All ICD10 Codes
M88Not billable, use a more specific code below

Osteitis deformans [Paget's disease of bone]

In Other osteopathies (M86-M90), chapter 13: Diseases of the Musculoskeletal System and Connective Tissue

26 billable codes under M88: none are a CC or MCC; none map to an HCC.

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Instructional notes

Excludes1: not coded here, use a different code

  • osteitis deformans in neoplastic disease (M90.6)

Also applies, from Other osteopathies (M86-M90)

These notes sit on M86-M90 and apply to every code under it, including M88.

Excludes1: not coded here, use a different code

  • postprocedural osteopathies (M96.-)

Official coding guidelines

From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.

Covers site and laterality, acute injury versus chronic musculoskeletal conditions, 7th characters for pathologic fractures, osteoporosis with or without current fracture, and multisystem inflammatory syndrome.

Read Section I.C.13 (page 60)

All codes under M88

M88 can't be used on a claim. Pick a billable code below; grey headings group them.

M88 MS-DRGs

As the principal diagnosis, all 26 billable codes under M88 group to MS-DRG 553 or 554 (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.

Other codes that refer to M88

Notes on these codes point to M88.

  • M43 Excludes1: spinal curvature in Paget's disease of bone [osteitis deformans] (M88.-)
  • M90.6 Excludes1: osteitis deformans [Paget's disease of bone] (M88.-)

About the condition

Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.

Paget's Disease of Bone

Paget's disease of bone is a chronic bone disorder. Normally, there is a process in which your bones break down and then regrow. In Paget's disease, this process is abnormal. There is excessive breakdown and regrowth of bone. Because the bones regrow too quickly, they are bigger and softer than normal. They may be misshapen and easily fractured (broken). Paget's usually affects just one or a few bones.

Read more about paget's disease of bone on MedlinePlus

Code history

Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.