M88.861 — Osteitis deformans of right lower leg
Is M88.861 billable?
Yes — M88.861 is billable for FY2027. M88.861 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. M88.861 may be submitted for encounters from October 1, 2026 through September 30, 2027.
M88.861 at a glance
| Code | M88.861 |
|---|---|
| Description | Osteitis deformans of right lower leg |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does M88.861 group to?
M88.861 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
How is M88.861 listed in the Alphabetic Index?
The Alphabetic Index lists these routes under M88.86, the nearest indexed parent of M88.861. Use them to find the family, then select the specific code.
- Paget's disease › bone › fibula
- Paget's disease › bone › tibia
Excludes1 — never code together — inherited from M86-M90
The conditions below can never be reported together with M88.861 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 M88
The conditions below can never be reported together with M88.861 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- osteitis deformans in neoplastic disease (M90.6)
Excludes2 — not included here — inherited from Chapter 13
The conditions below are not part of M88.861, but a patient may have both at the same time. When documentation supports it, M88.861 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 M88.861 existed?
M88.861 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.