M89.166 — Partial physeal arrest, right distal tibia

Billable

Is M89.166 billable?

Yes — M89.166 is billable for FY2027. M89.166 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. M89.166 may be submitted for encounters from October 1, 2026 through September 30, 2027.

M89.166 at a glance

Code	M89.166
Description	Partial physeal arrest, right distal tibia
Billable	Yes
Code set	ICD-10-CM FY2027
Valid for encounters	October 1, 2026 – September 30, 2027

Which MS-DRGs does M89.166 group to?

M89.166 sits in MDC 08 and helps define the logic of 3 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.

564Other Musculoskeletal System and Connective Tissue Diagnoses with MCCmedical
565Other Musculoskeletal System and Connective Tissue Diagnoses with CCmedical
566Other Musculoskeletal System and Connective Tissue Diagnoses without CC/MCCmedical

How is M89.166 listed in the Alphabetic Index?

The Alphabetic Index lists these routes under M89.16, the nearest indexed parent of M89.166. Use them to find the family, then select the specific code.

Arrest, arrested › epiphyseal › lower leg
Arrest, arrested › epiphyseal › complete › tibia
Arrest, arrested › epiphyseal › partial › tibia

Excludes1 — never code together — inherited from M86-M90

The conditions below can never be reported together with M89.166 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.-)

Excludes2 — not included here — inherited from Chapter 13

The conditions below are not part of M89.166, but a patient may have both at the same time. When documentation supports it, M89.166 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 M89.166 existed?

M89.166 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.