2027 ICD-10-CM Diagnosis Code M88Osteitis deformans [Paget's disease of bone]

ICD-10-CM Codes›M00–M99›M86-M90›M88

ICD-10-CM M88
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

M88 is a non-billable ICD-10-CM category code for osteitis deformans [Paget's disease of bone], so it cannot be submitted on claims. Use a more specific code from this category instead, such as M88.0, M88.1, M88.811, and M88.812.

Code Identity

ICD-10-CM Code
M88
Billable Status
No — Non-Billable Category
Code Describes
Osteitis deformans [Paget's disease of bone]
Short Description
Osteitis deformans [Paget's disease of bone]
Same as the full description in the CMS dataset.
Chapter
M86-M90
Other osteopathies

Code Classification

ChapterM00–M99Diseases of the musculoskeletal system and connective tissue
SectionM86-M90Other osteopathies
CategoryM88Osteitis deformans [Paget's disease of bone]
This CodeM88Osteitis deformans [Paget's disease of bone]

Specific Coding for Osteitis deformans [Paget's disease of bone]Overview

Non-specific codes like M88 require more characters. Use one of these billable codes instead:

  • Use M88.0 for Osteitis deformans of skull

  • Use M88.1 for Osteitis deformans of vertebrae

  • M88.8 for Osteitis deformans of other bones

  • M88.81 for Osteitis deformans of shoulder

  • M88.82 for Osteitis deformans of upper arm

  • M88.83 for Osteitis deformans of forearm

  • M88.84 for Osteitis deformans of hand

  • M88.85 for Osteitis deformans of thigh

  • M88.86 for Osteitis deformans of lower leg

  • M88.87 for Osteitis deformans of ankle and foot

  • Use M88.88 for Osteitis deformans of other bones

  • Use M88.89 for Osteitis deformans of multiple sites

  • Use M88.9 for Osteitis deformans of unspecified bone

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to M88: its own notes plus those printed at block M86-M90 and Chapter 13. A note printed at a category, block or chapter applies to every code under it.

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

On M88 itself
  • osteitis deformans in neoplastic disease (M90.6)
From Block M86-M90 Other osteopathies applies to 732 codes
  • postprocedural osteopathies (M96.-)

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Chapter 13 (M00-M99) Diseases of the musculoskeletal system and connective tissue applies to 6,687 codes
  • arthropathic psoriasis (L40.5-)
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • compartment syndrome (traumatic) (T79.A-)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

Notes

General instructions on how these codes are used.

From Chapter 13 (M00-M99) Diseases of the musculoskeletal system and connective tissue applies to 6,687 codes
  • Use an external cause code following the code for the musculoskeletal condition, if applicable, to identify the cause of the musculoskeletal condition

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name M88, its category, or a range that includes it.

Excludes1 2

These codes carry an Excludes1 note naming M88: they are not reported together with it, unless the two conditions are unrelated.

  • M43 Other deforming dorsopathies
    spinal curvature in Paget's disease of bone [osteitis deformans] (M88.-)
  • M90.6 Osteitis deformans in neoplastic diseases
    osteitis deformans [Paget's disease of bone] (M88.-)

Patient EducationClinical

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.

The full article covers:

  • What is Paget's disease of bone?
  • What causes Paget's disease of bone?
  • Who is at risk for Paget's disease of bone?
  • What are the symptoms of Paget's disease of bone?
  • What other problems can Paget's disease of bone cause?
  • How is Paget's disease of bone diagnosed?
  • What are the treatments for Paget's disease of bone?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About M88Overview

What is the ICD-10 code for osteitis deformans [Paget's disease of bone]?

M88 is the ICD-10-CM category for osteitis deformans [Paget's disease of bone], but it is a non-billable header: claims need a more specific code from this category, listed on this page.

Is M88 (Osteitis deformans [Paget's disease of bone]) a billable code?

No. This is a category header that groups the codes for osteitis deformans [Paget's disease of bone], and headers cannot be submitted on claims. Claims for osteitis deformans [Paget's disease of bone] need a more specific code from this category, such as M88.0, M88.1, and M88.811.

Can M88 be reported with M90.6?

Not as a rule. The Excludes1 note on M88 lists "osteitis deformans in neoplastic disease (M90.6)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).