M89.771 — Major osseous defect, right ankle and foot
Is M89.771 billable?
Yes — M89.771 is billable for FY2027. M89.771 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. M89.771 may be submitted for encounters from October 1, 2026 through September 30, 2027.
M89.771 at a glance
| Code | M89.771 |
|---|---|
| Description | Major osseous defect, right ankle and foot |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does M89.771 group to?
M89.771 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 M89.771 listed in the Alphabetic Index?
The Alphabetic Index lists these routes under M89.77, the nearest indexed parent of M89.771. Use them to find the family, then select the specific code.
- Defect, defective › major osseous › ankle
- Defect, defective › major osseous › foot
- Defect, defective › major osseous › metatarsus
- Defect, defective › major osseous › tarsus
- Defect, defective › major osseous › toes
- Defect, defective › osseous, major › ankle
- Defect, defective › osseous, major › foot
- Defect, defective › osseous, major › metatarsus
Excludes1 — never code together — inherited from M86-M90
The conditions below can never be reported together with M89.771 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.-)
Code first — inherited from M89.7
The underlying condition below must be sequenced before M89.771. M89.771 describes a manifestation and cannot be the principal or first-listed diagnosis.
Excludes2 — not included here — inherited from Chapter 13
The conditions below are not part of M89.771, but a patient may have both at the same time. When documentation supports it, M89.771 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 M89.771 existed?
M89.771 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.