2023 ICD-10-CM Diagnosis Code M86

Osteomyelitis

    2016 2017 2018 2019 2020 2021 2022 2023 Non-Billable/Non-Specific Code
  • M86 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
  • The 2023 edition of ICD-10-CM M86 became effective on October 1, 2022.
  • This is the American ICD-10-CM version of M86 - other international versions of ICD-10 M86 may differ.
Use Additional
Use Additional Help
Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation. In most cases the manifestation codes will have in the code title, "in diseases classified elsewhere." Codes with this title are a component of the etiology/manifestation convention. The code title indicates that it is a manifestation code. "In diseases classified elsewhere" codes are never permitted to be used as first listed or principle diagnosis codes. They must be used in conjunction with an underlying condition code and they must be listed following the underlying condition.
  • code (B95-B97
    ICD-10-CM Range B95-B97

    Bacterial and viral infectious agents

    Note
    • These categories are provided for use as supplementary or additional codes to identify the infectious agent(s) in diseases classified elsewhere.
    • B95 Streptococcus, Staphylococcus, and Enter...
    • B96 Other bacterial agents as the cause of d...
    • B97 Viral agents as the cause of diseases cl...
    ) to identify infectious agent
Type 1 Excludes
Type 1 Excludes Help
A type 1 excludes note is a pure excludes. It means "not coded here". A type 1 excludes note indicates that the code excluded should never be used at the same time as M86. A type 1 excludes note is for used for when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • osteomyelitis due to:
  • echinococcus (
    ICD-10-CM Diagnosis Code B67.2

    Echinococcus granulosus infection of bone

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
    B67.2
    )
  • gonococcus (
    ICD-10-CM Diagnosis Code A54.43

    Gonococcal osteomyelitis

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
    Type 2 Excludes
    • gonococcal infection of spine (A54.41)
    A54.43
    )
  • salmonella (
    ICD-10-CM Diagnosis Code A02.24

    Salmonella osteomyelitis

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
    A02.24
    )
Type 2 Excludes
Type 2 Excludes Help
A type 2 excludes note represents "not included here". A type 2 excludes note indicates that the condition excluded is not part of the condition it is excluded from but a patient may have both conditions at the same time. When a type 2 excludes note appears under a code it is acceptable to use both the code (M86) and the excluded code together.
  • ostemyelitis of:
  • orbit (
    ICD-10-CM Diagnosis Code H05.0

    Acute inflammation of orbit

      2016 2017 2018 2019 2020 2021 2022 2023 Non-Billable/Non-Specific Code
    H05.0-
    )
  • petrous bone (
    ICD-10-CM Diagnosis Code H70.2

    Petrositis

      2016 2017 2018 2019 2020 2021 2022 2023 Non-Billable/Non-Specific Code
    Applicable To
    • Inflammation of petrous bone
    H70.2-
    )
  • vertebra (
    ICD-10-CM Diagnosis Code M46.2

    Osteomyelitis of vertebra

      2016 2017 2018 2019 2020 2021 2022 2023 Non-Billable/Non-Specific Code
    M46.2-
    )
The following code(s) above M86 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to M86:
  • M00-M99
    2023 ICD-10-CM Range M00-M99

    Diseases of the musculoskeletal system and connective tissue

    Note
    • Use an external cause code following the code for the musculoskeletal condition, if applicable, to identify the cause of the musculoskeletal condition
    Type 2 Excludes
    • arthropathic psoriasis (L40.5-)
    • certain conditions originating in the perinatal period (P04-P96)
    • certain infectious and parasitic diseases (A00-B99)
    • compartment syndrome (traumatic) (T79.A-)
    • complications of pregnancy, childbirth and the puerperium (O00-O9A)
    • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
    • endocrine, nutritional and metabolic diseases (E00-E88)
    • injury, poisoning and certain other consequences of external causes (S00-T88)
    • neoplasms (C00-D49)
    • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
    Diseases of the musculoskeletal system and connective tissue
  • M86-M90
    2023 ICD-10-CM Range M86-M90

    Other osteopathies

    Type 1 Excludes
    • postprocedural osteopathies (M96.-)
    Other osteopathies
Clinical Information
  • An acute or chronic inflammation of the bone and its structures due to infection with pyogenic bacteria.
  • Inflammation of the bone caused by an infection, which may spread to the bone marrow and tissues near the bone. Osteomyelitis can cause severe pain in the infected bone. If it is not treated, it can kill bone tissue.
  • Inflammation of the bone marrow and adjacent bone caused by a pyogenic organism; it may remain localized or may spread through the bone to involve the marrow, cortex, cancellous tissue, and periosteum.
Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
  • 2021 (effective 10/1/2020): No change
  • 2022 (effective 10/1/2021): No change
  • 2023 (effective 10/1/2022): No change
Code annotations containing back-references to M86:
  • Code First: M89.7
    ICD-10-CM Diagnosis Code M89.7

    Major osseous defect

      2016 2017 2018 2019 2020 2021 2022 2023 Non-Billable/Non-Specific Code
    Code First
    • underlying disease, if known, such as:
    • aseptic necrosis of bone (M87.-)
    • malignant neoplasm of bone (C40.-)
    • osteolysis (M89.5)
    • osteomyelitis (M86.-)
    • osteonecrosis (M87.-)
    • osteoporosis (M80.-, M81.-)
    • periprosthetic osteolysis (T84.05-)
ICD-10-CM Codes Adjacent To M86
M85.861 Other specified disorders of bone density and structure, right lower leg
M85.862 Other specified disorders of bone density and structure, left lower leg
M85.869 Other specified disorders of bone density and structure, unspecified lower leg
M85.87 Other specified disorders of bone density and structure, ankle and foot
M85.871 Other specified disorders of bone density and structure, right ankle and foot
M85.872 Other specified disorders of bone density and structure, left ankle and foot
M85.879 Other specified disorders of bone density and structure, unspecified ankle and foot
M85.88 …… other site
M85.89 …… multiple sites
M85.9 Disorder of bone density and structure, unspecified
M86 Osteomyelitis
M86.0 Acute hematogenous osteomyelitis
M86.00 …… unspecified site
M86.01 Acute hematogenous osteomyelitis, shoulder
M86.011 Acute hematogenous osteomyelitis, right shoulder
M86.012 Acute hematogenous osteomyelitis, left shoulder
M86.019 Acute hematogenous osteomyelitis, unspecified shoulder
M86.02 Acute hematogenous osteomyelitis, humerus
M86.021 Acute hematogenous osteomyelitis, right humerus
M86.022 Acute hematogenous osteomyelitis, left humerus
M86.029 Acute hematogenous osteomyelitis, unspecified humerus

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.