2026 ICD-10-CM Diagnosis Code S30.824ABlister (nonthermal) of vagina and vulva, initial encounter
S30.824A is a billable ICD-10-CM diagnosis code for blister (nonthermal) of vagina and vulva, initial encounter. The 7th character A marks it as an initial encounter code, used while the patient is receiving active treatment. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 606 through 607, 963 through 965. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Superficial injury; contusion, initial encounter.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Blister of perineum with infection
- Blister of perineum without infection
- Blister of vagina with infection
- Blister of vagina without infection
- Blister of vulva with infection
- Blister of vulva without infection
- Superficial injury of vagina with infection
- Traumatic blister of vagina
- Traumatic blister of vagina, infected
- Traumatic blister of vulva
- Traumatic blister of vulva, infected
- Vaginal blister
Coding GuidelinesGuidance
The appropriate 7th character is to be added to each code from block Superficial injury of abdomen, lower back, pelvis and external genitals (S30). Use the following options for the applicable episode of care:
- A - initial encounter
- D - subsequent encounter
- S - sequela
Source: ICD-10-CM Official Guidelines for Coding and Reporting, FY 2026, published by CMS and the National Center for Health Statistics.
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Blisters
Blisters are fluid-filled sacs on the outer layer of your skin. They form because of rubbing, heat, or diseases of the skin. They are most common on your hands and feet.
The full article covers:
- What are blisters?
- What causes blisters?
- What are the treatments for blisters?
- Can blisters be prevented?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert S30.824A to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About S30.824AOverview
Is S30.824A (Blister (nonthermal) of vagina and vulva) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report blister (nonthermal) of vagina and vulva, initial encounter on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What does the 7th character A in S30.824A mean?
The final character A marks the initial encounter: use it while the patient is receiving active treatment for blister (nonthermal) of vagina and vulva, such as an emergency visit or first evaluation.
What MS-DRG does S30.824A group to?
When blister (nonthermal) of vagina and vulva, initial encounter is the principal diagnosis on an inpatient stay, it groups to MS-DRG 606, 607, 963, 964, 965, with relative weights from 0.9064 to 2.7338 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of S30.824A?
Under the General Equivalence Mappings, blister (nonthermal) of vagina and vulva, initial encounter converts to ICD-9-CM 911.2 (blister trunk). The mapping is approximate, so confirm the match fits the documentation.
Footnotes
[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.
