M87.064 — Idiopathic aseptic necrosis of right fibula
Is M87.064 billable?
Yes — M87.064 is billable for FY2027. M87.064 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. M87.064 may be submitted for encounters from October 1, 2026 through September 30, 2027.
M87.064 at a glance
| Code | M87.064 |
|---|---|
| Description | Idiopathic aseptic necrosis of right fibula |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does M87.064 group to?
M87.064 sits in MDC 08 and helps define the logic of 2 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 553Bone Diseases and Arthropathies with MCCmedical
- 554Bone Diseases and Arthropathies without MCCmedical
As a secondary diagnosis, M87.064 is a complication or comorbidity (CC), which can move a stay into a higher-paying DRG.
How is M87.064 listed in the Alphabetic Index?
The Alphabetic Index lists these routes under M87.06, the nearest indexed parent of M87.064. Use them to find the family, then select the specific code.
- Osteonecrosis › idiopathic aseptic › fibula
- Osteonecrosis › idiopathic aseptic › tibia
Excludes1 — never code together — inherited from M86-M90
The conditions below can never be reported together with M87.064 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- postprocedural osteopathies (M96.-)
Excludes1 — never code together — inherited from M87
The conditions below can never be reported together with M87.064 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Use additional code — inherited from M87
Report an additional code alongside M87.064 to fully describe the condition. M87.064 is sequenced first.
- code to identify major osseous defect, if applicable (M89.7-)
Excludes2 — not included here — inherited from Chapter 13
The conditions below are not part of M87.064, but a patient may have both at the same time. When documentation supports it, M87.064 and the excluded code may both 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)
How long has M87.064 existed?
M87.064 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.