S82.40 – Unspecified fracture of shaft of fibula

ICD-10-CM 2027 diagnosis code · Injuries to the knee and lower leg

Non-billable header

ICD-10-CM code S82.40

Code: S82.40 (claims format: S8240)
Description: Unspecified fracture of shaft of fibula
Billable: No – use a more specific code below
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 19. Injury, poisoning and certain other consequences of external causes (S00-T88)
Block: S80-S89 Injuries to the knee and lower leg
Parent codes: S82 › S82.4

Billable codes under S82.40

S82.40 is a header code and cannot be used on claims. Choose the most specific code:

S82.401 – Unspecified fracture of shaft of right fibulaHeader (more codes below)
S82.402 – Unspecified fracture of shaft of left fibulaHeader (more codes below)
S82.409 – Unspecified fracture of shaft of unspecified fibulaHeader (more codes below)

7th character values

Codes in this category need a 7th character to describe the encounter or episode of care (use placeholder X for empty positions).

Character	Meaning
`A`	initial encounter for closed fracture
`B`	initial encounter for open fracture type I or II
`C`	initial encounter for open fracture type IIIA, IIIB, or IIIC
`D`	subsequent encounter for closed fracture with routine healing
`E`	subsequent encounter for open fracture type I or II with routine healing
`F`	subsequent encounter for open fracture type IIIA, IIIB, or IIIC with routine healing
`G`	subsequent encounter for closed fracture with delayed healing
`H`	subsequent encounter for open fracture type I or II with delayed healing
`J`	subsequent encounter for open fracture type IIIA, IIIB, or IIIC with delayed healing
`K`	subsequent encounter for closed fracture with nonunion
`M`	subsequent encounter for open fracture type I or II with nonunion
`N`	subsequent encounter for open fracture type IIIA, IIIB, or IIIC with nonunion
`P`	subsequent encounter for closed fracture with malunion
`Q`	subsequent encounter for open fracture type I or II with malunion
`R`	subsequent encounter for open fracture type IIIA, IIIB, or IIIC with malunion
`S`	sequela

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

S82 – Fracture of lower leg, including ankle

Includes:

fracture of malleolus

Excludes1 (not coded here):

traumatic amputation of lower leg (S88.-)

Excludes2 (not included here):

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-)

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
The open fracture designations are based on the Gustilo open fracture classification

7th character note:

The appropriate 7th character is to be added to all codes from category S82

S82.4 – Fracture of shaft of fibula

Excludes2 (not included here):

fracture of lateral malleolus alone (S82.6-)

Block S80-S89

Excludes2 (not included here):

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)

Index terms for S82.40

Entries in the ICD-10-CM alphabetic index that lead to this code:

Fracture, traumatic, fibula

Related codes in S82.4

Frequently asked questions

What is ICD-10 code S82.40?

S82.40 is the ICD-10-CM code for unspecified fracture of shaft of fibula, in the block S80-S89 (Injuries to the knee and lower leg).

Is S82.40 a billable code?

No. S82.40 is a header code with more specific child codes; report one of the billable codes listed above.

What category does S82.40 belong to?

It belongs to category S82 – Fracture of lower leg, including ankle.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.