2026 ICD-10-CM Diagnosis Code M86Osteomyelitis
M86 is a non-billable ICD-10-CM category code for osteomyelitis, so it cannot be submitted on claims. Use a more specific code from this category instead, such as M86.00, M86.011, M86.012, and M86.019.
Code Identity
Code Classification
Specific Coding for OsteomyelitisOverview
Non-specific codes like M86 require more characters. Use one of these billable codes instead:
M86.0 for Acute hematogenous osteomyelitis
Use M86.00 for Acute hematogenous osteomyelitis, unspecified site
M86.01 for Acute hematogenous osteomyelitis, shoulder
M86.02 for Acute hematogenous osteomyelitis, humerus
M86.03 for Acute hematogenous osteomyelitis, radius and ulna
M86.04 for Acute hematogenous osteomyelitis, hand
M86.05 for Acute hematogenous osteomyelitis, femur
M86.06 for Acute hematogenous osteomyelitis, tibia and fibula
M86.07 for Acute hematogenous osteomyelitis, ankle and foot
Use M86.08 for Acute hematogenous osteomyelitis, other sites
Use M86.09 for Acute hematogenous osteomyelitis, multiple sites
M86.1 for Other acute osteomyelitis
Use M86.10 for Other acute osteomyelitis, unspecified site
M86.11 for Other acute osteomyelitis, shoulder
M86.12 for Other acute osteomyelitis, humerus
M86.13 for Other acute osteomyelitis, radius and ulna
M86.14 for Other acute osteomyelitis, hand
M86.15 for Other acute osteomyelitis, femur
M86.16 for Other acute osteomyelitis, tibia and fibula
M86.17 for Other acute osteomyelitis, ankle and foot
Use M86.18 for Other acute osteomyelitis, other site
Use M86.19 for Other acute osteomyelitis, multiple sites
M86.2 for Subacute osteomyelitis
Use M86.20 for Subacute osteomyelitis, unspecified site
M86.21 for Subacute osteomyelitis, shoulder
M86.22 for Subacute osteomyelitis, humerus
M86.23 for Subacute osteomyelitis, radius and ulna
M86.24 for Subacute osteomyelitis, hand
M86.25 for Subacute osteomyelitis, femur
M86.26 for Subacute osteomyelitis, tibia and fibula
M86.27 for Subacute osteomyelitis, ankle and foot
Use M86.28 for Subacute osteomyelitis, other site
Use M86.29 for Subacute osteomyelitis, multiple sites
M86.3 for Chronic multifocal osteomyelitis
Use M86.30 for Chronic multifocal osteomyelitis, unspecified site
M86.31 for Chronic multifocal osteomyelitis, shoulder
M86.32 for Chronic multifocal osteomyelitis, humerus
M86.33 for Chronic multifocal osteomyelitis, radius and ulna
M86.34 for Chronic multifocal osteomyelitis, hand
M86.35 for Chronic multifocal osteomyelitis, femur
M86.36 for Chronic multifocal osteomyelitis, tibia and fibula
M86.37 for Chronic multifocal osteomyelitis, ankle and foot
Use M86.38 for Chronic multifocal osteomyelitis, other site
Use M86.39 for Chronic multifocal osteomyelitis, multiple sites
M86.4 for Chronic osteomyelitis with draining sinus
Use M86.40 for Chronic osteomyelitis with draining sinus, unspecified site
M86.41 for Chronic osteomyelitis with draining sinus, shoulder
M86.42 for Chronic osteomyelitis with draining sinus, humerus
M86.43 for Chronic osteomyelitis with draining sinus, radius and ulna
M86.44 for Chronic osteomyelitis with draining sinus, hand
M86.45 for Chronic osteomyelitis with draining sinus, femur
M86.46 for Chronic osteomyelitis with draining sinus, tibia and fibula
M86.47 for Chronic osteomyelitis with draining sinus, ankle and foot
Use M86.48 for Chronic osteomyelitis with draining sinus, other site
Use M86.49 for Chronic osteomyelitis with draining sinus, multiple sites
M86.5 for Other chronic hematogenous osteomyelitis
Use M86.50 for Other chronic hematogenous osteomyelitis, unspecified site
M86.51 for Other chronic hematogenous osteomyelitis, shoulder
M86.52 for Other chronic hematogenous osteomyelitis, humerus
M86.53 for Other chronic hematogenous osteomyelitis, radius and ulna
M86.54 for Other chronic hematogenous osteomyelitis, hand
M86.55 for Other chronic hematogenous osteomyelitis, femur
M86.56 for Other chronic hematogenous osteomyelitis, tibia and fibula
M86.57 for Other chronic hematogenous osteomyelitis, ankle and foot
Use M86.58 for Other chronic hematogenous osteomyelitis, other site
Use M86.59 for Other chronic hematogenous osteomyelitis, multiple sites
M86.6 for Other chronic osteomyelitis
Use M86.60 for Other chronic osteomyelitis, unspecified site
M86.61 for Other chronic osteomyelitis, shoulder
M86.62 for Other chronic osteomyelitis, humerus
M86.63 for Other chronic osteomyelitis, radius and ulna
M86.64 for Other chronic osteomyelitis, hand
M86.65 for Other chronic osteomyelitis, thigh
M86.66 for Other chronic osteomyelitis, tibia and fibula
M86.67 for Other chronic osteomyelitis, ankle and foot
Use M86.68 for Other chronic osteomyelitis, other site
Use M86.69 for Other chronic osteomyelitis, multiple sites
M86.8 for Other osteomyelitis
M86.8X for Other osteomyelitis
Use M86.9 for Osteomyelitis, unspecified
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Use Additional Code
Type 1 Excludes
Type 2 Excludes
The “use additional code” indicates that a secondary code could be used to further specify the patient’s condition. This note is not mandatory and is only used if enough information is available to assign an additional code.
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
Clinical InformationClinical
Osteomyelitis
inflammation of the bone as a result of infection. it may be caused by a variety of infectious agents, especially pyogenic (pus - producing) bacteria.
Patient EducationClinical
Bone Infections
Like other parts of the body, bones can get infected. The infections are usually bacterial, but can also be fungal. They may spread to the bone from nearby skin or muscles, or from another part of the body through the bloodstream.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
