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S82.123C ICD-10-CM Code: Displaced fracture of lateral condyle of unspecified tibia, initial encounter for open fracture type IIIA, IIIB, or IIIC

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FY 2026 Apr update / Injury, poisoning and certain other consequences of external causes (S00-T88) / Injuries to the knee and lower leg (S80-S89)

S82.123C

Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidance

Displaced fracture of lateral condyle of unspecified tibia, initial encounter for open fracture type IIIA, IIIB, or IIIC

Displaced fracture of lateral condyle of unspecified tibia, initial encounter for open fracture type IIIA, IIIB, or IIIC

CMS-HCC V28

0

0

RAF 0

CMS-HCC V24

0

0

RAF 0

ACA/HHS

0

0

RAF 0

ESRD/PACE

0

0

RAF 0

RXHCC

0

0

RAF 0

Code Trumping

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Code Book Path

Official
S82.12Fracture of lateral condyle of tibia
S82.123Displaced fracture of lateral condyle of unspecified tibia
S82.123CDisplaced fracture of lateral condyle of unspecified tibia, initial encounter for open fracture type IIIA, IIIB, or IIIC

Inclusion Terms

Official

ICD-10-CM does not list inclusion terms for S82.123C in this effective period.

Excludes 2

Official

ICD-10-CM does not list Excludes 2 notes for S82.123C in this effective period.

Related Child Codes

Official
S82.123ADisplaced fracture of lateral condyle of unspecified tibia, initial encounter for closed fracture
S82.123BDisplaced fracture of lateral condyle of unspecified tibia, initial encounter for open fracture type I or II
S82.123DDisplaced fracture of lateral condyle of unspecified tibia, subsequent encounter for closed fracture with routine healing
S82.123EDisplaced fracture of lateral condyle of unspecified tibia, subsequent encounter for open fracture type I or II with routine healing
S82.123FDisplaced fracture of lateral condyle of unspecified tibia, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with routine healing

Includes

Official

ICD-10-CM does not list Includes notes for S82.123C in this effective period.

Excludes 1

Official

ICD-10-CM does not list Excludes 1 notes for S82.123C in this effective period.

Code First

Official

ICD-10-CM does not list Code First sequencing instructions for S82.123C in this effective period.

Use Additional

Official

ICD-10-CM does not list Use Additional Code instructions for S82.123C in this effective period.

Code Also

Official

ICD-10-CM does not list Code Also instructions for S82.123C in this effective period.

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 S82.123C an HCC code?

No. S82.123C 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

S82.123C is the ICD-10-CM diagnosis code for displaced fracture of lateral condyle of unspecified tibia, initial encounter for open fracture type iiia, iiib, or iiic. S82.123C sits in the ICD-10-CM chapter for injury, poisoning and certain other consequences of external causes (s00-t88), within the section covering injuries to the knee and lower leg (s80-s89).

S82.123C 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.

S82.123C is a billable ICD-10-CM code that can be reported on claims but does not currently contribute to a Medicare Advantage member's RAF score under any CMS risk adjustment model (V28, V24, ESRD, or RxHCC). Coders reviewing S82.123C should check whether additional documentation would support a more specific child code in the same hierarchy that does map to a payment HCC, capturing the correct specificity is the highest-impact RAF improvement available within accurate coding.

HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for S82.123C sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.

Child Codes

S82.123ADisplaced fracture of lateral condyle of unspecified tibia, initial encounter for closed fracture
S82.123BDisplaced fracture of lateral condyle of unspecified tibia, initial encounter for open fracture type I or II
S82.123CDisplaced fracture of lateral condyle of unspecified tibia, initial encounter for open fracture type IIIA, IIIB, or IIIC
S82.123DDisplaced fracture of lateral condyle of unspecified tibia, subsequent encounter for closed fracture with routine healing
S82.123EDisplaced fracture of lateral condyle of unspecified tibia, subsequent encounter for open fracture type I or II with routine healing
S82.123FDisplaced fracture of lateral condyle of unspecified tibia, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with routine healing
S82.123GDisplaced fracture of lateral condyle of unspecified tibia, subsequent encounter for closed fracture with delayed healing
S82.123HDisplaced fracture of lateral condyle of unspecified tibia, subsequent encounter for open fracture type I or II with delayed healing
S82.123JDisplaced fracture of lateral condyle of unspecified tibia, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with delayed healing
S82.123KDisplaced fracture of lateral condyle of unspecified tibia, subsequent encounter for closed fracture with nonunion
S82.123MDisplaced fracture of lateral condyle of unspecified tibia, subsequent encounter for open fracture type I or II with nonunion
S82.123NDisplaced fracture of lateral condyle of unspecified tibia, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with nonunion
S82.123PDisplaced fracture of lateral condyle of unspecified tibia, subsequent encounter for closed fracture with malunion
S82.123QDisplaced fracture of lateral condyle of unspecified tibia, subsequent encounter for open fracture type I or II with malunion
S82.123RDisplaced fracture of lateral condyle of unspecified tibia, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with malunion
S82.123SDisplaced fracture of lateral condyle of unspecified tibia, sequela

Code Hierarchy

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