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S82.51XQ ICD-10-CM Code: Displaced fracture of medial malleolus of right tibia, subsequent encounter for open fracture type I or II with malunion

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 564 — OTHER MUSCULOSKELETAL SYSTEM AND CONNECTIVE TISSUE DIAGNOSES WITH MCC (MDC 08)
  • MS-DRG 565 — OTHER MUSCULOSKELETAL SYSTEM AND CONNECTIVE TISSUE DIAGNOSES WITH CC (MDC 08)
  • MS-DRG 566 — OTHER MUSCULOSKELETAL SYSTEM AND CONNECTIVE TISSUE DIAGNOSES WITHOUT CC/MCC (MDC 08)

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.

Official Registry Overview & Definition

Displaced fracture of medial malleolus of right tibia, subsequent encounter for open fracture type I or II with malunion is a billable ICD-10-CM diagnosis code (S82.51Q).

Official Tabular Instructional Notes

Sequencing, inclusion, and exclusion notes published for S82.51XQ in the official ICD-10-CM tabular list.

Includes

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

  • fracture of malleolus

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 S82.51XQ name these codes. Each comparison page covers when the two can — or must not — be reported together.

Change history

No changes recorded for this code — unchanged since the FY2016 baseline of the change ledger.

Verify Before Coding

  • No Medicare Code Editor or MS-DRG Definitions Manual restrictions apply to this code.

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

Relationships & Classification

Other codes that name S82.51XQ 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.

6 Excludes1 notes across 2 chapters: M84.3 (via S82.-), M84.4 (via S82.-), S81 (via S82.-), S82.3 (via S82.5.-), S89.13 (via S82.5.-), S89.14 (via S82.5.-).

12 Excludes2 notes: S72 (via S82.-), 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)

Not on the CMS CC/MCC list — as a secondary diagnosis this code does not change MS-DRG severity.

Named in the grouper logic of 3 MS-DRGs: DRG 564 (MDC 08), DRG 565 (MDC 08), DRG 566 (MDC 08).

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

Clinical classification (AHRQ CCSR):INJ042 — Fracture of lower limb (except hip), subsequent 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.

S82.52XQ — Displaced fracture of medial malleolus of left tibia, subsequent encounter for open fracture type I or II with malunion (left)Compare S82.51XQ vs S82.52XQ →, S82.53XQ — Displaced fracture of medial malleolus of unspecified tibia, subsequent encounter for open fracture type I or II with malunion (unspecified)Compare S82.51XQ vs S82.53XQ →

Same injury, other encounter phase

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

S82.51XA — Displaced fracture of medial malleolus of right tibia, initial encounter for closed fracture Compare S82.51XQ vs S82.51XA →, S82.51XB — Displaced fracture of medial malleolus of right tibia, initial encounter for open fracture type I or II, S82.51XC — Displaced fracture of medial malleolus of right tibia, initial encounter for open fracture type IIIA, IIIB, or IIIC, S82.51XD — Displaced fracture of medial malleolus of right tibia, subsequent encounter for closed fracture with routine healing, S82.51XE — Displaced fracture of medial malleolus of right tibia, subsequent encounter for open fracture type I or II with routine healing, S82.51XF — Displaced fracture of medial malleolus of right tibia, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with routine healing, S82.51XG — Displaced fracture of medial malleolus of right tibia, subsequent encounter for closed fracture with delayed healing, S82.51XH — Displaced fracture of medial malleolus of right tibia, subsequent encounter for open fracture type I or II with delayed healing, S82.51XJ — Displaced fracture of medial malleolus of right tibia, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with delayed healing, S82.51XK — Displaced fracture of medial malleolus of right tibia, subsequent encounter for closed fracture with nonunion, S82.51XM — Displaced fracture of medial malleolus of right tibia, subsequent encounter for open fracture type I or II with nonunion, S82.51XN — Displaced fracture of medial malleolus of right tibia, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with nonunion, S82.51XP — Displaced fracture of medial malleolus of right tibia, subsequent encounter for closed fracture with malunion, S82.51XR — Displaced fracture of medial malleolus of right tibia, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with malunion, S82.51XS — Displaced fracture of medial malleolus of right tibia, sequela

