ICD-10 Code for Osteomyelitis

The default ICD-10-CM 2027 code for osteomyelitis (general) (infective) (localized) (neonatal) (purulent) (septic) (staphylococcal) (streptococcal) (suppurative) (with periostitis) is M86.9 – Osteomyelitis, unspecified. More specific codes depend on the details documented, as listed in the official index (90 codes, 39 billable).

Main code: M86.9 – Osteomyelitis, unspecified
Billable: Yes

Index entries for Osteomyelitis

acute – M86.10
- carpus – M86.14- (header)
- clavicle – M86.11- (header)
- femur – M86.15- (header)
- fibula – M86.16- (header)
- finger – M86.14- (header)
- hematogenous – M86.00
  - carpus – M86.04- (header)
  - clavicle – M86.01- (header)
  - femur – M86.05- (header)
  - fibula – M86.06- (header)
  - finger – M86.04- (header)
  - humerus – M86.02- (header)
  - ilium – M86.08
  - ischium – M86.08
  - mandible – M27.2
  - metacarpus – M86.04- (header)
  - metatarsus – M86.07- (header)
  - multiple sites – M86.09
  - neck – M86.08
  - orbit – H05.02- (header)
  - petrous bone – see Petrositis
  - radius – M86.03- (header)
  - rib – M86.08
  - scapula – M86.01- (header)
  - skull – M86.08
  - tarsus – M86.07- (header)
  - tibia – M86.06- (header)
  - toe – M86.07- (header)
  - ulna – M86.03- (header)
  - vertebra – see Osteomyelitis, vertebra
- humerus – M86.12- (header)
- ilium – M86.18
- ischium – M86.18
- mandible – M27.2
- metacarpus – M86.14- (header)
- metatarsus – M86.17- (header)
- multiple sites – M86.19
- neck – M86.18
- orbit – H05.02- (header)
- petrous bone – see Petrositis
- radius – M86.13- (header)
- rib – M86.18
- scapula – M86.11- (header)
- skull – M86.18
- tarsus – M86.17- (header)
- tibia – M86.16- (header)
- toe – M86.17- (header)
- ulna – M86.13- (header)
- vertebra – see Osteomyelitis, vertebra
chronic (or old) – M86.60
- with draining sinus – M86.40
  - carpus – M86.44- (header)
  - clavicle – M86.41- (header)
  - femur – M86.45- (header)
  - fibula – M86.46- (header)
  - finger – M86.44- (header)
  - humerus – M86.42- (header)
  - ilium – M86.48
  - ischium – M86.48
  - mandible – M27.2
  - metacarpus – M86.44- (header)
  - metatarsus – M86.47- (header)
  - multiple sites – M86.49
  - neck – M86.48
  - pubic ramus [pubis] – M86.48
  - orbit – H05.02- (header)
  - petrous bone – see Petrositis
  - radius – M86.43- (header)
  - rib – M86.48
  - scapula – M86.41- (header)
  - skull – M86.48
  - tarsus – M86.47- (header)
  - tibia – M86.46- (header)
  - toe – M86.47- (header)
  - ulna – M86.43- (header)
  - vertebra – see Osteomyelitis, vertebra
- carpus – M86.64- (header)
- clavicle – M86.61- (header)
- femur – M86.65- (header)
- fibula – M86.66- (header)
- finger – M86.64- (header)
- hematogenous NEC – M86.50
  - carpus – M86.54- (header)
  - clavicle – M86.51- (header)
  - femur – M86.55- (header)
  - fibula – M86.56- (header)
  - finger – M86.54- (header)
  - humerus – M86.52- (header)
  - ilium – M86.58
  - ischium – M86.58
  - mandible – M27.2
  - metacarpus – M86.54- (header)
  - metatarsus – M86.57- (header)
  - multifocal – M86.30
    - carpus – M86.34- (header)
    - clavicle – M86.31- (header)
    - femur – M86.35- (header)
    - fibula – M86.36- (header)
    - finger – M86.34- (header)
    - humerus – M86.32- (header)
    - ilium – M86.38
    - ischium – M86.38
    - metacarpus – M86.34- (header)
