 sits in MDC 18 and helps define the logic of 3 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.

  • 867Other Infectious and Parasitic Diseases Diagnoses with MCCmedical
  • 868Other Infectious and Parasitic Diseases Diagnoses with CCmedical
  • 869Other Infectious and Parasitic Diseases Diagnoses without CC/MCCmedical

How is A50.6 listed in the Alphabetic Index?

These are the routes through the Alphabetic Index that lead to A50.6. They show the wording a clinician may have documented, which often differs from the Tabular description.

  • Syphilis, syphilitic › congenital › late, or 2 years or more after birth NEC › latent (acquired)
  • Syphilis, syphilitic › congenital › late, or 2 years or more after birth NEC › latent › negative spinal fluid test (acquired)
  • Syphilis, syphilitic › congenital › late, or 2 years or more after birth NEC › latent › serology positive (acquired)

Inclusion terms

Alternative wording in documentation that is classified to A50.6.

  • Congenital syphilis without clinical manifestations, with positive serological reaction and negative spinal fluid test, two years or more after birth.

Excludes1 — never code together — inherited from A50-A64

The conditions below can never be reported together with A50.6 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.

  • nonspecific and nongonococcal urethritis (N34.1)
  • Reiter's disease (M02.3-)

Use additional code — inherited from Chapter 1

Report an additional code alongside A50.6 to fully describe the condition. A50.6 is sequenced first.

  • code to identify resistance to antimicrobial drugs (Z16.-)

Excludes2 — not included here — inherited from Chapter 1

The conditions below are not part of A50.6, but a patient may have both at the same time. When documentation supports it, A50.6 and the excluded code may both be reported.

  • carrier or suspected carrier of infectious disease (Z22.-)
  • certain localized infections - see body system-related chapters
  • 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)

Excludes2 — not included here — inherited from A50-A64

The conditions below are not part of A50.6, but a patient may have both at the same time. When documentation supports it, A50.6 and the excluded code may both be reported.

  • human immunodeficiency virus [HIV] disease (B20)

How long has A50.6 existed?

A50.6 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.

Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.

What other codes are in the A50 family? (8)