ICD-10-CM Section · A50-A64
Infections with a predominantly sexual mode of transmission
169 codes in this section
169
Total Codes
142
Billable
27
Header (Non-Billable)
13
Top-Level Codes
About Section A50-A64
Section A50-A64 (A50-A64) covers infections with a predominantly sexual mode of transmission. It sits within the Certain infectious and parasitic diseases chapter (A00-B99). This section contains 169 ICD-10-CM codes, 142 billable diagnoses you can submit on a claim, and 27 non-billable header codes used to organize the hierarchy.
Codes are organized below by 3-character root. Click the root to see all subcodes underneath it, or click any individual code for full coverage data, payer policies, and linked CPT procedures.
Codes in A50-A64
Grouped by 3-character root code. Click any code for full detail.
A50
Congenital syphilis
37 subcodes
| A50.0 | Early congenital syphilis, symptomatic | Header |
| A50.01 | Early congenital syphilitic oculopathy | Billable |
| A50.02 | Early congenital syphilitic osteochondropathy | Billable |
| A50.03 | Early congenital syphilitic pharyngitis | Billable |
| A50.04 | Early congenital syphilitic pneumonia | Billable |
| A50.05 | Early congenital syphilitic rhinitis | Billable |
| A50.06 | Early cutaneous congenital syphilis | Billable |
| A50.07 | Early mucocutaneous congenital syphilis | Billable |
| A50.08 | Early visceral congenital syphilis | Billable |
| A50.09 | Other early congenital syphilis, symptomatic | Billable |
| A50.1 | Early congenital syphilis, latent | Billable |
| A50.2 | Early congenital syphilis, unspecified | Billable |
| A50.3 | Late congenital syphilitic oculopathy | Header |
| A50.30 | Late congenital syphilitic oculopathy, unspecified | Billable |
| A50.31 | Late congenital syphilitic interstitial keratitis | Billable |
| A50.32 | Late congenital syphilitic chorioretinitis | Billable |
| A50.39 | Other late congenital syphilitic oculopathy | Billable |
| A50.4 | Late congenital neurosyphilis [juvenile neurosyphilis] | Header |
| A50.40 | Late congenital neurosyphilis, unspecified | Billable |
| A50.41 | Late congenital syphilitic meningitis | Billable |
| A50.42 | Late congenital syphilitic encephalitis | Billable |
| A50.43 | Late congenital syphilitic polyneuropathy | Billable |
| A50.44 | Late congenital syphilitic optic nerve atrophy | Billable |
| A50.45 | Juvenile general paresis | Billable |
| A50.49 | Other late congenital neurosyphilis | Billable |
| A50.5 | Other late congenital syphilis, symptomatic | Header |
| A50.51 | Clutton's joints | Billable |
| A50.52 | Hutchinson's teeth | Billable |
| A50.53 | Hutchinson's triad | Billable |
| A50.54 | Late congenital cardiovascular syphilis | Billable |
| A50.55 | Late congenital syphilitic arthropathy | Billable |
| A50.56 | Late congenital syphilitic osteochondropathy | Billable |
| A50.57 | Syphilitic saddle nose | Billable |
| A50.59 | Other late congenital syphilis, symptomatic | Billable |
| A50.6 | Late congenital syphilis, latent | Billable |
| A50.7 | Late congenital syphilis, unspecified | Billable |
| A50.9 | Congenital syphilis, unspecified | Billable |
A51
Early syphilis
17 subcodes
| A51.0 | Primary genital syphilis | Billable |
| A51.1 | Primary anal syphilis | Billable |
| A51.2 | Primary syphilis of other sites | Billable |
| A51.3 | Secondary syphilis of skin and mucous membranes | Header |
| A51.31 | Condyloma latum | Billable |
| A51.32 | Syphilitic alopecia | Billable |
| A51.39 | Other secondary syphilis of skin | Billable |
| A51.4 | Other secondary syphilis | Header |
| A51.41 | Secondary syphilitic meningitis | Billable |
