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S82.65XC ICD-10-CM Code: Nondisplaced fracture of lateral malleolus of left fibula, initial encounter for open fracture type IIIA, IIIB, or IIIC

Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.

Inpatient Payment Groups (MS-DRG)

MS-DRGs this diagnosis helps define, as principal or secondary, per the CMS ICD-10-CM/PCS MS-DRG Definitions Manual v43.0, Appendix B.

  • MS-DRG 562 — FRACTURE, SPRAIN, STRAIN AND DISLOCATION EXCEPT FEMUR, HIP, PELVIS AND THIGH WITH MCC (MDC 08)
  • MS-DRG 563 — FRACTURE, SPRAIN, STRAIN AND DISLOCATION EXCEPT FEMUR, HIP, PELVIS AND THIGH WITHOUT MCC (MDC 08)
  • MS-DRG 963 — OTHER MULTIPLE SIGNIFICANT TRAUMA WITH MCC (MDC 24)
  • MS-DRG 964 — OTHER MULTIPLE SIGNIFICANT TRAUMA WITH CC (MDC 24)
  • MS-DRG 965 — OTHER MULTIPLE SIGNIFICANT TRAUMA WITHOUT CC/MCC (MDC 24)

A diagnosis appearing in a group's logic does not by itself determine the DRG assigned to a stay; the grouper uses the full claim.

Code Overview

Nondisplaced fracture of lateral malleolus of left fibula, initial encounter for open fracture type IIIA, IIIB, or IIIC is a billable ICD-10-CM diagnosis code (S82.65C).

Summary composed by MedCoder from this code's official ICD-10-CM record. The tabular instructional notes themselves appear verbatim below.

Official Tabular Instructional Notes

Sequencing, inclusion, and exclusion notes published for S82.65XC in the official ICD-10-CM tabular list.

Includes

Conditions the official ICD-10-CM tabular list includes under this code.

  • fracture of malleolus inherited from S82

Excludes1 — Not Coded Here

Conditions generally not reported together with this code (Excludes1) -- an error unless the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).

Excludes2 — Not Included Here

Conditions not covered by this code, but which may be reported alongside it when both are present.

Frequently Compared Codes

The official Excludes notes on S82.65XC name these codes. Each comparison page covers when the two can — or must not — be reported together.

Change history

  • FY2016 — 2015-10-01
    In the code set at ICD-10-CM adoption
    Nondisplaced fracture of lateral malleolus of left fibula, initial encounter for open fracture type IIIA, IIIB, or IIIC

Verify Before Coding

  • CC as a secondary diagnosis (FY2026). Can raise the stay's MS-DRG severity tier.

From the code registry, the Medicare Code Editor, and the MS-DRG Definitions Manual. Check it against a full claim in Claim Check.

Relationships & Classification

Other codes that name S82.65XC or its code family, from the CMS ICD-10-CM tabular instructional notes. Tabular-note edges are stored at the code family level that carries each note.

3 Excludes1 notes across 2 chapters: M84.3 (via S82.-), M84.4 (via S82.-), S81 (via S82.-).

13 Excludes2 notes: S72 (via S82.-), S82.4 (via S82.6.-), S90 (via S82.-), S90-S99 (via S82.-), S91 (via S82.-), S92 (via S82.-), S93 (via S82.-), S94 (via S82.-), S95 (via S82.-), S96 (via S82.-), S97 (via S82.-), S98 (via S82.-), S99 (via S82.-).

Potential MS-DRG Relationships (FY2026)

CC — Complication or Comorbidity. Reported as a secondary diagnosis, this code raises the stay's MS-DRG severity tier — except when the principal diagnosis is one of 329 clinically related codes on its CMS exclusion list.

Named in the grouper logic of 5 MS-DRGs: DRG 562 (MDC 08), DRG 563 (MDC 08), DRG 963 (MDC 24), DRG 964 (MDC 24), DRG 965 (MDC 24).

