Q82.2 ICD-10-CM Code: Congenital cutaneous mastocytosis
HCC Buddy Code Card
Digital ICD-10 code-book layout with official code detail, always-visible risk models, Code Trumping, and Buddy coding guidance.
FY 2026 Apr update / Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0) / Other congenital malformations (Q80-Q89)
Q82.2
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceCongenital cutaneous mastocytosis
A congenital condition where mast cells accumulate abnormally in the skin, causing brown spots or lesions that are present from birth.
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 diffuse cutaneous mastocytosis
- Congenital maculopapular cutaneous mastocytosis
- Congenital urticaria pigmentosa
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for Q82.2 in this effective period.
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for Q82.2 in this effective period.
Excludes 1
Official- cutaneous mastocytosis NOS (D47.01)
- diffuse cutaneous mastocytosis (with onset after newborn period) (D47.01)
- malignant mastocytosis (C96.2-)
- systemic mastocytosis (D47.02)
- urticaria pigmentosa (non-congenital) (with onset after newborn period) (D47.01)
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for Q82.2 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for Q82.2 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for Q82.2 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 Q82.2 an HCC code?
No. Q82.2 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
- Code
- Q82.2
- Description
- Congenital cutaneous mastocytosis
- HCC (V28)
- No CMS-HCC V28 mapping
- RAF
- —
- Billable
- Yes
- Payment year
- 2026
Coder workflow notes
Get the V28 RAF + MEAT cheat sheet
One printable page: confirm a code's V28 HCC status, its RAF weight, and the MEAT your note needs to make it stick. Free, no card.
Free PDF. No card. Unsubscribe anytime.
This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).
What This Code Means
Q82.2 is the ICD-10-CM diagnosis code for congenital cutaneous mastocytosis. A congenital condition where mast cells accumulate abnormally in the skin, causing brown spots or lesions that are present from birth. Q82.2 sits in the ICD-10-CM chapter for congenital malformations, deformations and chromosomal abnormalities (q00-qa0), within the section covering other congenital malformations (q80-q89).
Q82.2 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.
Document the extent and distribution of skin involvement to support medical necessity.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for Q82.2 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Document the extent and distribution of skin involvement to support medical necessity
- •Distinguish from systemic mastocytosis which would require a different code