2026 ICD-10-CM Diagnosis Code M84.451GPathological fracture, right femur, subsequent encounter for fracture with delayed healing
M84.451G is a billable ICD-10-CM diagnosis code for pathological fracture, right femur, subsequent encounter for fracture with delayed healing. The 7th character G reports a subsequent encounter for a fracture that is healing more slowly than expected. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 559 through 561. Coders also document this condition as fracture of midcervical section of neck of right femur. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Pathological fracture, subsequent encounter.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Fracture of midcervical section of neck of right femur
- Fracture of neck of right femur
- Midcervical fracture of neck of femur
- Pathological fracture of neck of femur
- Pathological fracture of neck of right femur
- Pathological fracture of proximal end of femur
- Pathological fracture of right femur
- Pathological fracture of right hip
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Fractures
A fracture is a break in a bone. Fractures are usually caused by injuries. Since they can sometimes be serious, it's important to get medical care right away if you think you have a fracture.
The full article covers:
- What is a fracture?
- What are the different types of fractures?
- What causes fractures?
- What are the symptoms of a fracture?
- How are fractures diagnosed?
- What are the treatments for fractures?
- Can fractures be prevented?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert M84.451G to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About M84.451GOverview
Is M84.451G (Pathological fracture, right femur) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report pathological fracture, right femur, subsequent encounter for fracture with delayed healing on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What does the 7th character G in M84.451G mean?
The final character G reports a subsequent encounter where the pathological fracture, right femur is healing more slowly than expected.
What MS-DRG does M84.451G group to?
When pathological fracture, right femur, subsequent encounter for fracture with delayed healing is the principal diagnosis on an inpatient stay, it groups to MS-DRG 559, 560, 561, with relative weights from 0.8039 to 1.8649 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of M84.451G?
Under the General Equivalence Mappings, pathological fracture, right femur, subsequent encounter for fracture with delayed healing converts to ICD-9-CM V54.25 (aftrcare path fx up leg). The mapping is approximate, so confirm the match fits the documentation.
Footnotes
[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.
