What A70 covers · when clinicians use it
ICD-10 code A70 identifies Chlamydia psittaci infections in the U.S. ICD-10-CM clinical and billing record set. It sits within the Certain Infectious and Parasitic Diseases chapter (A00–B99), the section that groups related diagnoses so providers, payers, and public-health agencies report them consistently. Clinicians and medical coders apply A70 when an encounter's findings match the Chlamydia psittaci infections description, attaching it to the patient record so downstream insurance claims, payer audits, quality reporting, and epidemiological surveillance all reference the same standardized diagnosis. The ICD-10-CM is maintained by the Centers for Medicare & Medicaid Services and the CDC's National Center for Health Statistics, with an updated official code set released each U.S. fiscal year — always verify A70 against the current CMS/CDC release and your payer's documentation guidance before final use. This page summarizes documentation context for A70 and is a coding reference, not clinical, diagnostic, or billing advice.
A70 refers to Chlamydia psittaci infections, a group of bacterial infections caused by Chlamydia species. These infections can affect the eyes, respiratory tract, or urogenital system. Proper use of this ICD10 code helps ensure accurate diagnosis, effective treatment planning, and consistent reporting across healthcare systems. It also contributes to tracking the prevalence and control efforts of chlamydial diseases.
Symptoms
- Conjunctivitis – Eye redness, irritation, and discharge (common in trachoma)
- Respiratory symptoms – Cough, fever, and difficulty breathing (in psittacosis)
- Visual impairment – Progressive vision loss if trachoma is untreated
- Fatigue – General malaise during systemic infection
- Headache – Common in respiratory involvement
- Swollen lymph nodes – Especially in systemic chlamydial infections
- Chest pain – In cases with lower respiratory tract involvement
Diagnosis
Diagnosis of Chlamydia psittaci infections typically involves a combination of clinical evaluation and laboratory tests. Diagnostic tools include PCR, culture, antigen detection, and serology depending on the site of infection. For trachoma, eye examination and WHO grading systems may be used. Accurate diagnosis allows for effective treatment and prevention of complications like blindness or systemic spread.
ICD10 Code Usage
ICD10 code A70 is used in electronic health records, insurance claims, and epidemiological reporting. It standardizes the classification of chlamydial diseases for consistent diagnosis, treatment, and billing. This code also helps public health authorities monitor infection trends and guide intervention programs, especially in endemic regions affected by trachoma or psittacosis outbreaks.
Related Codes
FAQs
Q1: What is ICD10 code A70?
A: It is used to classify cases of Chlamydia psittaci infections in medical documentation and healthcare systems.
Q2: Is Chlamydia psittaci infections contagious?
A: Yes, many chlamydial infections are contagious through contact with secretions, birds (in psittacosis), or poor hygiene.
Q3: Is this condition treatable?
A: Yes, most chlamydial infections respond well to antibiotics like doxycycline or azithromycin.
Q4: Can this infection recur?
A: Reinfection is possible without proper treatment or exposure prevention.
Q5: Is there a vaccine?
A: No vaccine currently exists, but prevention through hygiene and early treatment is effective.
Conclusion
ICD10 code A70 is important for documenting and managing cases of Chlamydia psittaci infections. It supports accurate clinical care, standardized reporting, and public health surveillance. Correct coding helps prevent complications and promotes early intervention, improving outcomes for patients affected by chlamydial infections.