M87.09 ICD-10-CA code: Idiopathic aseptic necrosis of bone, unspecified site

M87.09 is the ICD-10-CA code for “Idiopathic aseptic necrosis of bone, unspecified site” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.

Official description

M87.09

Idiopathic aseptic necrosis of bone, unspecified site

Short description: Idiopath aseptic necrosis bone site NOS

ICD-10-CA · Canada · Also written M8709

Notes for M87.09

As CIHI prints them, with any note M87.09 takes from the headings above it.

Includes

Avascular necrosis of boneFrom M87 Osteonecrosis

Excludes

Conditions classified elsewhere.

Osteochondropathies (M91-M93)osteonecrosis of jaw (drug-induced) (radiation-induced) (K10.2)From M87 Osteonecrosis
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 M87.0 Idiopathic aseptic necrosis of bone
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 M87.09 sits

1ChapterChapter 13: Diseases of the musculoskeletal system and connective tissue (M00-M99)
2Block M80-M94Osteopathies and chondropathies
3Block M86-M90Other osteopathies
4Category M87Osteonecrosis
5Subcategory M87.0Idiopathic aseptic necrosis of bone
6Valid code M87.09Idiopathic aseptic necrosis of bone, unspecified site

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 M87.09 in the CIHI source

Frequently asked questions

What does ICD-10-CA code M87.09 mean?

M87.09 is the ICD-10-CA code for “Idiopathic aseptic necrosis of bone, unspecified site” in CIHI’s ICD-10-CA FY 2026–2027 release.

Where is M87.09 in ICD-10-CA?

M87.09 sits under M87.0 Idiopathic aseptic necrosis of bone, within M87 Osteonecrosis, 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 M87.09?

ICD-10-CA lists Note, Includes, Excludes notes for M87.09, 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.

View M87.0