| A51.42 | Secondary syphilitic female pelvic disease | Billable |
| A51.43 | Secondary syphilitic oculopathy | Billable |
| A51.44 | Secondary syphilitic nephritis | Billable |
| A51.45 | Secondary syphilitic hepatitis | Billable |
| A51.46 | Secondary syphilitic osteopathy | Billable |
| A51.49 | Other secondary syphilitic conditions | Billable |
| A51.5 | Early syphilis, latent | Billable |
| A51.9 | Early syphilis, unspecified | Billable |
A52
Late syphilis
33 subcodes
| A52.0 | Cardiovascular and cerebrovascular syphilis | Header |
| A52.00 | Cardiovascular syphilis, unspecified | Billable |
| A52.01 | Syphilitic aneurysm of aorta | Billable |
| A52.02 | Syphilitic aortitis | Billable |
| A52.03 | Syphilitic endocarditis | Billable |
| A52.04 | Syphilitic cerebral arteritis | Billable |
| A52.05 | Other cerebrovascular syphilis | Billable |
| A52.06 | Other syphilitic heart involvement | Billable |
| A52.09 | Other cardiovascular syphilis | Billable |
| A52.1 | Symptomatic neurosyphilis | Header |
| A52.10 | Symptomatic neurosyphilis, unspecified | Billable |
| A52.11 | Tabes dorsalis | Billable |
| A52.12 | Other cerebrospinal syphilis | Billable |
| A52.13 | Late syphilitic meningitis | Billable |
| A52.14 | Late syphilitic encephalitis | Billable |
| A52.15 | Late syphilitic neuropathy | Billable |
| A52.16 | Charcot's arthropathy (tabetic) | Billable |
| A52.17 | General paresis | Billable |
| A52.19 | Other symptomatic neurosyphilis | Billable |
| A52.2 | Asymptomatic neurosyphilis | Billable |
| A52.3 | Neurosyphilis, unspecified | Billable |
| A52.7 | Other symptomatic late syphilis | Header |
| A52.71 | Late syphilitic oculopathy | Billable |
| A52.72 | Syphilis of lung and bronchus | Billable |
| A52.73 | Symptomatic late syphilis of other respiratory organs | Billable |
| A52.74 | Syphilis of liver and other viscera | Billable |
| A52.75 | Syphilis of kidney and ureter | Billable |
| A52.76 | Other genitourinary symptomatic late syphilis | Billable |
| A52.77 | Syphilis of bone and joint | Billable |
| A52.78 | Syphilis of other musculoskeletal tissue | Billable |
| A52.79 | Other symptomatic late syphilis | Billable |
| A52.8 | Late syphilis, latent | Billable |
| A52.9 | Late syphilis, unspecified | Billable |
A53
Other and unspecified syphilis
2 subcodes
| A53.0 | Latent syphilis, unspecified as early or late | Billable |
| A53.9 | Syphilis, unspecified | Billable |
A54
Gonococcal infection
36 subcodes
| A54.0 | Gonococcal infection of lower genitourinary tract without periurethral or accessory gland abscess | Header |
| A54.00 | Gonococcal infection of lower genitourinary tract, unspecified | Billable |
| A54.01 | Gonococcal cystitis and urethritis, unspecified | Billable |
| A54.02 | Gonococcal vulvovaginitis, unspecified | Billable |
| A54.03 | Gonococcal cervicitis, unspecified | Billable |
| A54.09 | Other gonococcal infection of lower genitourinary tract | Billable |
| A54.1 | Gonococcal infection of lower genitourinary tract with periurethral and accessory gland abscess | Billable |
| A54.2 | Gonococcal pelviperitonitis and other gonococcal genitourinary infection | Header |
| A54.21 | Gonococcal infection of kidney and ureter | Billable |
| A54.22 | Gonococcal prostatitis | Billable |
| A54.23 | Gonococcal infection of other male genital organs | Billable |
| A54.24 | Gonococcal female pelvic inflammatory disease | Billable |
| A54.29 | Other gonococcal genitourinary infections | Billable |
| A54.3 | Gonococcal infection of eye | Header |
| A54.30 | Gonococcal infection of eye, unspecified | Billable |
| A54.31 | Gonococcal conjunctivitis | Billable |
