A74.9
BillableChlamydial infection, unspecified
Chlamydial infection, unspecified
Coding Notes
Inclusion Terms
Alternative clinical terms for this condition
- Chlamydiosis NOS
Includes
Conditions included under this code
- diseases generally recognized as communicable or transmissible
Excludes 1
Codes that cannot be used together with this code (mutual exclusion)
- certain localized infections - see body system-related chapters
- •sexually transmitted chlamydial diseasesA55-A56
- •neonatal chlamydial conjunctivitisP39.1
- •neonatal chlamydial pneumoniaP23.1
- •Reiter's diseaseM02.3
Excludes 2
Conditions not included here, but the patient may have both
- •carrier or suspected carrier of infectious diseaseZ22
- •infectious and parasitic diseases complicating pregnancy, childbirth and the puerperiumO98
- •infectious and parasitic diseases specific to the perinatal periodP35-P39
- •influenza and other acute respiratory infectionsJ00-J22
- •chlamydial pneumoniaJ16.0
Use Additional Code
Additional codes that should follow this code
ICD-11 Equivalents(1)
ICD-11 Equivalents
View full mappingCorresponding ICD-11 codes from the WHO crosswalk mapping
Also Known As / Clinical Terms(89)
SNOMED CT
- Trachoma2576002
- Chlamydial infection105629000
- CT - Chlamydia trachomatis infection240589008
- Chlamydia trachomatis infection240589008
- Neonatal chlamydial infection240590004
- Chlamydial ophthalmia neonatorum240591000
- Neonatal chlamydial conjunctivitis240591000
- Neonatal conjunctivitis due to chlamydiae240591000
- Neonatal inclusion blennorrhea240591000
- Neonatal inclusion body conjunctivitis240591000
- Ophthalmia neonatorum - chlamydial240591000
- Venereal disease in pregnancy274118001
- Neonatal bacterial conjunctivitis276680000
- Chlamydia pneumoniae infection1163507005
- Infection caused by Chlamydia pneumoniae1163507005
- Chlamydia trachomatis infection in childbirth10750051000119105
- Chlamydia trachomatis infection in mother complicating childbirth10750051000119105
- Chlamydia trachomatis infection in pregnancy1621000119101
- STD (sexually transmitted disease) in childbirth10759841000119105
- Sexually transmitted disease in childbirth10759841000119105
- Sexually transmitted infectious disease in mother complicating childbirth10759841000119105
- Venereal disease caused by Chlamydia trachomatis112121000119105
UMLS
- CHLAMYDIA INFECTC0008149
- Chlamydia InfectionC0008149
- Chlamydia InfectionsC0008149
- Chlamydial InfectionC0008149
- Chlamydial infectionC0008149
- Chlamydial infection (disorder)C0008149
- Chlamydial infection NOSC0008149
- Chlamydial infection, unspecifiedC0008149
- Chlamydial infectionsC0008149
- Chlamydial infectious disordersC0008149
- INFECT CHLAMYDIAC0008149
- Infection, ChlamydiaC0008149
- Infections, ChlamydiaC0008149
- chlamydia bacteria infectionC0008149
- chlamydia infectionC0008149
- chlamydia infectionsC0008149
- chlamydial diseaseC0008149
- chlamydial infectionC0008149
- chlamydial infectionsC0008149
- Chlamydia psittaci InfectionC0276108
- Chlamydia psittaci infectionC0276108
- Chlamydia psittaci infectionsC0276108
- Chlamydiosis NOSC0276108
- Chlamydophila psittaci InfectionC0276108
- PsittacosisC0276108
- chlamydia infection psittaciC0276108
- chlamydiosisC0276108
Clinical Terms
- INFECT CHLAMYDIA
- Infection caused by Chlamydia pneumoniae
- chlamydia bacteria infection
- Chlamydiosis NOS
- chlamydia infections
- Chlamydia trachomatis infection
- Ophthalmia neonatorum - chlamydial
- Chlamydia trachomatis infection in mother complicating childbirth
- Venereal disease in pregnancy
- Chlamydophila psittaci Infection
- Sexually transmitted disease in childbirth
- Chlamydia psittaci Infection
- chlamydial disease
- chlamydia infection psittaci
- Chlamydia pneumoniae infection
- Infection, Chlamydia
- CT - Chlamydia trachomatis infection
- Chlamydia psittaci infections
- Chlamydial ophthalmia neonatorum
- Neonatal chlamydial conjunctivitis
- Neonatal conjunctivitis due to chlamydiae
- Neonatal chlamydial infection
- chlamydial infections
- Chlamydia trachomatis infection in childbirth
- Chlamydia Infection
- Neonatal inclusion body conjunctivitis
- Venereal disease caused by Chlamydia trachomatis
- Chlamydial infection NOS
- Psittacosis
- Neonatal inclusion blennorrhea
- STD (sexually transmitted disease) in childbirth
- CHLAMYDIA INFECT
- Sexually transmitted infectious disease in mother complicating childbirth
- Chlamydial infectious disorders
- Chlamydial infection (disorder)
- Chlamydia trachomatis infection in pregnancy
- Neonatal bacterial conjunctivitis
- Infections, Chlamydia
- Trachoma
- chlamydiosis
Frequently Asked Questions
What is the ICD-10 code for chlamydial infection, unspecified?
The ICD-10-CM code for chlamydial infection, unspecified is A74.9. The full clinical description is "Chlamydial infection, unspecified". A74.9 is a billable/specific code that can be used on insurance claims and medical billing.
What does ICD-10 code A74.9 mean?
ICD-10-CM code A74.9 represents “Chlamydial infection, unspecified”. It is classified under Chapter 1: Certain Infectious and Parasitic Diseases and is a billable/specific code that can be used on a claim.
Is A74.9 a billable code?
Yes, A74.9 is a billable/specific ICD-10-CM code and can be used to indicate a diagnosis on a medical claim.
What chapter is A74.9 in?
A74.9 is in Chapter 1: Certain Infectious and Parasitic Diseases (codes A00-B99).
What codes cannot be used with A74.9?
A74.9 has Excludes1 notes indicating codes that cannot be used together with it, including: certain localized infections - see body system-related chapters; sexually transmitted chlamydial diseases (A55-A56); neonatal chlamydial conjunctivitis (P39.1); and 2 more.
Are additional codes required with A74.9?
Yes, when using A74.9, also report: resistance to antimicrobial drugs (Z16.-).
What SNOMED CT codes does A74.9 map to?
A74.9 maps to 12 SNOMED CT concepts: 240589008, 1163507005, 10750051000119105, 1621000119101, 105629000, and 7 more. SNOMED CT is a clinical terminology used in electronic health records.
What are the UMLS CUIs for A74.9?
A74.9 is linked to 2 UMLS Concept Unique Identifiers: C0008149, C0276108. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
How does A74.9 relate to ICF functioning codes?
ICF (International Classification of Functioning, Disability and Health) codes describe how conditions like chlamydial infection, unspecified affect a person's functioning — body functions, activities, participation, and environmental factors. AutoICD provides ICF Core Sets for 12+ conditions and can map clinical text to ICF categories automatically. Browse the ICF directory to explore functioning codes.
What is the ICD-11 equivalent of A74.9?
A74.9 maps to the ICD-11 code: 1C2Z (Diseases due to chlamydiae, unspecified).
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Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.