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    v1.0.28
    OpenPayerBilling CodesInfections with a predominantly sexual mode of transmissionICD-10-CM a63-other-predominantly-sexually-transmitted-diseases
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    ICD-10-CM Code For Other Predominantly Sexually Transmitted Diseases Not Elsewhere Classified: Group Overview

    The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group A63 includes miscellaneous sexually transmitted infections not classified in other sections, such as granuloma inguinale and other specified sexually transmitted infections. These ICD-10-CM diagnosis codes are used to document clinical encounters for sexually transmitted infections that do not have a specific separate code, capturing disease presentation, site of involvement, and any complications when applicable. Accurate coding within the ICD-10-CM A63 group supports proper claim adjudication, complete clinical documentation, and appropriate reimbursement.

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    ICD-10-CM A63: Other Predominantly Sexually Transmitted Diseases, Not Elsewhere Classified Overview

    This group represents a set of infections that are primarily transmitted through sexual contact but are not classified elsewhere in the International Classification of Diseases, Tenth Revision, Clinical Modification. These conditions commonly affect the genitourinary and mucocutaneous systems and include less common or unspecified sexually transmitted infections. Accurate coding is important for complete clinical documentation and supports appropriate reimbursement for services related to diagnosis and treatment.

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    When to Use

    Use a code from this group when the clinical record documents a sexually transmitted infection that is specified as part of this category or when no more specific ICD-10-CM code exists for the diagnosed infection. Select the most specific code available within the group based on the documented organism, site, and clinical presentation.

    ICD-10-CM Codes

    2 rows

    ICD-10-CM CodeDescription
    A63.0Anogenital (venereal) warts
    A63.8Other specified predominantly sexually transmitted diseases

    DRG Codes

    9 rows

    DRG CodeDescription
    606Minor Skin Disorders with MCC
    607Minor Skin Disorders without MCC
    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 young adult presents to a sexual health clinic with a painless papule on the penis detected during a routine STI screen; the lesion is suspicious for a sexually transmitted dermatologic infection that is not typical for syphilis or HSV and laboratory testing is pending. A diagnosis from this group is assigned when the clinician documents a predominantly sexually transmitted infection of the genital skin or mucosa that does not fit other specific STI codes. Typical codes: A63.0, A63.8
    • A middle-aged patient reports chronic, recurrent nonspecific genital dermatitis with intermittent pruritus and erythema after multiple sexual partners; prior targeted testing for gonorrhea, chlamydia, syphilis, and herpes was negative, and the provider records an unspecified sexually associated infection pending further evaluation. This scenario represents an ongoing, nonacute genital infection of presumed sexual transmission when no more specific etiology is identified. Typical codes: A63.8
    • An emergency department visit for acute vulvar discomfort and suspicious ulceration after a new sexual exposure; rapid testing for common STIs is inconclusive and the clinician documents an other predominantly sexually transmitted infection while arranging empiric care and referral. In the acute care setting when the presentation is consistent with a sexually transmitted infection that cannot be classified under a specific code, a code from this group is used. Typical codes: A63.0, A63.8

    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

    A55-CHLAMYDIAL-LYMPHOGRANULOMA-VENEREUM

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

    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.
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