FB85

ICD-11 MMS 2026-01

Paget disease of bone

Description

A disorder characterised by pathologically excessive resorption of bone by multinucleated osteoclasts and abnormal modelling of disorganised, woven bone by osteoblasts with resultant bone vascularization, weakness, enlargement and deformity.

Inclusions

  • Osteitis deformans

Exclusions from above levels

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

Child codes

  • FB85.0 – Juvenile Paget disease
  • FB85.1 – Paget disease of bone in neoplastic disease
  • FB85.Y – Other specified Paget disease of bone
  • FB85.Z – Paget disease of bone, unspecified

Sibling codes

  • FB80 – Certain specified disorders of bone density or structure
  • FB81 – Osteonecrosis
  • FB82 – Chondropathies
  • FB83 – Low bone mass disorders
  • FB84 – Osteomyelitis or osteitis
  • FB86 – Disorders associated with bone growth
  • FB8Y – Other specified osteopathies or chondropathies
  • FB8Z – Osteopathies or chondropathies, unspecified

Foundation entity

Paget disease of bone – http://id.who.int/icd/entity/1653656681

Allowed postcoordination axes

Part of: 15: Diseases of the musculoskeletal system or connective tissue