M84.58XK — Pathological fracture in neoplastic disease, other specified site, subsequent encounter for fracture with nonunion
Is M84.58XK billable?
Yes, but M84.58XK is an unspecified code. M84.58XK is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, M84.58XK 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 M84.58XK — the more specific alternatives are listed below.
More specific alternatives
- M84.511KPathological fracture in neoplastic disease, right shoulder, subsequent encounter for fracture with nonunion
- M84.521KPathological fracture in neoplastic disease, right humerus, subsequent encounter for fracture with nonunion
- M84.531KPathological fracture in neoplastic disease, right ulna, subsequent encounter for fracture with nonunion
- M84.541KPathological fracture in neoplastic disease, right hand, subsequent encounter for fracture with nonunion
- M84.550KPathological fracture in neoplastic disease, pelvis, subsequent encounter for fracture with nonunion
- M84.561KPathological fracture in neoplastic disease, right tibia, subsequent encounter for fracture with nonunion
- M84.571KPathological fracture in neoplastic disease, right ankle, subsequent encounter for fracture with nonunion
M84.58XK at a glance
| Code | M84.58XK |
|---|---|
| Description | Pathological fracture in neoplastic disease, other specified site, 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 M84.58XK?
In M84.58XK, the 7th character K means subsequent encounter for fracture with nonunion. The 7th character is required for M84.58XK to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
Which MS-DRGs does M84.58XK group to?
M84.58XK 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
As a secondary diagnosis, M84.58XK is a complication or comorbidity (CC), which can move a stay into a higher-paying DRG.
How is M84.58XK listed in the Alphabetic Index?
The Alphabetic Index lists these routes under M84.58, the nearest indexed parent of M84.58XK. Use them to find the family, then select the specific code.
- Collapse › vertebra › in › neoplasm
- Fracture, pathological › due to › neoplastic disease NEC › neck (pathologic)
- Fracture, pathological › due to › neoplastic disease NEC › rib (pathologic)
- Fracture, pathological › due to › neoplastic disease NEC › skull (pathologic)
- Fracture, pathological › due to › neoplastic disease NEC › specified site NEC (pathologic)
- Fracture, pathological › due to › neoplastic disease NEC › vertebra (pathologic)
Inclusion terms
Alternative wording in documentation that is classified to M84.58XK.
- Pathological fracture in neoplastic disease, vertebrae
Excludes2 — not included here — inherited from Chapter 13
The conditions below are not part of M84.58XK, but a patient may have both at the same time. When documentation supports it, M84.58XK 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 M84.58XK, but a patient may have both at the same time. When documentation supports it, M84.58XK and the excluded code may both be reported.
- traumatic fracture of bone-see fracture, by site
Code also — inherited from M84.5
Two codes may be needed to describe the condition fully. Whether M84.58XK is sequenced first depends on the reason for the encounter.
- underlying neoplasm
How long has M84.58XK existed?
M84.58XK 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.