S82.66XJ ICD-10-CM Code: Nondisplaced fracture of lateral malleolus of unspecified fibula, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with delayed healing
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 (FY2026), Appendix B.
- MS-DRG 559 — AFTERCARE, MUSCULOSKELETAL SYSTEM AND CONNECTIVE TISSUE WITH MCC (MDC 08)
- MS-DRG 560 — AFTERCARE, MUSCULOSKELETAL SYSTEM AND CONNECTIVE TISSUE WITH CC (MDC 08)
- MS-DRG 561 — AFTERCARE, MUSCULOSKELETAL SYSTEM AND CONNECTIVE TISSUE 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.
Code Set: Valid FY2026 and FY2027. FY2026 took effect October 1, 2025.
Official Registry Overview & Definition
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for S82.66XJ 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 that can never be reported with this code; the two are mutually exclusive.
- pilon fracture of distal tibia (S82.87-)
- traumatic amputation of lower leg (S88.-)
Excludes2 — Not Included Here
Conditions not covered by this code, but which may be reported alongside it when both are present.
- fracture of foot, except ankle (S92.-)
- periprosthetic fracture around internal prosthetic ankle joint (M97.2)
- periprosthetic fracture around internal prosthetic implant of knee joint (M97.1-)
- burns and corrosions (T20-T32)
- frostbite (T33-T34)
- injuries of ankle and foot, except fracture of ankle and malleolus (S90-S99)
- insect bite or sting, venomous (T63.4)
Frequently Asked Questions (FAQ) & Clinical Guidance
Does S82.66XJ 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 S82.66XJ in its code family, with their registry titles.
- S82.66XD — Nondisplaced fracture of lateral malleolus of unspecified fibula, subsequent encounter for closed fracture with routine healing
- S82.66XE — Nondisplaced fracture of lateral malleolus of unspecified fibula, subsequent encounter for open fracture type I or II with routine healing
- S82.66XF — Nondisplaced fracture of lateral malleolus of unspecified fibula, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with routine healing
- S82.66XG — Nondisplaced fracture of lateral malleolus of unspecified fibula, subsequent encounter for closed fracture with delayed healing
- S82.66XH — Nondisplaced fracture of lateral malleolus of unspecified fibula, subsequent encounter for open fracture type I or II with delayed healing
- S82.66XK — Nondisplaced fracture of lateral malleolus of unspecified fibula, subsequent encounter for closed fracture with nonunion
- S82.66XM — Nondisplaced fracture of lateral malleolus of unspecified fibula, subsequent encounter for open fracture type I or II with nonunion
- S82.66XN — Nondisplaced fracture of lateral malleolus of unspecified fibula, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with nonunion
- S82.66XP — Nondisplaced fracture of lateral malleolus of unspecified fibula, subsequent encounter for closed fracture with malunion
- S82.66XQ — Nondisplaced fracture of lateral malleolus of unspecified fibula, subsequent encounter for open fracture type I or II with malunion