Q75.029 ICD-10-CM Code: Coronal craniosynostosis, unspecified
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FY 2026 Apr update / Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0) / Congenital malformations and deformations of the musculoskeletal system (Q65-Q79)
Q75.029
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceCoronal craniosynostosis, unspecified
A birth defect where the coronal suture (seam across the front of the skull) fuses prematurely, but whether it affects one or both sides is not specified.
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 Q75.029 in this effective period.
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for Q75.029 in this effective period.
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for Q75.029 in this effective period.
Excludes 1
Official- dolichocephaly (Q67.2)
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for Q75.029 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for Q75.029 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for Q75.029 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 Q75.029 an HCC code?
No. Q75.029 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
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
Q75.029 is the ICD-10-CM diagnosis code for coronal craniosynostosis, unspecified. A birth defect where the coronal suture (seam across the front of the skull) fuses prematurely, but whether it affects one or both sides is not specified. Q75.029 sits in the ICD-10-CM chapter for congenital malformations, deformations and chromosomal abnormalities (q00-qa0), within the section covering congenital malformations and deformations of the musculoskeletal system (q65-q79).
Q75.029 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 coronal involvement is confirmed but laterality is not documented.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for Q75.029 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 coronal involvement is confirmed but laterality is not documented
- •Query imaging reports or surgical notes to determine if unilateral or bilateral for more specific coding