2026 ICD-10-CM Diagnosis Code M84.453SPathological fracture, unspecified femur, sequela
M84.453S is a billable ICD-10-CM diagnosis code for pathological fracture, unspecified femur, sequela. The 7th character S marks it as a sequela code, which reports a problem that remains after the original condition has resolved. 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 osteoporotic fracture of femur. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Pathological, stress and atypical fractures, sequela.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Osteoporotic fracture of femur
- Osteoporotic fracture of neck of femur
- Osteoporotic fracture of proximal femur
- Pathological fracture of femur
- Pathological fracture of neck of femur
- Pathological fracture of pelvis
- Pathological fracture of pelvis and femur
- Pathological fracture of proximal end of femur
- Stress fracture of neck of femur
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 M84.453S to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About M84.453SOverview
Is M84.453S (Pathological fracture, unspecified femur) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report pathological fracture, unspecified femur, sequela on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What does the 7th character S in M84.453S mean?
The final character S makes this a sequela code: it reports a lingering problem that remains after the pathological fracture, unspecified femur itself has resolved, not the original event.
What MS-DRG does M84.453S group to?
When pathological fracture, unspecified femur, sequela 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 M84.453S?
Under the General Equivalence Mappings, pathological fracture, unspecified femur, sequela converts to ICD-9-CM 905.4 (late effect leg fx). 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.
