N77.0 Ulceration of vulva in diseases classified elsewhere

Billable ICD-10-CM code, FY2026.

Excludes1 (never code together)

• ulceration of vulva in gonococcal infection (A54.02)
• ulceration of vulva in herpesviral [herpes simplex] infection (A60.04)
• ulceration of vulva in syphilis (A51.0)
• ulceration of vulva in tuberculosis (A18.18)

Code first

• underlying disease, such as:
• Behçet's disease (M35.2)

MS-DRG index

Defines the logic of DRG(s) 742-743 in MDC 13.

Approximate ICD-9-CM (GEMs)

• 616.51 Ulceration of vulva in diseases classified elsewhere

Medicare Code Edits (MCE v43.1 (April 2026))

• Manifestation codes as principal diagnosis: Manifestation codes describe the manifestation of an underlying disease, not the disease itself, and are not allowed as principal diagnosis.

Diagnosis Index entries for N77.0

• Ulcer, ulcerated, ulcerating, ulceration, ulcerative › vagina › in Behçet's disease
• Ulcer, ulcerated, ulcerating, ulceration, ulcerative › vulva (acute) (infectional) › in (due to) › Behçet's disease

Nearby codes

• N77 Vulvovaginal ulceration and inflammation in diseases classified elsewhere
• N77.0 Ulceration of vulva in diseases classified elsewhere (this code)
• N77.1 Vaginitis, vulvitis and vulvovaginitis in diseases classified elsewhere