M88 vs M90.6
M88 (Osteitis deformans [Paget's disease of bone]) compared with M90.6 (Osteitis deformans in neoplastic diseases), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.
Can these codes be reported together?
No — do not report together. M88 carries an Excludes1 note covering M90.6: “osteitis deformans in neoplastic disease (M90.6)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
No — do not report together. M90.6 carries an Excludes1 note covering M88: “osteitis deformans [Paget's disease of bone] (M88.-)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
Side by side
| M88Osteitis deformans [Paget's disease of bone] | M90.6Osteitis deformans in neoplastic diseases | |
|---|---|---|
| Billing status | Non-billable header | Non-billable header |
| Classification | M00-M99 — Diseases of the Musculoskeletal System and Connective Tissue (M00-M99) | M00-M99 — Diseases of the Musculoskeletal System and Connective Tissue (M00-M99) |
| Definition | Osteitis deformans [Paget's disease of bone] is a non-billable ICD-10-CM category code (M88). | Osteitis deformans in neoplastic diseases is a non-billable ICD-10-CM category code (M90.6). |
| Includes | — | Osteitis deformans in malignant neoplasm of bone |
| Code first | — | the neoplasm (C40.-, C41.-) |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources