F80.1 ICD-10-CM Code: Expressive language 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 / Mental, Behavioral and Neurodevelopmental disorders (F01-F99) / Pervasive and specific developmental disorders (F80-F89)
F80.1
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceExpressive language disorder
A language disorder where a child has difficulty expressing thoughts and ideas through speech, though they may understand language better than they can produce it. Vocabulary and sentence formation are affected.
CMS-HCC V28
00
RAF 0
CMS-HCC V24
00
RAF 0
ACA/HHS
00
RAF 0
ESRD/PACE
00
RAF 0
RXHCC
00
RAF 0
Code Trumping
Basket needed
Code Book Path
Inclusion Terms
Official- Developmental dysphasia or aphasia, expressive type
Excludes 2
Official- acquired aphasia with epilepsy [Landau-Kleffner] (G40.80-)
- selective mutism (F94.0)
- intellectual disabilities (F70-F79)
- pervasive developmental disorders (F84.-)
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for F80.1 in this effective period.
Excludes 1
Official- mixed receptive-expressive language disorder (F80.2)
- dysphasia and aphasia NOS (R47.-)
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for F80.1 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for F80.1 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for F80.1 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 F80.1 an HCC code?
No. F80.1 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).
What This Code Means
F80.1 is the ICD-10-CM diagnosis code for expressive language disorder. A language disorder where a child has difficulty expressing thoughts and ideas through speech, though they may understand language better than they can produce it. Vocabulary and sentence formation are affected. F80.1 sits in the ICD-10-CM chapter for mental, behavioral and neurodevelopmental disorders (f01-f99), within the section covering pervasive and specific developmental disorders (f80-f89).
F80.1 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.
Distinguish from receptive language disorder; expressive disorder specifically affects speech production and language output.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for F80.1 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Distinguish from receptive language disorder; expressive disorder specifically affects speech production and language output
- •Document standardized language assessment scores when available to support severity and medical necessity