FY2027 ICD-10-CM reference
M86.6: Other chronic osteomyelitis
By the HCC Buddy Coding Team
The official ICD-10-CM descriptor is Other chronic osteomyelitis. The FY2027 annual edition starts October 1, 2026. Check the edition that applies to the encounter or inpatient discharge, including any April update.
Nonbillable heading. Verified against the official FY2027 order file.
More specific FY2027 codes
- M86.60: Other chronic osteomyelitis, unspecified siteBillable code
- M86.61: Other chronic osteomyelitis, shoulderNonbillable heading
- M86.62: Other chronic osteomyelitis, humerusNonbillable heading
- M86.63: Other chronic osteomyelitis, radius and ulnaNonbillable heading
- M86.64: Other chronic osteomyelitis, handNonbillable heading
- M86.65: Other chronic osteomyelitis, thighNonbillable heading
- M86.66: Other chronic osteomyelitis, tibia and fibulaNonbillable heading
- M86.67: Other chronic osteomyelitis, ankle and footNonbillable heading
- M86.68: Other chronic osteomyelitis, other siteBillable code
- M86.69: Other chronic osteomyelitis, multiple sitesBillable code
FY2027 Tabular instructions
Instructions below include applicable chapter, section and parent-code notes. Each note identifies where it appears in the official source.
Instructional note
Use an external cause code following the code for the musculoskeletal condition, if applicable, to identify the cause of the musculoskeletal condition
Source: M00-M99 (chapter, inherited).
Excludes2
arthropathic psoriasis (L40.5-)
Source: M00-M99 (chapter, inherited).
Excludes2
certain conditions originating in the perinatal period (P04-P96)
Source: M00-M99 (chapter, inherited).
Excludes2
certain infectious and parasitic diseases (A00-B99)
Source: M00-M99 (chapter, inherited).
Excludes2
compartment syndrome (traumatic) (T79.A-)
Source: M00-M99 (chapter, inherited).
Excludes2
complications of pregnancy, childbirth and the puerperium (O00-O9A)
Source: M00-M99 (chapter, inherited).
Excludes2
congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
Source: M00-M99 (chapter, inherited).
Excludes2
endocrine, nutritional and metabolic diseases (E00-E88)
Source: M00-M99 (chapter, inherited).
Excludes2
injury, poisoning and certain other consequences of external causes (S00-T88)
Source: M00-M99 (chapter, inherited).
Excludes2
neoplasms (C00-D49)
Source: M00-M99 (chapter, inherited).
Excludes2
symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Source: M00-M99 (chapter, inherited).
Excludes1
postprocedural osteopathies (M96.-)
Source: M86-M90 (section, inherited).
Instructional note
code (B95-B97) to identify infectious agent
Source: M86 (category, inherited).
Instructional note
code to identify major osseous defect, if applicable (M89.7-)
Source: M86 (category, inherited).
Excludes1
osteomyelitis due to:
Source: M86 (category, inherited).
Excludes1
echinococcus (B67.2)
Source: M86 (category, inherited).
Excludes1
gonococcus (A54.43)
Source: M86 (category, inherited).
Excludes1
salmonella (A02.24)
Source: M86 (category, inherited).
Excludes2
ostemyelitis of:
Source: M86 (category, inherited).
Excludes2
orbit (H05.0-)
Source: M86 (category, inherited).
Excludes2
petrous bone (H70.2-)
Source: M86 (category, inherited).
Excludes2
vertebra (M46.2-)
Source: M86 (category, inherited).
Compare the FY2027 additions, removals and billable-status changes
What does M86.6 mean in FY2027?
The official ICD-10-CM descriptor is Other chronic osteomyelitis. The FY2027 annual edition starts October 1, 2026. Check the edition that applies to the encounter or inpatient discharge, including any April update.
Is M86.6 billable in FY2027?
The FY2027 order file marks M86.6 as a nonbillable heading. Select a complete billable child code.
Does M86.6 map to an HCC?
Risk-model mapping is not applicable to this nonbillable heading. Check a complete billable child code.
Source: CMS FY2027 ICD-10-CM order file. Read the FY2027 Official Guidelines.
Review the FY2026 April edition