A74.9

Chlamydial infection, unspecified

Billable / specific

A74.9 is a billable, specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes in FY2027.

Inclusion terms

Applicable to

  • Chlamydiosis NOS

Includes (from A74)

  • diseases generally recognized as communicable or transmissible

Excludes1

Not coded here — never report together with this code.

  • sexually transmitted chlamydial diseases (A55-A56) (from A74)
  • neonatal chlamydial conjunctivitis (P39.1) (from A74)
  • neonatal chlamydial pneumonia (P23.1) (from A74)
  • Reiter's disease (M02.3-) (from A74)
  • sexually transmitted chlamydial diseases (A55-A56) (from A74)

Excludes2

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

  • carrier or suspected carrier of infectious disease (Z22.-) (from A74)
  • certain localized infections - see body system-related chapters (from A74)
  • infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-) (from A74)
  • infectious and parasitic diseases specific to the perinatal period (P35-P39) (from A74)
  • influenza and other acute respiratory infections (J00-J22) (from A74)
  • chlamydial pneumonia (J16.0) (from A74)

Use additional code

Add a code to identify the following, if applicable.

  • code to identify resistance to antimicrobial drugs (Z16.-) (from A74)

Also known as

  • Chlamydiosis NOS
  • Chlamydia, chlamydial
  • Disease, diseased, chlamydial
  • Infection, infected, infective, Chlamydia, chlamydial

Parent code

  • A74Other diseases caused by chlamydiaeHeader

Related codes

  • A74.0Chlamydial conjunctivitisBillable
  • A74.8Other chlamydial diseasesHeader

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