M86.8X5 Other osteomyelitis, thigh

ICD-10-CM Diagnosis Code M86.8X5: Other osteomyelitis, thigh

ICD-10-CM code M86.8X5 identifies other osteomyelitis, thigh. The terminology record is active and classifies the concept as a disease or syndrome. The code has a parent concept of other osteomyelitis and maps to risk adjustment categories for bone and muscle infections under CMS models. 1 3

Plain-language overview

The ICD-10-CM code M86.8X5 carries the preferred name other osteomyelitis, thigh, and the terminology record assigns it a semantic type of disease or syndrome. 1

What this code represents

Code M86.8X5 represents a diagnosis of other osteomyelitis located in the thigh, and the terminology record lists its parent concept as M86.8X, other osteomyelitis. 1

Coding details

The ICD-10-CM code M86.8X5 is an active terminology record that has narrower concepts within the system, and it does not list inclusion or exclusion notes for the current period. 1 3

For the current effective period, the code M86.8X5 does not list Code First sequencing instructions, Use Additional Code instructions, or Code Also instructions. 3

Documentation considerations

The ICD-10-CM code M86.8X5 does not list inclusion terms, Excludes 1 notes, or Excludes 2 notes for the current effective period, providing no additional terminology instructions for this specific diagnosis. 3

Coverage and utilization context

Under the CMS-HCC V28 risk adjustment model, M86.8X5 maps to bone, joint, muscle, severe soft tissue infections, or necrosis, with a community non-dual aged RAF of 0.479. 3

What the sources add

While one official source defines M86.8X5 as other osteomyelitis, thigh for ICD-10-CM 2026, another source maps the identical code to the SNOMEDCT_US concept 1144503007. 1 2

A risk adjustment source identifies M86.8X5 as mapping to bone, joint, muscle infections, or necrosis under the CMS-HCC V24 model, adding operational context to the official terminology. 3

Questions to verify

The supplied sources do not establish the specific clinical symptoms, underlying causes, or treatment protocols associated with other osteomyelitis of the thigh. 1 3

Sources

1. ICD-10-CM M86.8X5 terminology record — National Cancer Institute Enterprise Vocabulary Services; accessed 2026-07-27.
2. EVS Explore — evsexplore.semantics.cancer.gov; accessed 2026-07-27.
3. 2026 ICD-10-CM M86.8X5: Other osteomyelitis, thigh | HCC 92 — hccbuddy.com; accessed 2026-07-27.
4. Medical Billing Code Search — app.drchrono.com; accessed 2026-07-27.
5. M86.8X5 - Other osteomyelitis, thigh | ICD-10-CM — unboundmedicine.com; accessed 2026-07-27.