N77.0 — Ulceration of vulva in diseases classified elsewhere
Is N77.0 billable?
Yes — N77.0 is billable for FY2027. N77.0 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. N77.0 may be submitted for encounters from October 1, 2026 through September 30, 2027.
N77.0 at a glance
| Code | N77.0 |
|---|---|
| Description | Ulceration of vulva in diseases classified elsewhere |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
What Medicare edits apply to N77.0?
The Medicare Code Editor screens inpatient claims before they are grouped. These edits name N77.0 directly.
This code describes a manifestation of an underlying disease. The underlying condition must be sequenced before it, so it can never be the principal or first-listed diagnosis.
Which MS-DRGs does N77.0 group to?
N77.0 sits in MDC 13 and helps define the logic of 2 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 742Uterine and Adnexa Procedures for Non-Malignancy with CC/MCCsurgical
- 743Uterine and Adnexa Procedures for Non-Malignancy without CC/MCCsurgical
How is N77.0 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to N77.0. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Ulcer, ulcerated, ulcerating, ulceration, ulcerative › vagina › in Behçet's disease
- Ulcer, ulcerated, ulcerating, ulceration, ulcerative › vulva › in › Behçet's disease
Excludes1 — never code together
The conditions below can never be reported together with N77.0 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Code first
The underlying condition below must be sequenced before N77.0. N77.0 describes a manifestation and cannot be the principal or first-listed diagnosis.
- underlying disease, such as:
- Behçet's disease (M35.2)
Excludes1 — never code together — inherited from N70-N77
The conditions below can never be reported together with N77.0 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Excludes2 — not included here — inherited from Chapter 14
The conditions below are not part of N77.0, but a patient may have both at the same time. When documentation supports it, N77.0 and the excluded code may both be reported.
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Code also — inherited from N70-N77
Two codes may be needed to describe the condition fully. Whether N77.0 is sequenced first depends on the reason for the encounter.
- , if applicable, pelvic abscess (K6A.0-)
How long has N77.0 existed?
N77.0 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.
Which codes are confused with N77.0?
ICD-10-CM declares these codes mutually exclusive with N77.0 — exactly one of each pair can be correct for a given encounter.