Same clinical category (CCSR)

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

+4697 more

Contextual Map

Every relationship of S82.51XQ 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
  • S82.3 — Fracture of lower end of tibia [Excludes1](via S82.5.-): “fracture of medial malleolus alone (S82.5-)” · check together
  • S89.13 — Salter-Harris Type III physeal fracture of lower end of tibia [Excludes1](via S82.5.-): “fracture of medial malleolus (adult) (S82.5-)” · check together
  • S89.14 — Salter-Harris Type IV physeal fracture of lower end of tibia [Excludes1](via S82.5.-): “fracture of medial malleolus (adult) (S82.5-)” · check together

Referenced by Excludes2 notes (12)

  • S72 — Fracture of femur [Excludes2](via S82.-): “fracture of lower leg and ankle (S82.-)” · 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
  • S95 — Injury of blood vessels at ankle and foot level [Excludes2](via S82.-): “fracture of ankle and malleolus (S82.-)” · check together
  • and 4 more

Clinical classification (CCSR)

  • INJ042 — Fracture of lower limb (except hip), subsequent encounter [CCSR]

Potential MS-DRG

  • DRG 564 — OTHER MUSCULOSKELETAL SYSTEM AND CONNECTIVE TISSUE DIAGNOSES WITH MCC [MS-DRG]: “OTHER MUSCULOSKELETAL SYSTEM AND CONNECTIVE TISSUE DIAGNOSES WITH MCC (MDC 08)”
  • DRG 565 — OTHER MUSCULOSKELETAL SYSTEM AND CONNECTIVE TISSUE DIAGNOSES WITH CC [MS-DRG]: “OTHER MUSCULOSKELETAL SYSTEM AND CONNECTIVE TISSUE DIAGNOSES WITH CC (MDC 08)”
  • DRG 566 — OTHER MUSCULOSKELETAL SYSTEM AND CONNECTIVE TISSUE DIAGNOSES WITHOUT CC/MCC [MS-DRG]: “OTHER MUSCULOSKELETAL SYSTEM AND CONNECTIVE TISSUE DIAGNOSES WITHOUT CC/MCC (MDC 08)”

MDC crossing · procedures (18508)

  • 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.”
  • 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 18503 more

Nearest codes (40)

  • S82 — Fracture of lower leg, including ankle [Sibling]
  • S82.499N — Other fracture of shaft of unspecified fibula, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with nonunion [Sibling]
  • S82.499P — Other fracture of shaft of unspecified fibula, subsequent encounter for closed fracture with malunion [Sibling]
  • S82.499Q — Other fracture of shaft of unspecified fibula, subsequent encounter for open fracture type I or II with malunion [Sibling]
  • S82.499R — Other fracture of shaft of unspecified fibula, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with malunion [Sibling]
  • S82.499S — Other fracture of shaft of unspecified fibula, sequela [Sibling]
  • S82.5 — Fracture of medial malleolus [Sibling]
  • S82.51 — Displaced fracture of medial malleolus of right tibia [Sibling]
  • and 32 more

Frequently Asked Questions (FAQ) & Clinical Guidance

Does S82.51XQ 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 S82.51XQ in its code family, with their registry titles.

  • S82.51XJ — Displaced fracture of medial malleolus of right tibia, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with delayed healing
  • S82.51XK — Displaced fracture of medial malleolus of right tibia, subsequent encounter for closed fracture with nonunion
  • S82.51XM — Displaced fracture of medial malleolus of right tibia, subsequent encounter for open fracture type I or II with nonunion
  • S82.51XN — Displaced fracture of medial malleolus of right tibia, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with nonunion
  • S82.51XP — Displaced fracture of medial malleolus of right tibia, subsequent encounter for closed fracture with malunion
  • S82.51XR — Displaced fracture of medial malleolus of right tibia, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with malunion
  • S82.51XS — Displaced fracture of medial malleolus of right tibia, sequela
  • S82.52 — Displaced fracture of medial malleolus of left tibia
  • S82.52XA — Displaced fracture of medial malleolus of left tibia, initial encounter for closed fracture
  • S82.52XB — Displaced fracture of medial malleolus of left tibia, initial encounter for open fracture type I or II

View all codes in the S82 family