2027 ICD-10-CM Diagnosis Code M88.89Osteitis deformans of multiple sites
ICD-10-CM Codes›M00–M99›M86-M90›M88
- Billable — Valid for Submission
- Chronic Condition
M88.89 is a billable ICD-10-CM diagnosis code for osteitis deformans of multiple sites. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 553 through 554. Coders also document this condition as Paget's disease-multiple sites. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified bone disease and musculoskeletal deformities.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Paget's disease-multiple sites
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to M88.89: its own notes plus those printed at M88, 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.
- osteitis deformans in neoplastic disease (M90.6)
- 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.
- 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.
- 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 M88.89, its category, or a range that includes it.
Excludes1 2
These codes carry an Excludes1 note naming M88.89: they are not reported together with it, unless the two conditions are unrelated.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
multiple sites M88.89
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
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.
Convert M88.89 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About M88.89Overview
What is the ICD-10 code for osteitis deformans of multiple sites?
The ICD-10-CM code for osteitis deformans of multiple sites is M88.89 (sometimes written as M8889). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is M88.89 (Osteitis deformans of other bones) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report osteitis deformans of multiple sites on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does M88.89 group to?
When osteitis deformans of multiple sites is the principal diagnosis on an inpatient stay, it groups to MS-DRG 554, 553, with relative weights from 0.8328 to 1.2492 depending on complications. Higher weights mean higher Medicare reimbursement.
Can M88.89 be reported with M90.6?
Not as a rule. The Excludes1 note at M88, which applies to M88.89, 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).
What is the ICD-9 equivalent of M88.89?
Under the General Equivalence Mappings, osteitis deformans of multiple sites converts to ICD-9-CM 731.0 (osteitis deformans NOS). The mapping is approximate, so confirm the match fits the documentation.
