QA0.0102 ICD-10-CM Code: CACNA1A-related neurodevelopmental disorder
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) / Genetic disorders, not elsewhere classified (QA0)
QA0.0102
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceCACNA1A-related neurodevelopmental disorder
A developmental disorder caused by mutations in the CACNA1A gene, which affects calcium channels in the brain and can result in developmental delays, movement disorders, or seizures.
CMS-HCC V28
N/A—
Not mapped
CMS-HCC V24
N/A—
Not mapped
ACA/HHS
MappedHCC 97
Varies by metal level
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 QA0.0102 in this effective period.
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for QA0.0102 in this effective period.
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for QA0.0102 in this effective period.
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for QA0.0102 in this effective period.
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for QA0.0102 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for QA0.0102 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for QA0.0102 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 QA0.0102 an HCC code?
No. QA0.0102 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
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
QA0.0102 is the ICD-10-CM diagnosis code for cacna1a-related neurodevelopmental disorder. A developmental disorder caused by mutations in the CACNA1A gene, which affects calcium channels in the brain and can result in developmental delays, movement disorders, or seizures. QA0.0102 sits in the ICD-10-CM chapter for congenital malformations, deformations and chromosomal abnormalities (q00-qa0), within the section covering genetic disorders, not elsewhere classified (qa0).
QA0.0102 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.
Confirm genetic testing documentation for CACNA1A pathogenic variant before coding.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for QA0.0102 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Confirm genetic testing documentation for CACNA1A pathogenic variant before coding
- •Link this code with manifestation codes such as seizure disorder or ataxia when present