A50.42

Late congenital syphilitic encephalitis

Billable / specific

A50.42 is a billable, specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes in FY2027.

Inclusion terms

Includes (from A50)

  • diseases generally recognized as communicable or transmissible

Excludes1

Not coded here — never report together with this code.

  • Hutchinson's triad (A50.53) (from A50.4)
  • nonspecific and nongonococcal urethritis (N34.1) (from A50)
  • Reiter's disease (M02.3-) (from A50)

Excludes2

Not included here — may be reported together when both conditions exist.

  • carrier or suspected carrier of infectious disease (Z22.-) (from A50)
  • certain localized infections - see body system-related chapters (from A50)
  • infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-) (from A50)
  • infectious and parasitic diseases specific to the perinatal period (P35-P39) (from A50)
  • influenza and other acute respiratory infections (J00-J22) (from A50)
  • human immunodeficiency virus [HIV] disease (B20) (from A50)

Use additional code

Add a code to identify the following, if applicable.

  • code to identify any associated mental disorder (from A50.4)
  • code to identify resistance to antimicrobial drugs (Z16.-) (from A50)

Also known as

  • Encephalitis, in syphilis, congenital

Parent code

  • A50.4Late congenital neurosyphilis [juvenile neurosyphilis]Header

Related codes

  • A50.40Late congenital neurosyphilis, unspecifiedBillable
  • A50.41Late congenital syphilitic meningitisBillable
  • A50.43Late congenital syphilitic polyneuropathyBillable
  • A50.44Late congenital syphilitic optic nerve atrophyBillable
  • A50.45Juvenile general paresisBillable
  • A50.49Other late congenital neurosyphilisBillable

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