S92.406K Nondisplaced unspecified fracture of unspecified great toe, subsequent encounter for fracture with nonunion

Billable ICD-10-CM code, FY2026.

Built from S92.406 with 7th character K (subsequent encounter for fracture with nonunion).

Applies from S92 Fracture of foot and toe, except ankle

Excludes2 (not included here)

• fracture of ankle (S82.-)
• fracture of malleolus (S82.-)
• traumatic amputation of ankle and foot (S98.-)

7th character note

• The appropriate 7th character is to be added to each code from category S92

Notes

• A fracture not indicated as displaced or nondisplaced should be coded to displaced
• A fracture not indicated as open or closed should be coded to closed

7th character required

• A — initial encounter for closed fracture
• B — initial encounter for open fracture
• D — subsequent encounter for fracture with routine healing
• G — subsequent encounter for fracture with delayed healing
• K — subsequent encounter for fracture with nonunion
• P — subsequent encounter for fracture with malunion
• S — sequela

Applies from S92.4 Fracture of great toe

Excludes2 (not included here)

• Physeal fracture of phalanx of toe (S99.2-)

Medicare Code Edits (MCE v43.1 (April 2026))

• Unspecified code (laterality): Unspecified codes for which a more specific code identifying laterality (right, left, bilateral) exists within the same code family.

Code annotations containing back-references to S92.406K

Back-references to S92

• Type 1 Excludes: M84.3 Stress fracture ("traumatic fracture (S12.-, S22.-, S32.-, S42.-, S52.-, S62.-, S72.-, S82.-, S92.-)")
• Type 1 Excludes: M84.4 Pathological fracture, not elsewhere classified ("traumatic fracture (S12.-, S22.-, S32.-, S42.-, S52.-, S62.-, S72.-, S82.-, S92.-)")
• Type 2 Excludes: S72 Fracture of femur ("fracture of foot (S92.-)")
• Type 2 Excludes: S82 Fracture of lower leg, including ankle ("fracture of foot, except ankle (S92.-)")
• Type 1 Excludes: S91 Open wound of ankle, foot and toes ("open fracture of ankle, foot and toes (S92.-with 7th character B)")

Nearby codes

• S92.406 Nondisplaced unspecified fracture of unspecified great toe
• S92.406A Nondisplaced unspecified fracture of unspecified great toe, initial encounter for closed fracture
• S92.406B Nondisplaced unspecified fracture of unspecified great toe, initial encounter for open fracture
• S92.406D Nondisplaced unspecified fracture of unspecified great toe, subsequent encounter for fracture with routine healing
• S92.406G Nondisplaced unspecified fracture of unspecified great toe, subsequent encounter for fracture with delayed healing
• S92.406K Nondisplaced unspecified fracture of unspecified great toe, subsequent encounter for fracture with nonunion (this code)
• S92.406P Nondisplaced unspecified fracture of unspecified great toe, subsequent encounter for fracture with malunion
• S92.406S Nondisplaced unspecified fracture of unspecified great toe, sequela
• S92.41 Fracture of proximal phalanx of great toe
• S92.411 Displaced fracture of proximal phalanx of right great toe
• S92.411A Displaced fracture of proximal phalanx of right great toe, initial encounter for closed fracture