M11.9 ICD-10-CA subcategory: Crystal arthropathy, unspecified
M11.9 isn’t a code on its own. Choose one of the 10 codes beneath it, the one the documentation supports.
Official description
M11.9Crystal arthropathy, unspecified
ICD-10-CA · Canada · Also written M119
Codes in M11.9
M11.9 isn’t a code on its own. Open the code that matches what the note documents.
M11.90Crystal arthropathy, unspecified, multiple sitesM11.91Crystal arthropathy, unspecified, shoulder regionM11.92Crystal arthropathy, unspecified, upper armM11.93Crystal arthropathy, unspecified, forearmM11.94Crystal arthropathy, unspecified, handM11.95Crystal arthropathy, unspecified, pelvic region and thighM11.96Crystal arthropathy, unspecified, lower legM11.97Crystal arthropathy, unspecified, ankle and footM11.98Crystal arthropathy, unspecified, other siteM11.99Crystal arthropathy, unspecified, unspecified siteNotes for M11.9
As CIHI prints them, with any note M11.9 takes from the headings above it.
Includes
- Disorders affecting predominantly peripheral (limb) jointsFrom M00-M25 Arthropathies
Excludes
Conditions classified elsewhere.
- 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]
- 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 M11.9 sits
- 1ChapterChapter 13: Diseases of the musculoskeletal system and connective tissue (M00-M99)
- 2Block M00-M25Arthropathies
- 3Block M05-M14Inflammatory polyarthropathies
- 4Category M11Other crystal arthropathies
- 5Subcategory M11.9Crystal arthropathy, unspecified
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
Is M11.9 a valid ICD-10-CA code?
No. M11.9 (Crystal arthropathy, unspecified) is a subcategory heading in CIHI’s ICD-10-CA FY 2026–2027 release. It holds 10 codes; record the one the documentation supports.
Where is M11.9 in ICD-10-CA?
M11.9 sits under M11 Other crystal arthropathies, within M05-M14 Inflammatory polyarthropathies, within M00-M25 Arthropathies, within Chapter 13: Diseases of the musculoskeletal system and connective tissue (M00-M99).
What coding notes apply to M11.9?
ICD-10-CA lists Note, Includes, Excludes notes for M11.9, 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.