Q52.79 ICD-10-CM Code: Other congenital malformations of vulva
HCC Buddy Code Card
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FY 2026 Apr update / Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0) / Congenital malformations of genital organs (Q50-Q56)
Q52.79
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceOther congenital malformations of vulva
Other birth defects of the vulva that are not specifically classified elsewhere, such as cysts, duplications, or structural abnormalities.
CMS-HCC V28
N/A—
Not mapped
CMS-HCC V24
N/A—
Not mapped
ACA/HHS
N/A—
Not mapped
ESRD/PACE
N/A—
Not mapped
RXHCC
N/A—
Not mapped
Code Book Path
Inclusion Terms
Official- Congenital cyst of vulva
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for Q52.79 in this effective period.
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for Q52.79 in this effective period.
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for Q52.79 in this effective period.
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for Q52.79 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for Q52.79 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for Q52.79 in this effective period.
Buddy Documentation Tip
Current with CMS: FY2026 ICD-10-CM Apr 1 update (effective Apr 1 – Sep 30, 2026) · CMS-HCC V28, 100% phased in for payment year 2026. FY2027 code set already staged for October 1, 2026. How HCC Buddy stays current →
Is Q52.79 an HCC code?
No. Q52.79 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
- Code
- Q52.79
- Description
- Other congenital malformations of vulva
- HCC (V28)
- No CMS-HCC V28 mapping
- RAF
- —
- Billable
- Yes
- Payment year
- 2026
Coder workflow notes
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This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).
What This Code Means
Q52.79 is the ICD-10-CM diagnosis code for other congenital malformations of vulva. Other birth defects of the vulva that are not specifically classified elsewhere, such as cysts, duplications, or structural abnormalities. Q52.79 sits in the ICD-10-CM chapter for congenital malformations, deformations and chromosomal abnormalities (q00-qa0), within the section covering congenital malformations of genital organs (q50-q56).
Q52.79 is a billable ICD-10-CM code but does not map to a payment HCC under the CMS-HCC V28, V24, ESRD, or RxHCC risk adjustment models. It can be reported on Medicare Advantage encounter data submissions but it does not contribute to a beneficiary's RAF score and therefore does not affect risk-adjusted payments to the plan.
Use this code only when the specific vulvar malformation doesn't fit other Q52.7x codes.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for Q52.79 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Use this code only when the specific vulvar malformation doesn't fit other Q52.7x codes
- •Document the specific type of malformation in the medical record for clarity and future reference