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  2. ICD-10-CM Codes List
  3. M00–M99
  4. M86-M90
  5. Osteitis deformans [Paget's disease of bone] (M88)

Osteitis deformans [Paget's disease of bone] (M88)

ICD-10 code M88 covers osteitis deformans, commonly known as Paget's disease of bone, a chronic disorder causing abnormal bone remodeling. These codes specify the condition by affected bone location, such as the skull, vertebrae, or limbs, helping to identify the exact site of involvement.

This section includes detailed codes like M88.0 for Paget's disease of the skull (also referred to as Paget's disease of the jaw), M88.1 for vertebrae involvement (including cervical, thoracic, lumbar spine, pelvis, or sacrum), and various others pinpointing affected bones of the shoulder, upper arm, forearm, hand, thigh, lower leg, ankle, and foot. For example, M88.811 identifies Paget disease of the right scapula, while M88.832 relates to the left forearm. The code M88.89 is used when multiple bone sites are affected. Including synonyms such as “Paget’s disease of femur” or “Paget’s disease-radius” helps clarify coding choices when a common name is used instead. Use these specific ICD-10 codes for precise documentation and classification of Paget’s disease by bone location, facilitating accurate diagnosis and treatment tracking.

Instructional Notations

Type 1 Excludes

A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.

  • osteitis deformans in neoplastic disease M90.6

Clinical Terms

The following clinical terms provide additional context, helping users better understand the clinical background and common associations for each diagnosis listed in this section. Including related terms alongside ICD-10-CM codes supports coders, billers, and healthcare professionals in improving accuracy, enhancing documentation, and facilitating research or patient education.

Osteitis Deformans

A disease marked by repeated episodes of increased bone resorption followed by excessive attempts at repair, resulting in weakened, deformed bones of increased mass. The resultant architecture of the bone assumes a mosaic pattern in which the fibers take on a haphazard pattern instead of the normal parallel symmetry.