M84.66 — Pathological fracture in other disease, tibia and fibula
Not billable
Is M84.66 billable?
No — M84.66 is a non-billable header code. M84.66 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 30 billable codes beneath M84.66.
Billable codes under this header
- M84.661APathological fracture in other disease, right tibia, initial encounter for fracture
- M84.661DPathological fracture in other disease, right tibia, subsequent encounter for fracture with routine healing
- M84.661GPathological fracture in other disease, right tibia, subsequent encounter for fracture with delayed healing
- M84.661KPathological fracture in other disease, right tibia, subsequent encounter for fracture with nonunion
- M84.661PPathological fracture in other disease, right tibia, subsequent encounter for fracture with malunion
- M84.661SPathological fracture in other disease, right tibia, sequela
- M84.662APathological fracture in other disease, left tibia, initial encounter for fracture
- M84.662DPathological fracture in other disease, left tibia, subsequent encounter for fracture with routine healing
- M84.662GPathological fracture in other disease, left tibia, subsequent encounter for fracture with delayed healing
- M84.662KPathological fracture in other disease, left tibia, subsequent encounter for fracture with nonunion
- M84.662PPathological fracture in other disease, left tibia, subsequent encounter for fracture with malunion
- M84.662SPathological fracture in other disease, left tibia, sequela
- M84.663APathological fracture in other disease, right fibula, initial encounter for fracture
- M84.663DPathological fracture in other disease, right fibula, subsequent encounter for fracture with routine healing
- M84.663GPathological fracture in other disease, right fibula, subsequent encounter for fracture with delayed healing
- M84.663KPathological fracture in other disease, right fibula, subsequent encounter for fracture with nonunion
- M84.663PPathological fracture in other disease, right fibula, subsequent encounter for fracture with malunion
- M84.663SPathological fracture in other disease, right fibula, sequela
- M84.664APathological fracture in other disease, left fibula, initial encounter for fracture
- M84.664DPathological fracture in other disease, left fibula, subsequent encounter for fracture with routine healing
- M84.664GPathological fracture in other disease, left fibula, subsequent encounter for fracture with delayed healing
- M84.664KPathological fracture in other disease, left fibula, subsequent encounter for fracture with nonunion
- M84.664PPathological fracture in other disease, left fibula, subsequent encounter for fracture with malunion
- M84.664SPathological fracture in other disease, left fibula, sequela
- M84.669APathological fracture in other disease, unspecified tibia and fibula, initial encounter for fracture
- M84.669DPathological fracture in other disease, unspecified tibia and fibula, subsequent encounter for fracture with routine healing
- M84.669GPathological fracture in other disease, unspecified tibia and fibula, subsequent encounter for fracture with delayed healing
- M84.669KPathological fracture in other disease, unspecified tibia and fibula, subsequent encounter for fracture with nonunion
- M84.669PPathological fracture in other disease, unspecified tibia and fibula, subsequent encounter for fracture with malunion
- M84.669SPathological fracture in other disease, unspecified tibia and fibula, sequela
M84.66 at a glance
| Code | M84.66 |
|---|---|
| Description | Pathological fracture in other disease, tibia and fibula |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
How is M84.66 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to M84.66. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Fracture, pathological › due to › specified disease NEC › fibula (pathologic)
- Fracture, pathological › due to › specified disease NEC › tibia (pathologic)
Excludes1 — never code together — inherited from M84.6
The conditions below can never be reported together with M84.66 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- pathological fracture in osteoporosis (M80.-)
Excludes2 — not included here — inherited from Chapter 13
The conditions below are not part of M84.66, but a patient may have both at the same time. When documentation supports it, M84.66 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 M84.66, but a patient may have both at the same time. When documentation supports it, M84.66 and the excluded code may both be reported.
- traumatic fracture of bone-see fracture, by site
Code also — inherited from M84.6
Two codes may be needed to describe the condition fully. Whether M84.66 is sequenced first depends on the reason for the encounter.
- underlying condition
What codes fall under M84.66? (5)
- M84.661Pathological fracture in other disease, right tibianot billable
- M84.662Pathological fracture in other disease, left tibianot billable
- M84.663Pathological fracture in other disease, right fibulanot billable
- M84.664Pathological fracture in other disease, left fibulanot billable
- M84.669Pathological fracture in other disease, unspecified tibia and fibulanot billable
How long has M84.66 existed?
M84.66 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.
What other codes are in the M84.6 family? (8)
- M84.60Pathological fracture in other disease, unspecified sitenot billable
- M84.61Pathological fracture in other disease, shouldernot billable
- M84.62Pathological fracture in other disease, humerusnot billable
- M84.63Pathological fracture in other disease, ulna and radiusnot billable
- M84.64Pathological fracture in other disease, handnot billable
- M84.65Pathological fracture in other disease, pelvis and femurnot billable
- M84.67Pathological fracture in other disease, ankle and footnot billable
- M84.68Pathological fracture in other disease, other sitenot billable