M84.750K — Atypical femoral fracture, unspecified, subsequent encounter for fracture with nonunion
Is M84.750K billable?
Yes, but M84.750K is an unspecified code. M84.750K is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, M84.750K is an unspecified or catch-all code. Payers apply additional scrutiny to unspecified codes and many deny them when the medical record supports a more specific option, so check the documentation before selecting M84.750K — the more specific alternatives are listed below.
More specific alternatives
- M84.751KIncomplete atypical femoral fracture, right leg, subsequent encounter for fracture with nonunion
- M84.752KIncomplete atypical femoral fracture, left leg, subsequent encounter for fracture with nonunion
- M84.754KComplete transverse atypical femoral fracture, right leg, subsequent encounter for fracture with nonunion
- M84.755KComplete transverse atypical femoral fracture, left leg, subsequent encounter for fracture with nonunion
- M84.757KComplete oblique atypical femoral fracture, right leg, subsequent encounter for fracture with nonunion
- M84.758KComplete oblique atypical femoral fracture, left leg, subsequent encounter for fracture with nonunion
M84.750K at a glance
| Code | M84.750K |
|---|---|
| Description | Atypical femoral fracture, unspecified, subsequent encounter for fracture with nonunion |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
| 7th character "K" | subsequent encounter for fracture with nonunion |
What does the 7th character "K" mean in M84.750K?
In M84.750K, the 7th character K means subsequent encounter for fracture with nonunion. The 7th character is required for M84.750K to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
Which MS-DRGs does M84.750K group to?
M84.750K 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.
- 521Hip Replacement with Principal Diagnosis of Hip Fracture with MCCsurgical
- 522Hip Replacement with Principal Diagnosis of Hip Fracture without MCCsurgical
As a secondary diagnosis, M84.750K is a complication or comorbidity (CC), which can move a stay into a higher-paying DRG.
How is M84.750K listed in the Alphabetic Index?
The Alphabetic Index lists these routes under M84.750, the nearest indexed parent of M84.750K. Use them to find the family, then select the specific code.
- Fracture, nontraumatic, NEC › atypical › femur
Excludes2 — not included here — inherited from Chapter 13
The conditions below are not part of M84.750K, but a patient may have both at the same time. When documentation supports it, M84.750K 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)
Excludes2 — not included here — inherited from M84
The conditions below are not part of M84.750K, but a patient may have both at the same time. When documentation supports it, M84.750K and the excluded code may both be reported.
- traumatic fracture of bone-see fracture, by site
How long has M84.750K existed?
M84.750K first appears in FY2018 (FY2017 is not available, so it may have appeared then).
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.