From the CMS MS-DRG Definitions Manual (Appendices B and C). Actual DRG assignment depends on the complete claim.

Clinical classification (AHRQ CCSR):INJ005 — Fracture of the lower limb (except hip), initial encounter (default).

Clinical Classifications Software Refined (CCSR) for ICD-10-CM Diagnoses. Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality.

Related Codes

Same condition, opposite side

Same category and title, differing only in which side of the body is affected.

S82.66XC — Nondisplaced fracture of lateral malleolus of unspecified fibula, initial encounter for open fracture type IIIA, IIIB, or IIIC (unspecified)Compare S82.65XC vs S82.66XC →, S82.64XC — Nondisplaced fracture of lateral malleolus of right fibula, initial encounter for open fracture type IIIA, IIIB, or IIIC (right)Compare S82.65XC vs S82.64XC →

Same injury, other encounter phase

Same injury, coded at a different phase of treatment via the 7th character.

S82.65XA — Nondisplaced fracture of lateral malleolus of left fibula, initial encounter for closed fracture Compare S82.65XC vs S82.65XA →, S82.65XB — Nondisplaced fracture of lateral malleolus of left fibula, initial encounter for open fracture type I or II, S82.65XD — Nondisplaced fracture of lateral malleolus of left fibula, subsequent encounter for closed fracture with routine healing, S82.65XE — Nondisplaced fracture of lateral malleolus of left fibula, subsequent encounter for open fracture type I or II with routine healing, S82.65XF — Nondisplaced fracture of lateral malleolus of left fibula, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with routine healing, S82.65XG — Nondisplaced fracture of lateral malleolus of left fibula, subsequent encounter for closed fracture with delayed healing, S82.65XH — Nondisplaced fracture of lateral malleolus of left fibula, subsequent encounter for open fracture type I or II with delayed healing, S82.65XJ — Nondisplaced fracture of lateral malleolus of left fibula, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with delayed healing, S82.65XK — Nondisplaced fracture of lateral malleolus of left fibula, subsequent encounter for closed fracture with nonunion, S82.65XM — Nondisplaced fracture of lateral malleolus of left fibula, subsequent encounter for open fracture type I or II with nonunion, S82.65XN — Nondisplaced fracture of lateral malleolus of left fibula, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with nonunion, S82.65XP — Nondisplaced fracture of lateral malleolus of left fibula, subsequent encounter for closed fracture with malunion, S82.65XQ — Nondisplaced fracture of lateral malleolus of left fibula, subsequent encounter for open fracture type I or II with malunion, S82.65XR — Nondisplaced fracture of lateral malleolus of left fibula, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with malunion, S82.65XS — Nondisplaced fracture of lateral malleolus of left fibula, sequela

Same clinical category (CCSR)

AHRQ's Clinical Classifications Software groups these diagnoses under the same clinical category (Fracture of the lower limb (except hip), initial encounter).

+1430 more

Contextual Map

Every relationship of S82.65XC in one view: hierarchy, official tabular instructions in both directions, clinical classification, risk adjustment, MS-DRG participation, index terms and change history — each edge carrying the CMS source it derives from.

Hierarchy

  • S00-T88 — Chapter 19: Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88) (S00-T88) [Hierarchy]
  • S80-S89 — Injuries to the knee and lower leg [Hierarchy]

Referenced by Excludes1 notes

  • M84.3 — Stress fracture [Excludes1](via S82.-): “traumatic fracture (S12.-, S22.-, S32.-, S42.-, S52.-, S62.-, S72.-, S82.-, S92.-)” · check together
  • M84.4 — Pathological fracture, not elsewhere classified [Excludes1](via S82.-): “traumatic fracture (S12.-, S22.-, S32.-, S42.-, S52.-, S62.-, S72.-, S82.-, S92.-)” · check together
  • S81 — Open wound of knee and lower leg [Excludes1](via S82.-): “open fracture of knee and lower leg (S82.-)” · check together

