2026 ICD-10-CM Diagnosis Code M89.8X5Other specified disorders of bone, thigh
ICD-10-CM Codes›M00–M99›M86-M90›M89
- Billable — Valid for Submission
- Not Chronic
M89.8X5 is a billable ICD-10-CM diagnosis code for other specified disorders of bone, thigh. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 564 through 566. Coders also document this condition as bilateral exostosis of femurs. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified bone disease and musculoskeletal deformities.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Bilateral exostosis of femurs
- Exostosis of femur
- Exostosis of left femur
- Exostosis of right femur
- Lesion of left thigh bone
- Lesion of right thigh bone
- Periostitis of femur
- Periostitis of pelvic region
- Periostitis without osteomyelitis
- Periostitis without osteomyelitis of pelvis and femur
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
- head, femur - M89.8X5
External Cause of Injuries IndexGuidance
References for this code in the External Cause of Injuries Index.
- Flattening
- head, femur
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Bone Diseases
Your bones help you move, give you shape and support your body. They are living tissues that rebuild constantly throughout your life. During childhood and your teens, your body adds new bone faster than it removes old bone. After about age 20, you can lose bone faster than you make bone.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert M89.8X5 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About M89.8X5Overview
Is M89.8X5 (Other specified disorders of bone) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report other specified disorders of bone, thigh on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does M89.8X5 group to?
When other specified disorders of bone, thigh is the principal diagnosis on an inpatient stay, it groups to MS-DRG 564, 565, 566, with relative weights from 0.7493 to 1.5436 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of M89.8X5?
Under the General Equivalence Mappings, other specified disorders of bone, thigh converts to ICD-9-CM 733.99 (bone & cartilage dis NEC). 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.
