Loading...

    Explore
    • Policy Monitoring
    • Live Policy Feed
    • Billing Codes
    • NPI Medicare & Medicaid
    • Healthcare Providers
    • Health Insurance Payers
    • States
    • Service Lines
    • Taxonomy Codes
    Lookup tools
    • Billing Code Lookup
    • CPT Modifier Lookup
    • Provider Taxonomy Code Lookup
    • Healthcare Provider & Facility Lookup
    • Health Insurance Payer Lookup
    • Payer Contact Directory

    Policy & Benchmark Tools

    • Prior Authorization Lookup
    • Coverage Criteria Lookup
    • Timely Filing Lookup
    • Billing Code Reimbursement Rates
    • Payer Comparison Dashboard
    • Facility Comparison Dashboard
    • All tools

    Company

    • About OpenPayer
    • Data Sources
    • Trek Health
    OpenPayerby Trek Health
    LinkedInYouTube

    © 2026 Trek Health. All rights reserved.

    OpenPayer is built and maintained by Trek Health.

    v1.0.28
    OpenPayerBilling CodesInfections with a predominantly sexual mode of transmissionICD-10-CM a55-chlamydial-lymphogranuloma-venereum
    Ask Trek AI about this page

    ICD-10-CM Code For Chlamydial Lymphogranuloma (Venereum): Group Overview

    The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group A55 includes infections due to Chlamydia trachomatis causing lymphogranuloma venereum, covering presentations such as initial genital lesions, buboes, and proctitis. These ICD-10-CM diagnosis codes are used to document clinical scenarios involving sexually transmitted chlamydial infection with lymphatic involvement, capturing extent of local disease, complications, and anatomic sites affected. Accurate coding within the ICD-10-CM A55 group supports proper claim adjudication, complete clinical documentation, and appropriate reimbursement.

    Customize your policy alerts

    Sign up for ICD-10-CM Code For Chlamydial Lymphogranuloma (Venereum): Group Overview policy alerts

    Get alerted when relevant policies change without checking for updates manually.

    Monitor payer policy activity

    Receive email alerts as soon as relevant payer policies are published or updated.

    ICD-10-CM A55: Chlamydial Lymphogranuloma (Venereum) Overview

    The ICD-10-CM A55 group represents infections caused by Chlamydia trachomatis serovars that produce lymphogranuloma venereum, a sexually transmitted infection that primarily affects lymphatic tissue and mucous membranes of the genital and perianal regions. These diagnoses target the genitourinary and lymphatic systems and may present with primary lesions, lymphadenopathy, or proctocolitis. Accurate coding captures disease severity and complications, supporting correct claim adjudication and clinical documentation for appropriate reimbursement.

    Table of contents

    Progress1 / 6

    Explore openpayer tools

    • Billing CodesCPT, HCPCS, DRG & more
    • Reimbursement RatesCommercial vs. Medicare rate reports
    • ProvidersHospitals & facilities
    • PayersPlans & market footprint
    • Taxonomy CodesNUCC specialty codes
    • ModifiersCPT modifiers & usage
    • Prior AuthorizationPA policies by payer & drug
    • Timely FilingFiling deadlines by payer
    • Coverage CriteriaMedical necessity by payer
    • Payer ContactsClaims, PA & appeals contacts
    View all tools

    When to Use

    Use a code from this group when documentation indicates lymphogranuloma venereum due to Chlamydia trachomatis with specified anatomic involvement or complications. Assign the most specific code that reflects site, severity, and presence of associated lymphatic or proctitic manifestations.

