R10.8A9 ICD-10-CM Code: Flank tenderness, unspecified
R10.8A9 is not a CMS-HCC payment code. MEAT criteria · RAF Calculator · HCC coding software
HCC Buddy Code Card
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FY 2026 Apr update / Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99) / Symptoms and signs involving the digestive system and abdomen (R10-R19)
R10.8A9
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceFlank tenderness, unspecified
Tenderness or pain felt on the side of the abdomen (flank area), but the specific side (right or left) is not documented.
CMS-HCC V28
N/A—
Not mapped
CMS-HCC V24
HistoricalHistorical
Not used for CY2026 payment
ACA/HHS
N/A—
Not mapped
ESRD/PACE
N/A—
Not mapped
RXHCC
N/A—
Not mapped
Code Book Path
Inclusion Terms
Official- Flank tenderness NOS
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for R10.8A9 in this effective period.
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for R10.8A9 in this effective period.
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for R10.8A9 in this effective period.
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for R10.8A9 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for R10.8A9 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for R10.8A9 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 R10.8A9 an HCC code?
No. R10.8A9 is a billable ICD-10-CM code with no mapping under the CMS-HCC V28 or V24 community payment models, and none under the ESRD, Part D RxHCC, or HHS-HCC models.
- Code
- R10.8A9
- Description
- Flank tenderness, unspecified
- HCC (V28)
- No CMS-HCC V28 mapping
- RAF reference coefficient
- —
- 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
R10.8A9 is the ICD-10-CM diagnosis code for flank tenderness, unspecified. Tenderness or pain felt on the side of the abdomen (flank area), but the specific side (right or left) is not documented. R10.8A9 sits in the ICD-10-CM chapter for symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (r00-r99), within the section covering symptoms and signs involving the digestive system and abdomen (r10-r19).
R10.8A9 is a billable ICD-10-CM code, but the current payload does not show a mapping under the CMS-HCC V28 or V24 community payment models, and none under the ESRD, Part D RxHCC, or HHS-HCC models. Do not assign risk adjustment value from this page when no source-backed mapping is shown; verify the applicable model and payment year.
Use this code only when laterality cannot be determined from documentation.
HCC Buddy maintains structured V28 and V24 mapping, source-labeled coefficient references, and MEAT documentation criteria for R10.8A9 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 laterality cannot be determined from documentation
- •Query the provider to specify right versus left flank for more precise coding when possible