Referenced by Excludes2 notes (13)

  • S72 — Fracture of femur [Excludes2](via S82.-): “fracture of lower leg and ankle (S82.-)” · check together
  • S82.4 — Fracture of shaft of fibula [Excludes2](via S82.6.-): “fracture of lateral malleolus alone (S82.6-)” · check together
  • S90 — Superficial injury of ankle, foot and toes [Excludes2](via S82.-): “fracture of ankle and malleolus (S82.-)” · check together
  • S90-S99 — Injuries to the ankle and foot (S90-S99) [Excludes2](via S82.-): “fracture of ankle and malleolus (S82.-)” · check together
  • S91 — Open wound of ankle, foot and toes [Excludes2](via S82.-): “fracture of ankle and malleolus (S82.-)” · check together
  • S92 — Fracture of foot and toe, except ankle [Excludes2](via S82.-): “fracture of ankle (S82.-)” · check together
  • S93 — Dislocation and sprain of joints and ligaments at ankle, foot and toe level [Excludes2](via S82.-): “fracture of ankle and malleolus (S82.-)” · check together
  • S94 — Injury of nerves at ankle and foot level [Excludes2](via S82.-): “fracture of ankle and malleolus (S82.-)” · check together
  • and 5 more

Clinical classification (CCSR)

  • INJ005 — Fracture of the lower limb (except hip), initial encounter [CCSR]

Potential MS-DRG

  • CC — Complication or Comorbidity [MS-DRG severity]: “As a secondary diagnosis this code can raise the stay's MS-DRG severity tier (CC).”
  • DRG 562 — FRACTURE, SPRAIN, STRAIN AND DISLOCATION EXCEPT FEMUR, HIP, PELVIS AND THIGH WITH MCC [MS-DRG]: “FRACTURE, SPRAIN, STRAIN AND DISLOCATION EXCEPT FEMUR, HIP, PELVIS AND THIGH WITH MCC (MDC 08)”
  • DRG 563 — FRACTURE, SPRAIN, STRAIN AND DISLOCATION EXCEPT FEMUR, HIP, PELVIS AND THIGH WITHOUT MCC [MS-DRG]: “FRACTURE, SPRAIN, STRAIN AND DISLOCATION EXCEPT FEMUR, HIP, PELVIS AND THIGH WITHOUT MCC (MDC 08)”
  • DRG 963 — OTHER MULTIPLE SIGNIFICANT TRAUMA WITH MCC [MS-DRG]: “OTHER MULTIPLE SIGNIFICANT TRAUMA WITH MCC (MDC 24)”
  • DRG 964 — OTHER MULTIPLE SIGNIFICANT TRAUMA WITH CC [MS-DRG]: “OTHER MULTIPLE SIGNIFICANT TRAUMA WITH CC (MDC 24)”
  • DRG 965 — OTHER MULTIPLE SIGNIFICANT TRAUMA WITHOUT CC/MCC [MS-DRG]: “OTHER MULTIPLE SIGNIFICANT TRAUMA WITHOUT CC/MCC (MDC 24)”

MDC crossing · procedures (41465)

