Q89.1 ICD-10-CM Code: Congenital malformations of adrenal gland
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)
Q89.1
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceCongenital malformations of adrenal gland
Congenital malformations of the adrenal gland include abnormal development, absence, or structural problems of these hormone-producing glands 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
OfficialICD-10-CM does not list inclusion terms for Q89.1 in this effective period.
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for Q89.1 in this effective period.
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for Q89.1 in this effective period.
Excludes 1
Official- adrenogenital disorders (E25.-)
- congenital adrenal hyperplasia (E25.0)
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for Q89.1 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for Q89.1 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for Q89.1 in this effective period.
Buddy Documentation Tip
Last updated: FY2026 ICD-10-CM Apr update, Apr 1, 2026 through Sep 30, 2026. CMS-HCC V28 is 100% phased in for payment year 2026.
Is Q89.1 an HCC code?
No. Q89.1 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
- Code
- Q89.1
- Description
- Congenital malformations of adrenal gland
- 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
Q89.1 is the ICD-10-CM diagnosis code for congenital malformations of adrenal gland. Congenital malformations of the adrenal gland include abnormal development, absence, or structural problems of these hormone-producing glands present from birth. Q89.1 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).
Q89.1 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 whether the malformation affects hormone production and code any resulting endocrine disorders separately.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for Q89.1 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Document whether the malformation affects hormone production and code any resulting endocrine disorders separately
- •Specify if unilateral or bilateral involvement when documented