    ICD-10-CM Codes

    1 rows

    ICD-10-CM CodeDescription
    A55Chlamydial lymphogranuloma (venereum)

    DRG Codes

    7 rows

    DRG CodeDescription
    727Inflammation of the Male Reproductive System with MCC
    728Inflammation of the Male Reproductive System without MCC
    742Uterine and Adnexa Procedures for Non-Malignancy with CC/MCC
    743Uterine and Adnexa Procedures for Non-Malignancy without CC/MCC
    757Infections, Female Reproductive System with MCC
    758Infections, Female Reproductive System with CC
    759Infections, Female Reproductive System without CC/MCC

    Typical Clinical Scenarios

    • A 28-year-old cisgender woman presents to the sexual health clinic with several weeks of painful unilateral inguinal swelling and a tender fluctuant groin mass following a history of recent unprotected receptive vaginal intercourse; she reports systemic symptoms of low-grade fever and malaise. Physical exam reveals a tender inguinal lymph node complex with overlying erythema and a small draining sinus; nucleic acid amplification testing (NAAT) of genital swabs confirms Chlamydia trachomatis L-serovar infection, so a diagnosis from this group is assigned for the acute lymphogranuloma venereum presenting with inguinal buboes. Typical codes: A55
    • A 45-year-old man who has sex with men presents to a clinic with several months of recurrent proctitis characterized by rectal pain, tenesmus, and mucopurulent rectal discharge after receptive anal intercourse; outpatient NAAT of rectal swabs identifies C. trachomatis L-serovars. Because the clinical course is subacute to chronic with proctitis symptoms attributable to lymphogranuloma venereum, this condition is coded from this group as the cause of chronic anorectal inflammation. Typical codes: A55
    • A 62-year-old immunocompromised patient on chronic corticosteroid therapy is admitted to the hospital with high fever, severe unilateral groin cellulitis, and sepsis after a delayed presentation of painful inguinal lymphadenopathy that has progressed to extensive tissue necrosis. Surgical and microbiologic evaluation confirms invasive lymphogranuloma venereum with systemic infection, prompting assignment of a code from this group to capture the severe complication of the sexually transmitted C. trachomatis L-serovar infection. Typical codes: A55

    Related Codes

    A50-CONGENITAL-SYPHILIS

    ICD-10-CM Code For Congenital Syphilis: Group Overview

    A51-EARLY-SYPHILIS

    ICD-10-CM Code For Early Syphilis: Group Overview

    A52-LATE-SYPHILIS

    ICD-10-CM Code For Late Syphilis: Group Overview

    A53-OTHER-AND-UNSPECIFIED-SYPHILIS

    ICD-10-CM Code For Other And Unspecified Syphilis: Group Overview

    A54-GONOCOCCAL-INFECTION

    ICD-10-CM Code For Gonococcal Infection: Group Overview

    A56-OTHER-SEXUALLY-TRANSMITTED-CHLAMYDIAL-DISEASES

    ICD-10-CM Code For Other Sexually Transmitted Chlamydial Diseases: Group Overview

    A57-CHANCROID

    ICD-10-CM Code For Chancroid: Group Overview

    A58-GRANULOMA-INGUINALE

    ICD-10-CM Code For Granuloma Inguinale: Group Overview

    A59-TRICHOMONIASIS

    ICD-10-CM Code For Trichomoniasis: Group Overview

    A60-ANOGENITAL-HERPESVIRAL-INFECTIONS

    ICD-10-CM Code For Anogenital Herpesviral Infections: Group Overview

    Showing 1–10 of 12

    Frequently Asked Questions

    References

    1. 1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
    2. 2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
    3. 3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.
    Published by

    Trek Health powers OpenPayer with a leading commercial payer intelligence platform, seamlessly converting fragmented payer data into actionable insights for provider organizations.

    Trek Health ingests and normalizes Transparency in Coverage data and payer policy updates to give provider organizations a clear view of how commercial reimbursement behaves across markets, payers, and services. Our platform transforms raw payer disclosures into structured intelligence that supports contract evaluation, payer negotiations, and service line strategy. By combining market benchmarks with ongoing policy visibility, Trek helps teams identify variability, risk, and opportunity in commercial reimbursement. The result is faster insight, stronger negotiating positions, and more informed financial decisions.