ICD10BillableValid for clinical use
ICD-10 Code A74.0: Chlamydial conjunctivitis
Reviewed by HealthAssure Clinical TeamUpdated 26 May 2026
What is this code?
ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Certain infectious and parasitic diseases (A00-B99).
When is it used?
- May be used when a clinician documents chlamydial conjunctivitis in a patient's medical record.
- May appear in hospital records, claims, referrals, and clinical documentation.
- This code can be used as a clinically usable diagnosis entry in standardized coding workflows.
What it does not mean
- A code alone does not explain severity, treatment plan, or outcome.
- A medical code should not be treated as a substitute for a doctor's diagnosis or advice.
Code hierarchy
chapter
1Certain infectious and parasitic diseases (A00-B99)
block
A70-A74Other diseases caused by chlamydiae
category
A74Other diseases caused by chlamydiae
currentA74
Official coding notes
Inclusion terms
- Paratrachoma
Where you may see this code
You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records.
Related specialists
Infectious Disease SpecialistGeneral Physician
Mapped diagnoses and classifications
SNOMED_CT 15680081000119109high
Bilateral chlamydial conjunctivitis
Source: SNOMED International ICD-10 map
SNOMED_CT 231861005high
Chlamydial conjunctivitis
Source: SNOMED International ICD-10 map
SNOMED_CT 1217671004high
Chronic chlamydial follicular conjunctivitis
Source: SNOMED International ICD-10 map
SNOMED_CT 15680161000119101high
Conjunctivitis of left eye caused by Chlamydia trachomatis
Source: SNOMED International ICD-10 map
SNOMED_CT 15680121000119106high
Conjunctivitis of right eye caused by Chlamydia trachomatis
Source: SNOMED International ICD-10 map
SNOMED_CT 56009001high
Inclusion conjunctivitis of the adult
Source: SNOMED International ICD-10 map
Coding guidelines
Compatibility
Legacy and official ICD code match exactly.
Legacy codes
A74.0
Common synonyms
Chlamydial conjunctivitis
Frequently asked questions
About this content
This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.