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M86.86 ICD-10-CA code: Other osteomyelitis, lower leg

M86.86 is the ICD-10-CA code for “Other osteomyelitis, lower leg” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.

Official description

M86.86

Other osteomyelitis, lower leg

Short description: Other osteomyelitis lower leg

ICD-10-CA · Canada · Also written M8686

Notes for M86.86

As CIHI prints them, with any note M86.86 takes from the headings above it.

Includes

Use additional code

Add a code for this detail when the note documents it.

Excludes

Conditions classified elsewhere.

  • Osteomyelitis (of):• due to salmonella (A02† M90.2*)• jaw (K10.2)• vertebra (M46.2)From M86 Osteomyelitis
  • Postprocedural osteopathies (M96.-)From M86-M90 Other osteopathies
  • Certain:• conditions originating in the perinatal period (P00-P96)• disorders of the temporomandibular joint (K07.6)• infectious and parasitic diseases (A00-B99)compartment syndrome (T79.6)complications of pregnancy, childbirth and the puerperium (O00-O99)congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)endocrine, nutritional and metabolic diseases (E00-E90)injury, poisoning and certain other consequences of external causes (S00-T98)neoplasms (C00-D48)symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)From Chapter 13: Diseases of the musculoskeletal system and connective tissue (M00-M99)

Note

  • [To review the anatomical site captured in the 5th character subclassification see Chapter XIII]From M86.8 Other osteomyelitis
  • The following fifth characters represent the following sites of involvement:0 Multiple sites1 Shoulder region: clavical , scapula — joint acromioclavicular, glenohumeral, sternoclavicular2 Upper arm: humerus — elbow joint,3 Forearm: radius , ulna — wrist joint,4 Hand: carpus, fingers, metacarpus — joints between these bones,5 Pelvic region and thigh: buttock , femur , pelvis — joint hip , sacroiliac6 Lower leg: fibula , tibia — knee joint7 Ankle and foot: metatarsus, tarsus, toes — other joints in foot8 Other:head neck ribs skull trunk vertebral column9 Site unspecifiedFrom Chapter 13: Diseases of the musculoskeletal system and connective tissue (M00-M99)

Where M86.86 sits

  1. 1ChapterChapter 13: Diseases of the musculoskeletal system and connective tissue (M00-M99)
  2. 2Block M80-M94Osteopathies and chondropathies
  3. 3Block M86-M90Other osteopathies
  4. 4Category M86Osteomyelitis
  5. 5Subcategory M86.8Other osteomyelitis
  6. 6Valid code M86.86Other osteomyelitis, lower leg

Source and release

Data release
ICD-10-CA · FY 2026–2027
Effective date
Apr 1, 2026
Publisher
CIHI

This page is built from the ICD-10-CA catalog that Vero Codes reads when it suggests codes: Canadian Institute for Health Information’s FY 2026–2027 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.

See M86.86 in the CIHI source

Frequently asked questions

What does ICD-10-CA code M86.86 mean?

M86.86 is the ICD-10-CA code for “Other osteomyelitis, lower leg” in CIHI’s ICD-10-CA FY 2026–2027 release.

Where is M86.86 in ICD-10-CA?

M86.86 sits under M86.8 Other osteomyelitis, within M86 Osteomyelitis, within M86-M90 Other osteopathies, within M80-M94 Osteopathies and chondropathies, within Chapter 13: Diseases of the musculoskeletal system and connective tissue (M00-M99).

What coding notes apply to M86.86?

ICD-10-CA lists Note, Includes, Use additional code, Excludes notes for M86.86, including those from the headings it sits under. They are listed on this page with where each one comes from.

Which ICD-10-CA release does this page use?

It uses CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026 to Mar 31, 2027. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.

Codes beside M86.86

M86.80Other osteomyelitis, multiple sitesM86.81Other osteomyelitis, shoulder regionM86.82Other osteomyelitis, upper armM86.83Other osteomyelitis, forearmM86.84Other osteomyelitis, handM86.85Other osteomyelitis, pelvic region and thighM86.87Other osteomyelitis, ankle and footM86.88Other osteomyelitis, other siteM86.89Other osteomyelitis, unspecified site