2026 ICD-10-CM Diagnosis Code M80.059PAge-related osteoporosis with current pathological fracture, unspecified femur, subsequent encounter for fracture with malunion

ICD-10-CM Codes›M00–M99›M80-M85›M80

ICD-10-CM M80.059P
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

M80.059P is a billable ICD-10-CM diagnosis code for age-related osteoporosis with current pathological fracture, unspecified femur, subsequent encounter for fracture with malunion. The 7th character P reports a subsequent encounter for a fracture that has healed in a faulty position, called a malunion. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 521 through 522, 564 through 566. The code is restricted by the Medicare Code Editor to adult patients (age 15 through 124), flagged as an unspecified code, since codes identifying laterality exist in the same family, and exempt from POA reporting. Coders also document this condition as osteoporotic fracture of femur. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Pathological fracture, subsequent encounter.

Code Identity

ICD-10-CM Code
M80.059P
Billable Status
Yes — Valid for Submission
Code Describes
Age-related osteoporosis with current pathological fracture, unspecified femur, subsequent encounter for fracture with malunion
Short Description
Age-rel osteopor w crnt path fx, unsp femr, 7thP
Parent Code
M80.059
Age-related osteoporosis with current pathological fracture, unspecified femur

Code Classification

ChapterM00–M99Diseases of the musculoskeletal system and connective tissue
SectionM80-M85Disorders of bone density and structure
CategoryM80Osteoporosis with current pathological fracture
This CodeM80.059PAge-related osteoporosis with current pathological fracture, unspecified femur, subsequent encounter for fracture with malunion

Code EditsBilling

Medicare Code Editor checks that affect claim validity for M80.059P.

Adult diagnoses
The Medicare Code Editor detects inconsistencies in adult cases by checking a patient's age and any diagnosis on the patient's record. The adult code edits apply to patients age range is 15–124 years inclusive (e.g., senile delirium, mature cataract).
Unspecified codes
Unspecified codes exist in the ICD-10-CM classification for circumstances when documentation in the medical record does not provide the level of detail needed to support reporting a more specific code. However, in the inpatient setting, there should generally be very limited and rare circumstances for which the laterality (right, left, bilateral) of a condition is unable to be documented and reported. The following pages contain the list of unspecified ICD-10-CM diagnosis codes for which there is a more specific code to identify laterality (right, left, bilateral) within that code family.

Present on Admission (POA)Billing

M80.059P is exempt from POA reporting on inpatient claims to general acute care hospitals. Review other POA exempt codes.

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
  • Stress fracture of neck of femur

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR MUS015
Pathological fracture, subsequent encounter
Default principal diagnosis: inpatient Yes · outpatient Yes

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 M80.059P to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
733.81 Malunion of fracture
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About M80.059POverview

Is M80.059P a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report age-related osteoporosis with current pathological fracture, unspecified femur, subsequent encounter for fracture with malunion on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What does the 7th character P in M80.059P mean?

The final character P reports a subsequent encounter where the age-related osteoporosis with current pathological fracture, unspecified femur has healed in a faulty position, called a malunion.

What MS-DRG does M80.059P group to?

When age-related osteoporosis with current pathological fracture, unspecified femur, subsequent encounter for fracture with malunion is the principal diagnosis on an inpatient stay, it groups to MS-DRG 521, 522, 564, 565, 566, with relative weights from 0.7493 to 2.8702 depending on complications. Higher weights mean higher Medicare reimbursement.

Who can M80.059P be reported for?

The Medicare Code Editor checks age-related osteoporosis with current pathological fracture, unspecified femur, subsequent encounter for fracture with malunion against patient demographics: this code is intended for adult patients (age 15 through 124). Claims outside these limits are flagged as inconsistent.

Is M80.059P exempt from POA reporting?

Yes. CMS lists this code among those exempt from present on admission reporting, so hospitals do not assign a POA indicator for age-related osteoporosis with current pathological fracture, unspecified femur, subsequent encounter for fracture with malunion on inpatient claims.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.