ICD-10 Code for Ossification

The ICD-10-CM 2027 alphabetic index lists ossification with the subterms below. More specific codes depend on the details documented, as listed in the official index (19 codes, 11 billable).

Index entries for Ossification

artery – see Arteriosclerosis
auricle (ear) – see Disorder, pinna, specified type NEC
bronchial – J98.09
cardiac – see Degeneration, myocardial
cartilage (senile) – see Disorder, cartilage, specified type NEC
coronary (artery) – see Disease, heart, ischemic, atherosclerotic
diaphragm – J98.6
ear, middle – see Otosclerosis
falx cerebri – G96.198
fontanel, premature – Q75.009
heart – see also Degeneration, myocardial
- valve – see Endocarditis
larynx – J38.7
ligament – see Disorder, tendon, specified type NEC
- posterior longitudinal – see Spondylopathy, specified NEC
meninges (cerebral) (spinal) – G96.198
multiple, eccentric centers – see Disorder, bone, development or growth
muscle – see also Calcification, muscle
- due to burns – see Myositis, ossificans, in, burns
- paralytic – see Myositis, ossificans, in, quadriplegia
- progressive – see Myositis, ossificans, progressiva
- specified NEC – M61.50
  - ankle – M61.57- (header)
  - foot – M61.57- (header)
  - forearm – M61.53- (header)
  - hand – M61.54- (header)
  - lower leg – M61.56- (header)
  - multiple sites – M61.59
  - pelvic region – M61.55- (header)
  - shoulder region – M61.51- (header)
  - specified site NEC – M61.58
  - thigh – M61.55- (header)
  - upper arm – M61.52- (header)
- traumatic – see Myositis, ossificans, traumatica
myocardium, myocardial – see Degeneration, myocardial
penis – N48.89
periarticular – see Disorder, joint, specified type NEC
pinna – see Disorder, pinna, specified type NEC
rider's bone – see Ossification, muscle, specified NEC
sclera – H15.89
subperiosteal, post-traumatic – M89.8X- (header)
tendon – see Disorder, tendon, specified type NEC
trachea – J39.8
tympanic membrane – see Disorder, tympanic membrane, specified NEC
vitreous (humor) – see Deposit, crystalline

How to choose the right code

Start with the main term, then pick the indented subterm that matches the documentation (type, cause, site, laterality, episode of care). Always confirm the code in the tabular list: follow its Excludes1/Excludes2, “code first” and “use additional code” notes, and add a 7th character where required.

Source: CDC/NCHS ICD-10-CM FY2027 alphabetic index.