| A54.32 | Gonococcal iridocyclitis | Billable |
| A54.33 | Gonococcal keratitis | Billable |
| A54.39 | Other gonococcal eye infection | Billable |
| A54.4 | Gonococcal infection of musculoskeletal system | Header |
| A54.40 | Gonococcal infection of musculoskeletal system, unspecified | Billable |
| A54.41 | Gonococcal spondylopathy | Billable |
| A54.42 | Gonococcal arthritis | Billable |
| A54.43 | Gonococcal osteomyelitis | Billable |
| A54.49 | Gonococcal infection of other musculoskeletal tissue | Billable |
| A54.5 | Gonococcal pharyngitis | Billable |
| A54.6 | Gonococcal infection of anus and rectum | Billable |
| A54.8 | Other gonococcal infections | Header |
| A54.81 | Gonococcal meningitis | Billable |
| A54.82 | Gonococcal brain abscess | Billable |
| A54.83 | Gonococcal heart infection | Billable |
| A54.84 | Gonococcal pneumonia | Billable |
| A54.85 | Gonococcal peritonitis | Billable |
| A54.86 | Gonococcal sepsis | Billable |
| A54.89 | Other gonococcal infections | Billable |
| A54.9 | Gonococcal infection, unspecified | Billable |
A55
Chlamydial lymphogranuloma (venereum)
0 subcodes
A56
Other sexually transmitted chlamydial diseases
12 subcodes
| A56.0 | Chlamydial infection of lower genitourinary tract | Header |
| A56.00 | Chlamydial infection of lower genitourinary tract, unspecified | Billable |
| A56.01 | Chlamydial cystitis and urethritis | Billable |
| A56.02 | Chlamydial vulvovaginitis | Billable |
| A56.09 | Other chlamydial infection of lower genitourinary tract | Billable |
| A56.1 | Chlamydial infection of pelviperitoneum and other genitourinary organs | Header |
| A56.11 | Chlamydial female pelvic inflammatory disease | Billable |
| A56.19 | Other chlamydial genitourinary infection | Billable |
| A56.2 | Chlamydial infection of genitourinary tract, unspecified | Billable |
| A56.3 | Chlamydial infection of anus and rectum | Billable |
| A56.4 | Chlamydial infection of pharynx | Billable |
| A56.8 | Sexually transmitted chlamydial infection of other sites | Billable |
A57
Chancroid
0 subcodes
A58
Granuloma inguinale
0 subcodes
A59
Trichomoniasis
8 subcodes
| A59.0 | Urogenital trichomoniasis | Header |
| A59.00 | Urogenital trichomoniasis, unspecified | Billable |
| A59.01 | Trichomonal vulvovaginitis | Billable |
| A59.02 | Trichomonal prostatitis | Billable |
| A59.03 | Trichomonal cystitis and urethritis | Billable |
| A59.09 | Other urogenital trichomoniasis | Billable |
| A59.8 | Trichomoniasis of other sites | Billable |
| A59.9 | Trichomoniasis, unspecified | Billable |
A60
Anogenital herpesviral [herpes simplex] infections
9 subcodes
| A60.0 | Herpesviral infection of genitalia and urogenital tract | Header |
| A60.00 | Herpesviral infection of urogenital system, unspecified | Billable |
| A60.01 | Herpesviral infection of penis | Billable |
| A60.02 | Herpesviral infection of other male genital organs | Billable |
| A60.03 | Herpesviral cervicitis | Billable |
| A60.04 | Herpesviral vulvovaginitis | Billable |
| A60.09 | Herpesviral infection of other urogenital tract | Billable |
| A60.1 | Herpesviral infection of perianal skin and rectum | Billable |
| A60.9 | Anogenital herpesviral infection, unspecified | Billable |
A63
Other predominantly sexually transmitted diseases, not elsewhere classified
2 subcodes
| A63.0 | Anogenital (venereal) warts | Billable |
| A63.8 | Other specified predominantly sexually transmitted diseases | Billable |
A64
Unspecified sexually transmitted disease
0 subcodes
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Verified against the CMS 2026 code set on May 31, 2026.
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