M84.332K – Stress fracture, left ulna, subsequent encounter for fracture with nonunion

ICD-10-CM 2027 diagnosis code · Disorders of bone density and structure

Billable code

ICD-10-CM code M84.332K

Code: M84.332K (claims format: M84332K)
Description: Stress fracture, left ulna, subsequent encounter for fracture with nonunion
Short description: Stress fracture, left ulna, subs for fx w nonunion
Billable: Yes – valid for HIPAA-covered transactions
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 13. Diseases of the musculoskeletal system and connective tissue (M00-M99)
Block: M80-M85 Disorders of bone density and structure
Parent codes: M84 › M84.3 › M84.33 › M84.332

7th character values

Codes in this category need a 7th character to describe the encounter or episode of care.

Character	Meaning
`A`	initial encounter for 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

Notes inherited from parent codes

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

M84 – Disorder of continuity of bone

Excludes2 (not included here):

traumatic fracture of bone-see fracture, by site

M84.3 – Stress fracture

Applicable to:

Fatigue fracture
March fracture
Stress fracture NOS
Stress reaction

Excludes1 (not coded here):

pathological fracture NOS (M84.4.-)
pathological fracture due to osteoporosis (M80.-)
traumatic fracture (S12.-, S22.-, S32.-, S42.-, S52.-, S62.-, S72.-, S82.-, S92.-)

Excludes2 (not included here):

personal history of (healed) stress (fatigue) fracture (Z87.312)
stress fracture of vertebra (M48.4-)

Use additional code:

external cause code(s) to identify the cause of the stress fracture

7th character note:

The appropriate 7th character is to be added to each code from subcategory M84.3:

Related codes in M84.332

Frequently asked questions

What is ICD-10 code M84.332K?

M84.332K is the ICD-10-CM code for stress fracture, left ulna, subsequent encounter for fracture with nonunion, in the block M80-M85 (Disorders of bone density and structure).

Is M84.332K a billable code?

Yes. M84.332K is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does M84.332K belong to?

It belongs to category M84 – Disorder of continuity of bone.

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.