FA26.1

ICD-11 MMS 2026-01

Hydroxyapatite deposition disease

Description

Calcium hydroxyapatite crystal deposition disease is characterised by the presence of basic calcium phosphate crystals - predominantly hydroxyapatite - in periarticular soft tissues, especially tendons. This entity is best recognised as "calcific tendinitis" at its most frequent site about the shoulder, but the disease involves numerous other sites and may be more appropriately termed calcific periarthritis.

Index terms

  • Hydroxyapatite deposition disease
  • Milwaukee disease
  • apatite-associated destructive arthritis
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  • basic calcium phosphate arthritis
  • hydroxyapatite crystal arthritis
  • hydroxyapatite deposition disease, unspecified site
  • hydroxyapatite deposition disorder
  • idiopathic destructive arthritis
  • Hydroxyapatite deposition disease, multiple sites
  • Hydroxyapatite deposition disease, shoulder region
  • Hydroxyapatite deposition disease, acromioclavicular joint
  • Hydroxyapatite deposition disease, clavicle
  • Hydroxyapatite deposition disease, glenohumeral joint
  • Hydroxyapatite deposition disease, sternoclavicular joint
  • Hydroxyapatite deposition disease, upper arm
  • Hydroxyapatite deposition disease, elbow joint
  • Hydroxyapatite deposition disease, forearm
  • Hydroxyapatite deposition disease, wrist joint
  • Hydroxyapatite deposition disease, hand
  • Hydroxyapatite deposition disease, carpus
  • Hydroxyapatite deposition disease, fingers
  • Hydroxyapatite deposition disease, metacarpus
  • Hydroxyapatite deposition disease, pelvic region or thigh
  • Hydroxyapatite deposition disease, hip joint
  • Hydroxyapatite deposition disease, lower leg
  • Hydroxyapatite deposition disease, knee joint
  • Hydroxyapatite deposition disease, ankle or foot
  • Hydroxyapatite deposition disease, metatarsus
  • Hydroxyapatite deposition disease, tarsus
  • Hydroxyapatite deposition disease, toes
  • Hydroxyapatite deposition disease, ankle joint
  • Hydroxyapatite deposition disease, other joints in foot
  • Hydroxyapatite deposition disease, head
  • Hydroxyapatite deposition disease, neck
  • Hydroxyapatite deposition disease, vertebral column

Exclusions from above levels

  • FA25 – Gout
  • 01 – Certain infectious or parasitic diseases
  • 05 – Endocrine, nutritional or metabolic diseases
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  • 18 – Complications of pregnancy, childbirth and the puerperium
  • 19 – Certain conditions originating in the perinatal period
  • 22 – Injury, poisoning or certain other consequences of external causes
  • DA0E.8 – Temporomandibular joint disorders

Sibling codes

  • FA26.0 – Calcium pyrophosphate dehydrate deposition disease
  • FA26.2 – Chondrocalcinosis
  • FA26.Y – Other specified crystal arthropathies
  • FA26.Z – Crystal arthropathies, unspecified

Foundation entity

Hydroxyapatite deposition disease – http://id.who.int/icd/entity/1750451396

Allowed postcoordination axes

Part of: FA26: Certain specified crystal arthropathies › 15: Diseases of the musculoskeletal system or connective tissue