  • MDC 08 — Diseases and Disorders of the Musculoskeletal System and Connective Tissue [MDC crossing]: “Diseases and Disorders of the Musculoskeletal System and Connective Tissue — the grouper's crossing between diagnoses and procedures: a principal diagnosis sets the MDC, and same-MDC procedures move the stay to its surgical DRGs.”
  • MDC 24 — Multiple Significant Trauma [MDC crossing]: “Multiple Significant Trauma — the grouper's crossing between diagnoses and procedures: a principal diagnosis sets the MDC, and same-MDC procedures move the stay to its surgical DRGs.”
  • 005T0ZZ — Destruction of Spinal Meninges, Open Approach [Same-MDC procedure]: “Destruction of Spinal Meninges, Open Approach — grouped in MDC 08, the procedure side of this code's crossing.” · check together
  • 005T3ZZ — Destruction of Spinal Meninges, Percutaneous Approach [Same-MDC procedure]: “Destruction of Spinal Meninges, Percutaneous Approach — grouped in MDC 08, the procedure side of this code's crossing.” · check together
  • 005T4ZZ — Destruction of Spinal Meninges, Percutaneous Endoscopic Approach [Same-MDC procedure]: “Destruction of Spinal Meninges, Percutaneous Endoscopic Approach — grouped in MDC 08, the procedure side of this code's crossing.” · check together
  • 005W0Z3 — Destruction of Cervical Spinal Cord using Laser Interstitial Thermal Therapy, Open Approach [Same-MDC procedure]: “Destruction of Cervical Spinal Cord using Laser Interstitial Thermal Therapy, Open Approach — grouped in MDC 08, the procedure side of this code's crossing.” · check together
  • 005W0ZZ — Destruction of Cervical Spinal Cord, Open Approach [Same-MDC procedure]: “Destruction of Cervical Spinal Cord, Open Approach — grouped in MDC 08, the procedure side of this code's crossing.” · check together
  • and 41460 more

Nearest codes (40)

  • S82 — Fracture of lower leg, including ankle [Sibling]
  • S82.64 — Nondisplaced fracture of lateral malleolus of right fibula [Sibling]
  • S82.64XA — Nondisplaced fracture of lateral malleolus of right fibula, initial encounter for closed fracture [Sibling]
  • S82.64XB — Nondisplaced fracture of lateral malleolus of right fibula, initial encounter for open fracture type I or II [Sibling]
  • S82.64XC — Nondisplaced fracture of lateral malleolus of right fibula, initial encounter for open fracture type IIIA, IIIB, or IIIC [Sibling]
  • S82.64XD — Nondisplaced fracture of lateral malleolus of right fibula, subsequent encounter for closed fracture with routine healing [Sibling]
  • S82.64XE — Nondisplaced fracture of lateral malleolus of right fibula, subsequent encounter for open fracture type I or II with routine healing [Sibling]
  • S82.64XF — Nondisplaced fracture of lateral malleolus of right fibula, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with routine healing [Sibling]
  • and 32 more

Change history

  • FY2016 — In the code set at ICD-10-CM adoption [Change history]

Frequently Asked Questions (FAQ) & Clinical Guidance

Does S82.65XC require a 7th character?

Yes. The appropriate 7th character is to be added to all codes from category S82.

Nearest Codes in This Family

Official ICD-10-CM classifications closest to S82.65XC in its code family, with their registry titles.

  • S82.64XR — Nondisplaced fracture of lateral malleolus of right fibula, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with malunion
  • S82.64XS — Nondisplaced fracture of lateral malleolus of right fibula, sequela
  • S82.65 — Nondisplaced fracture of lateral malleolus of left fibula
  • S82.65XA — Nondisplaced fracture of lateral malleolus of left fibula, initial encounter for closed fracture
  • S82.65XB — Nondisplaced fracture of lateral malleolus of left fibula, initial encounter for open fracture type I or II
  • S82.65XD — Nondisplaced fracture of lateral malleolus of left fibula, subsequent encounter for closed fracture with routine healing
  • S82.65XE — Nondisplaced fracture of lateral malleolus of left fibula, subsequent encounter for open fracture type I or II with routine healing
  • S82.65XF — Nondisplaced fracture of lateral malleolus of left fibula, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with routine healing
  • S82.65XG — Nondisplaced fracture of lateral malleolus of left fibula, subsequent encounter for closed fracture with delayed healing
  • S82.65XH — Nondisplaced fracture of lateral malleolus of left fibula, subsequent encounter for open fracture type I or II with delayed healing

View all codes in the S82 family