S62.399K Other fracture of unspecified metacarpal bone, subsequent encounter for fracture with nonunion

Billable ICD-10-CM code, FY2026.

Built from S62.399 with 7th character K (subsequent encounter for fracture with nonunion).

Applies from S62 Fracture at wrist and hand level

Excludes1 (never code together)

• traumatic amputation of wrist and hand (S68.-)

Excludes2 (not included here)

• fracture of distal parts of ulna and radius (S52.-)

7th character note

• The appropriate 7th character is to be added to each code from category S62

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 S62.3 Fracture of other and unspecified metacarpal bone

Excludes2 (not included here)

• fracture of first metacarpal bone (S62.2-)

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 S62.399K

Back-references to S62

• 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: S52 Fracture of forearm ("fracture at wrist and hand level (S62.-)")
• Type 1 Excludes: S61 Open wound of wrist, hand and fingers ("open fracture of wrist, hand and finger (S62.- with 7th character B)")
• Use Additional: S67 Crushing injury of wrist, hand and fingers ("fracture of wrist and hand (S62.-)")

Diagnosis Index entries for S62.399K

• Fracture, traumatic (abduction) (adduction) (separation) › metacarpal › specified NEC

Nearby codes

• S62.399 Other fracture of unspecified metacarpal bone
• S62.399A Other fracture of unspecified metacarpal bone, initial encounter for closed fracture
• S62.399B Other fracture of unspecified metacarpal bone, initial encounter for open fracture
• S62.399D Other fracture of unspecified metacarpal bone, subsequent encounter for fracture with routine healing
• S62.399G Other fracture of unspecified metacarpal bone, subsequent encounter for fracture with delayed healing
• S62.399K Other fracture of unspecified metacarpal bone, subsequent encounter for fracture with nonunion (this code)
• S62.399P Other fracture of unspecified metacarpal bone, subsequent encounter for fracture with malunion
• S62.399S Other fracture of unspecified metacarpal bone, sequela
• S62.5 Fracture of thumb
• S62.50 Fracture of unspecified phalanx of thumb
• S62.501 Fracture of unspecified phalanx of right thumb