S42.231B 3-part fracture of surgical neck of right humerus, initial encounter for open fracture

Billable ICD-10-CM code, FY2026.

Built from S42.231 with 7th character B (initial encounter for open fracture).

Applies from S42 Fracture of shoulder and upper arm

Excludes1 (never code together)

• traumatic amputation of shoulder and upper arm (S48.-)

Excludes2 (not included here)

• periprosthetic fracture around internal prosthetic shoulder joint (M97.3)

7th character note

• The appropriate 7th character is to be added to all codes from category S42

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 S42.2 Fracture of upper end of humerus

Applicable to

• Fracture of proximal end of humerus

Excludes2 (not included here)

• fracture of shaft of humerus (S42.3-)
• physeal fracture of upper end of humerus (S49.0-)

Code annotations containing back-references to S42.231B

Back-references to S42

• 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: S41 Open wound of shoulder and upper arm ("open fracture of shoulder and upper arm (S42.- with 7th character B or C)")

Nearby codes

• S42.226P 2-part nondisplaced fracture of surgical neck of unspecified humerus, subsequent encounter for fracture with malunion
• S42.226S 2-part nondisplaced fracture of surgical neck of unspecified humerus, sequela
• S42.23 3-part fracture of surgical neck of humerus
• S42.231 3-part fracture of surgical neck of right humerus
• S42.231A 3-part fracture of surgical neck of right humerus, initial encounter for closed fracture
• S42.231B 3-part fracture of surgical neck of right humerus, initial encounter for open fracture (this code)
• S42.231D 3-part fracture of surgical neck of right humerus, subsequent encounter for fracture with routine healing
• S42.231G 3-part fracture of surgical neck of right humerus, subsequent encounter for fracture with delayed healing
• S42.231K 3-part fracture of surgical neck of right humerus, subsequent encounter for fracture with nonunion
• S42.231P 3-part fracture of surgical neck of right humerus, subsequent encounter for fracture with malunion
• S42.231S 3-part fracture of surgical neck of right humerus, sequela