M84.42 ICD-10-CA code: Pathological fracture, not elsewhere classified, upper arm
M84.42 is the ICD-10-CA code for “Pathological fracture, not elsewhere classified, upper arm” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.
Official description
M84.42Pathological fracture, not elsewhere classified, upper arm
Short description: Pathological fracture NEC upper arm
ICD-10-CA · Canada · Also written M8442
Notes for M84.42
As CIHI prints them, with any note M84.42 takes from the headings above it.
Includes
- Pathological fracture, NOSFrom M84.4 Pathological fracture, not elsewhere classified
Excludes
Conditions classified elsewhere.
- Collapsed vertebra NEC (M48.5)pathological fracture in osteoporosis (M80-)From M84.4 Pathological fracture, not elsewhere classified
- 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 M84.4 Pathological fracture, not elsewhere classified
- 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 M84.42 sits
- 1ChapterChapter 13: Diseases of the musculoskeletal system and connective tissue (M00-M99)
- 2Block M80-M94Osteopathies and chondropathies
- 3Block M80-M85Disorders of bone density and structure
- 4Category M84Disorders of continuity of bone
- 5Subcategory M84.4Pathological fracture, not elsewhere classified
- 6Valid code M84.42Pathological fracture, not elsewhere classified, upper arm
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.
Frequently asked questions
What does ICD-10-CA code M84.42 mean?
M84.42 is the ICD-10-CA code for “Pathological fracture, not elsewhere classified, upper arm” in CIHI’s ICD-10-CA FY 2026–2027 release.
Where is M84.42 in ICD-10-CA?
M84.42 sits under M84.4 Pathological fracture, not elsewhere classified, within M84 Disorders of continuity of bone, within M80-M85 Disorders of bone density and structure, within M80-M94 Osteopathies and chondropathies, within Chapter 13: Diseases of the musculoskeletal system and connective tissue (M00-M99).
What coding notes apply to M84.42?
ICD-10-CA lists Note, Includes, Excludes notes for M84.42, 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 M84.42
View M84.4M84.40Pathological fracture, not elsewhere classified, multiple sitesM84.41Pathological fracture, not elsewhere classified, shoulder regionM84.43Pathological fracture, not elsewhere classified, forearmM84.44Pathological fracture, not elsewhere classified, handM84.45Pathological fracture, not elsewhere classified, pelvic region and thighM84.46Pathological fracture, not elsewhere classified, lower legM84.47Pathological fracture, not elsewhere classified, ankle and footM84.48Pathological fracture, not elsewhere classified, other siteM84.49Pathological fracture, not elsewhere classified, unspecified site