2021 ICD-10-CM Diagnosis Code M86.21

Subacute osteomyelitis, shoulder

    2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
  • M86.21 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
  • The 2021 edition of ICD-10-CM M86.21 became effective on October 1, 2020.
  • This is the American ICD-10-CM version of M86.21 - other international versions of ICD-10 M86.21 may differ.
The following code(s) above M86.21 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 M86.21:
  • M00-M99
    2021 ICD-10-CM Range M00-M99

    Diseases of the musculoskeletal system and connective tissue

    • 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
    2021 ICD-10-CM Range M86-M90

    Other osteopathies

    Type 1 Excludes
    • postprocedural osteopathies (M96.-)
    Other osteopathies
  • M86
    ICD-10-CM Diagnosis Code M86


      2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
    Type 1 Excludes
    Type 2 Excludes
    Use Additional
    • code (B95-B97) to identify infectious agent
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

Diagnosis Index entries containing back-references to M86.21:
  • Osteomyelitis (general) (infective) (localized) (neonatal) (purulent) (septic) (staphylococcal) (streptococcal) (suppurative) (with periostitis) M86.9
    ICD-10-CM Diagnosis Code M86.9

    Osteomyelitis, unspecified

      2016 2017 2018 2019 2020 2021 Billable/Specific Code
    Applicable To
    • Infection of bone NOS
    • Periostitis without osteomyelitis
    • subacute M86.20
      ICD-10-CM Diagnosis Code M86.20

      Subacute osteomyelitis, unspecified site

        2016 2017 2018 2019 2020 2021 Billable/Specific Code
      • clavicle M86.21-
      • scapula M86.21-

ICD-10-CM Codes Adjacent To M86.21
M86.162 Other acute osteomyelitis, left tibia and fibula
M86.169 Other acute osteomyelitis, unspecified tibia and fibula
M86.17 Other acute osteomyelitis, ankle and foot
M86.171 Other acute osteomyelitis, right ankle and foot
M86.172 Other acute osteomyelitis, left ankle and foot
M86.179 Other acute osteomyelitis, unspecified ankle and foot
M86.18 …… other site
M86.19 …… multiple sites
M86.2 Subacute osteomyelitis
M86.20 …… unspecified site
M86.21 Subacute osteomyelitis, shoulder
M86.211 Subacute osteomyelitis, right shoulder
M86.212 Subacute osteomyelitis, left shoulder
M86.219 Subacute osteomyelitis, unspecified shoulder
M86.22 Subacute osteomyelitis, humerus
M86.221 Subacute osteomyelitis, right humerus
M86.222 Subacute osteomyelitis, left humerus
M86.229 Subacute osteomyelitis, unspecified humerus
M86.23 Subacute osteomyelitis, radius and ulna
M86.231 Subacute osteomyelitis, right radius and ulna
M86.232 Subacute osteomyelitis, left radius and ulna

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