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M25.49 ICD-10-CA code: Effusion of joint, unspecified site

M25.49 is the ICD-10-CA code for “Effusion of joint, unspecified site” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.

Official description

M25.49

Effusion of joint, unspecified site

Short description: Effusion of joint site unspecified

ICD-10-CA · Canada · Also written M2549

Notes for M25.49

As CIHI prints them, with any note M25.49 takes from the headings above it.

Includes

Excludes

Conditions classified elsewhere.

  • Hydrarthrosis of yaws (A66.6)From M25.4 Effusion of joint
  • Abnormality of gait and mobility (R26.-)calcification of:• bursa (M71.4)• shoulder (joint) (M75.3)• tendon (M65.2)deformities classified to M20-M21difficulty in walking (R26.2)From M25 Other joint disorders, not elsewhere classified
  • Joints of the spine (M40-M54)From M20-M25 Other joint disorders
  • 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 M25.4 Effusion of joint
  • 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 M25.49 sits

  1. 1ChapterChapter 13: Diseases of the musculoskeletal system and connective tissue (M00-M99)
  2. 2Block M00-M25Arthropathies
  3. 3Block M20-M25Other joint disorders
  4. 4Category M25Other joint disorders, not elsewhere classified
  5. 5Subcategory M25.4Effusion of joint
  6. 6Valid code M25.49Effusion of joint, 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 M25.49 in the CIHI source

Frequently asked questions

What does ICD-10-CA code M25.49 mean?

M25.49 is the ICD-10-CA code for “Effusion of joint, unspecified site” in CIHI’s ICD-10-CA FY 2026–2027 release.

Where is M25.49 in ICD-10-CA?

M25.49 sits under M25.4 Effusion of joint, within M25 Other joint disorders, not elsewhere classified, within M20-M25 Other joint disorders, within M00-M25 Arthropathies, within Chapter 13: Diseases of the musculoskeletal system and connective tissue (M00-M99).

What coding notes apply to M25.49?

ICD-10-CA lists Note, Excludes, Includes notes for M25.49, 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 M25.49

M25.40Effusion of joint, multiple sitesM25.41Effusion of joint, shoulder regionM25.42Effusion of joint, upper armM25.43Effusion of joint, forearmM25.44Effusion of joint, handM25.45Effusion of joint, pelvic region and thighM25.46Effusion of joint, lower legM25.47Effusion of joint, ankle and footM25.48Effusion of joint, other site