M84.439D – Pathological fracture, unspecified ulna and radius, subsequent encounter for fracture with routine healing

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

Billable code

ICD-10-CM code M84.439D

Code: M84.439D (claims format: M84439D)
Description: Pathological fracture, unspecified ulna and radius, subsequent encounter for fracture with routine healing
Short description: Path fx, unsp ulna and radius, subs for fx w routn heal
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 › M84.4 › M84.43 › M84.439

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

M84.4 – Pathological fracture, not elsewhere classified

Applicable to:

Chronic fracture
Pathological fracture NOS

Excludes1 (not coded here):

collapsed vertebra NEC (M48.5)
pathological fracture in neoplastic disease (M84.5-)
pathological fracture in osteoporosis (M80.-)
pathological fracture in other disease (M84.6-)
stress fracture (M84.3-)
traumatic fracture (S12.-, S22.-, S32.-, S42.-, S52.-, S62.-, S72.-, S82.-, S92.-)

Excludes2 (not included here):

personal history of (healed) pathological fracture (Z87.311)

7th character note:

The appropriate 7th character is to be added to each code from subcategory M84.4:

Related codes in M84.439

Frequently asked questions

What is ICD-10 code M84.439D?

M84.439D is the ICD-10-CM code for pathological fracture, unspecified ulna and radius, subsequent encounter for fracture with routine healing, in the block M80-M85 (Disorders of bone density and structure).

Is M84.439D a billable code?

Yes. M84.439D is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does M84.439D 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.