Alphabetic Index FY2027

M86

Osteomyelitis

FY2027Chapter 13: Diseases of the musculoskeletal system and connective tissue/M86–M90 Other osteopathies

Non-billable headerNot valid on its own. Use one of the more specific codes under it.

M86 is a non-billable ICD-10-CM code category for osteomyelitis. Report a more specific code from it instead. It is part of the FY2027 code set, effective October 1, 2026. The more specific codes under it are M86.0 Acute hematogenous osteomyelitis, M86.1 Other acute osteomyelitis, M86.2 Subacute osteomyelitis, M86.3 Chronic multifocal osteomyelitis and 5 more. Its coding notes include a Use additional code instruction, 5 Excludes1 entries and 14 Excludes2 entries.

Use additional code

Add the listed code as a secondary code, if known.

This code
  • code (B95-B97) to identify infectious agent
  • code to identify major osseous defect, if applicable (M89.7-)

Excludes1

Not coded here. The listed conditions generally should not be reported together.

This code
Also from chapter/block level (1 note)
Inherited from M86–M90 Other osteopathies
  • postprocedural osteopathies (M96.-)

Excludes2

Not included here. Both codes may be reported if the patient has both conditions.

This code
Also from chapter/block level (10 notes)
Inherited from Chapter 13 Diseases of the musculoskeletal system and connective tissue
  • 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)

Notes

Also from chapter/block level (1 note)
Inherited from Chapter 13 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

More specific codes under M86 9