ICD10BillableValid for clinical use
ICD-10 Code A56.19: Other chlamydial genitourinary infection
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).
đź“‹Clinical overview
This ICD-10 code is commonly used when documentation describes sexually transmitted chlamydial infection. The most accurate code depends on whether the documented site is lower genitourinary tract, pelvic or other genitourinary organs, anus or rectum, pharynx, or another specified site.
When is it used?
- May be used when a clinician documents other chlamydial genitourinary infection 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.
đź©şClinical context
When commonly used
- Primary-care, urgent-care, sexual-health, gynecology, urology, colorectal, and follow-up workflows where chlamydial infection affects diagnosis, treatment planning, partner management, or site-specific counseling.
- Coding and utilization-review workflows where the chart identifies the exact anatomic site of sexually transmitted chlamydial disease and that site changes final code specificity.
Common management context
- Evaluation often includes symptom review, site-specific exam context, STI test-result review, treatment planning, partner-treatment counseling, and follow-up testing planning.
- Documentation usually becomes more specific when the chart identifies lower-genitourinary versus pelvic-inflammatory versus anorectal versus pharyngeal involvement, or clarifies another specified site.
- Specialist context already linked on this page includes Infectious Disease Specialist, General Physician, Urologist.
🔍Key distinctions
Important notes
- This ICD-10 family captures sexually transmitted chlamydial disease across multiple anatomic sites rather than a single genitourinary presentation alone.
- Site detail, such as lower genitourinary, pelvic inflammatory, anorectal, pharyngeal, or another specified site, drives final code specificity inside this family.
- Documentation that describes sexually transmitted chlamydial infection is coded differently from gonococcal infection, nongonococcal urethritis without documented chlamydia, or other sexually transmitted infections when the organism or site is documented more clearly.
Related codes to consider
A56.11Chlamydial female pelvic inflammatory disease
Related sexually-transmitted-chlamydial ICD-10 code; documentation often becomes more specific when the chart identifies lower versus upper genitourinary tract, anorectal, pharyngeal, or another specified chlamydial site.
Code hierarchy
chapter
1Certain infectious and parasitic diseases (A00-B99)
block
A50-A64Infections with a predominantly sexual mode of transmission
category
A56Other sexually transmitted chlamydial diseases
category
A56.1Chlamydial infection of pelviperitoneum and other genitourinary organs
currentA56.1
Official coding notes
Inclusion terms
- Chlamydial epididymitis
- Chlamydial orchitis
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 PhysicianUrologist
Coverage-related procedures and services
CPT 0527Uhigh
HERPES SIMPLEX VIRUS (HSV) TYPES 1 AND 2 AND VARICELLA ZOSTER VIRUS (VZV), AMPLIFIED PROBE TECHNIQUE, EACH PATHOGEN REPORTED AS DETECTED OR NOT DETECTED
Source: CMS coverage guidance
CPT 0402Uhigh
INFECTIOUS AGENT (SEXUALLY TRANSMITTED INFECTION), CHLAMYDIA TRACHOMATIS, NEISSERIA GONORRHOEAE, TRICHOMONAS VAGINALIS, MYCOPLASMA GENITALIUM, MULTIPLEX AMPLIFIED PROBE TECHNIQUE, VAGINAL, ENDOCERVICAL, OR MALE URINE, EACH PATHOGEN REPORTED AS DETECTED OR NOT DETECTED
Source: CMS coverage guidance
CPT 87801high
INFECTIOUS AGENT DETECTION BY NUCLEIC ACID (DNA OR RNA), MULTIPLE ORGANISMS; AMPLIFIED PROBE(S) TECHNIQUE
Source: CMS coverage guidance
CPT 87800high
INFECTIOUS AGENT DETECTION BY NUCLEIC ACID (DNA OR RNA), MULTIPLE ORGANISMS; DIRECT PROBE(S) TECHNIQUE
Source: CMS coverage guidance
CPT 87494high
INFECTIOUS AGENT DETECTION BY NUCLEIC ACID (DNA OR RNA); CHLAMYDIA TRACHOMATIS AND NEISSERIA GONORRHOEAE, MULTIPLEX AMPLIFIED PROBE TECHNIQUE
Source: CMS coverage guidance
CPT 0455Uhigh
INFECTIOUS AGENTS (SEXUALLY TRANSMITTED INFECTION), CHLAMYDIA TRACHOMATIS, NEISSERIA GONORRHOEAE, AND TRICHOMONAS VAGINALIS, MULTIPLEX AMPLIFIED PROBE TECHNIQUE, VAGINAL, ENDOCERVICAL, GYNECOLOGICAL SPECIMENS, OROPHARYNGEAL SWABS, RECTAL SWABS, FEMALE OR MALE URINE, EACH PATHOGEN REPORTED AS DETECTED OR NOT DETECTED
Source: CMS coverage guidance
Coding guidelines
Common synonyms
Other chlamydial genitourinary infection
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.