    - metatarsus – M86.37- (header)
    - multiple sites – M86.39
    - neck – M86.38
    - pubic ramus [pubis] – M86.38
    - radius – M86.33- (header)
    - rib – M86.38
    - scapula – M86.31- (header)
    - skull – M86.38
    - tarsus – M86.37- (header)
    - tibia – M86.36- (header)
    - toe – M86.37- (header)
    - ulna – M86.33- (header)
    - vertebra – see Osteomyelitis, vertebra
  - multiple sites – M86.59
  - neck – M86.58
  - orbit – H05.02- (header)
  - petrous bone – see Petrositis
  - pubic ramus [pubis] – M86.58
  - radius – M86.53- (header)
  - rib – M86.58
  - scapula – M86.51- (header)
  - skull – M86.58
  - tarsus – M86.57- (header)
  - tibia – M86.56- (header)
  - toe – M86.57- (header)
  - ulna – M86.53- (header)
  - vertebra – see Osteomyelitis, vertebra
- humerus – M86.62- (header)
- ilium – M86.659
- ischium – M86.659
- mandible – M27.2
- metacarpus – M86.64- (header)
- metatarsus – M86.67- (header)
- multifocal – see Osteomyelitis, chronic, hematogenous, multifocal
- multiple sites – M86.69
- neck – M86.68
- orbit – H05.02- (header)
- petrous bone – see Petrositis
- radius – M86.63- (header)
- rib – M86.68
- scapula – M86.61- (header)
- skull – M86.68
- tarsus – M86.67- (header)
- tibia – M86.66- (header)
- toe – M86.67- (header)
- ulna – M86.63- (header)
- vertebra – see Osteomyelitis, vertebra
echinococcal – B67.2
Garr's – see Osteomyelitis, specified type NEC
in diabetes mellitus – see E08-E13 with .69
jaw (acute) (chronic) (lower) (neonatal) (suppurative) (upper) – M27.2
nonsuppurating – see Osteomyelitis, specified type NEC
orbit – H05.02- (header)
petrous bone – see Petrositis
Salmonella (arizonae) (cholerae-suis) (enteritidis) (typhimurium) – A02.24
sclerosing, nonsuppurative – see Osteomyelitis, specified type NEC
specified type NEC – M86.8X- (header) – see also subcategory
- mandible – M27.2
- orbit – H05.02- (header)
- petrous bone – see Petrositis
- vertebra – see Osteomyelitis, vertebra
subacute – M86.20
- carpus – M86.24- (header)
- clavicle – M86.21- (header)
- femur – M86.25- (header)
- fibula – M86.26- (header)
- finger – M86.24- (header)
- humerus – M86.22- (header)
- mandible – M27.2
- metacarpus – M86.24- (header)
- metatarsus – M86.27- (header)
- multiple sites – M86.29
- neck – M86.28
- orbit – H05.02- (header)
- petrous bone – see Petrositis
- radius – M86.23- (header)
- rib – M86.28
- scapula – M86.21- (header)
- skull – M86.28
- tarsus – M86.27- (header)
- tibia – M86.26- (header)
- toe – M86.27- (header)
- ulna – M86.23- (header)
- vertebra – see Osteomyelitis, vertebra
syphilitic – A52.77
- congenital (early) – A50.02 – M90.80 [manifestation]
tuberculous – see Tuberculosis, bone
typhoid – A01.05
vertebra – M46.20
- cervical region – M46.22
- cervicothoracic region – M46.23
- lumbar region – M46.26
- lumbosacral region – M46.27
- occipito-atlanto-axial region – M46.21
- sacrococcygeal region – M46.28
- thoracic region – M46.24
- thoracolumbar region – M46.25

How to choose the right code

Start with the main term, then pick the indented subterm that matches the documentation (type, cause, site, laterality, episode of care). Always confirm the code in the tabular list: follow its Excludes1/Excludes2, “code first” and “use additional code” notes, and add a 7th character where required.

Source: CDC/NCHS ICD-10-CM FY2027 alphabetic index.