2027 ICD-10-CM Diagnosis Code M90.679Osteitis deformans in neoplastic diseases, unspecified ankle and foot
ICD-10-CM Codes›M00–M99›M86-M90›M90
- Billable — Valid for Submission
- Chronic Condition
M90.679 is a billable ICD-10-CM diagnosis code for osteitis deformans in neoplastic diseases, unspecified ankle and foot. 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. The code is a manifestation code that cannot be reported as the principal diagnosis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified bone disease and musculoskeletal deformities.
Code Identity
Code Classification
Code EditsBilling
Medicare Code Editor checks that affect claim validity for M90.679.
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to M90.679: its own notes plus those printed at M90.6, M90, 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 [Paget's disease of bone] (M88.-)
- 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)
Code First
The underlying condition named in the note is sequenced before this code.
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 M90.679, its category, or a range that includes it.
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 M90.679 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About M90.679Overview
What is the ICD-10 code for osteitis deformans in neoplastic diseases, unspecified ankle and foot?
The ICD-10-CM code for osteitis deformans in neoplastic diseases, unspecified ankle and foot is M90.679 (sometimes written as M90679). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is M90.679 (Osteitis deformans in neoplastic diseases, ankle and foot) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report osteitis deformans in neoplastic diseases, unspecified ankle and foot on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does M90.679 group to?
On inpatient claims, osteitis deformans in neoplastic diseases, unspecified ankle and foot maps to MS-DRG 554, 553, with relative weights from 0.8328 to 1.2492 depending on complications. Higher weights mean higher Medicare reimbursement.
Can M90.679 be a principal diagnosis?
No. This is a manifestation code: osteitis deformans in neoplastic diseases, unspecified ankle and foot describes the manifestation of an underlying disease rather than the disease itself, so the underlying condition is sequenced first.
Can M90.679 be reported with a code from M88?
Not as a rule. The Excludes1 note at M90.6, which applies to M90.679, lists "osteitis deformans [Paget's disease of bone] (M88.-)". 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).
