Osteitis deformans [Paget's disease of bone] (M88) ICD-10-CM
The M88 code range covers osteitis deformans [paget's disease of bone] with 35 ICD-10-CM diagnosis codes. 26 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
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
Codes in the M88 Range 35 codes · 26 billable
- M88 Osteitis deformans [Paget's disease of bone]Non-billable
- M88.0 Osteitis deformans of skull
- M88.1 Osteitis deformans of vertebrae
- M88.8 Osteitis deformans of other bonesNon-billable
- M88.81 Osteitis deformans of shoulderNon-billable
- M88.811 Osteitis deformans of right shoulder
- M88.812 Osteitis deformans of left shoulder
- M88.819 Osteitis deformans of unspecified shoulder
- M88.82 Osteitis deformans of upper armNon-billable
- M88.821 Osteitis deformans of right upper arm
- M88.822 Osteitis deformans of left upper arm
- M88.829 Osteitis deformans of unspecified upper arm
- M88.83 Osteitis deformans of forearmNon-billable
- M88.831 Osteitis deformans of right forearm
- M88.832 Osteitis deformans of left forearm
- M88.839 Osteitis deformans of unspecified forearm
- M88.84 Osteitis deformans of handNon-billable
- M88.841 Osteitis deformans of right hand
- M88.842 Osteitis deformans of left hand
- M88.849 Osteitis deformans of unspecified hand
- M88.85 Osteitis deformans of thighNon-billable
- M88.851 Osteitis deformans of right thigh
- M88.852 Osteitis deformans of left thigh
- M88.859 Osteitis deformans of unspecified thigh
- M88.86 Osteitis deformans of lower legNon-billable
- M88.861 Osteitis deformans of right lower leg
- M88.862 Osteitis deformans of left lower leg
- M88.869 Osteitis deformans of unspecified lower leg
- M88.87 Osteitis deformans of ankle and footNon-billable
- M88.871 Osteitis deformans of right ankle and foot
- M88.872 Osteitis deformans of left ankle and foot
- M88.879 Osteitis deformans of unspecified ankle and foot
- M88.88 Osteitis deformans of other bones
- M88.89 Osteitis deformans of multiple sites
- M88.9 Osteitis deformans of unspecified bone
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the M88 range.
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.
About the M88 Code Range
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.
Questions About This Page
How many billable codes are in the M88 range?
Of the 35 codes in this range, 26 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.
What does the M88 range classify?
The range classifies osteitis deformans [paget's disease of bone]. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
