1. Home
  2. ICD-10-CM Codes List
  3. Q00-Q99
  4. Q65-Q79
  5. Osteochondrodysplasia with defects of growth of tubular bones and spine (Q77)

Osteochondrodysplasia with defects of growth of tubular bones and spine (Q77)

ICD-10 code Q77 covers a group of rare congenital conditions characterized by abnormal growth of the long (tubular) bones and spine, known as osteochondrodysplasia. These disorders include specific types such as achondrogenesis, achondroplasia, and other skeletal dysplasias affecting bone development and structure.

This ICD-10 section is used to classify diverse musculoskeletal congenital conditions marked by defects in bone formation and growth. For example, Q77.0 refers to achondrogenesis, which includes several subtypes of lethal skeletal disorders, while Q77.4 identifies achondroplasia, a common cause of dwarfism. Other codes such as Q77.1 denote thanatophoric short stature, and Q77.3 covers chondrodysplasia punctata, related to cartilage abnormalities often linked with metabolic or genetic causes. The code Q77.5 stands for diastrophic dysplasia, and Q77.7 for spondyloepiphyseal dysplasia, both affecting bone and joint growth leading to short stature and skeletal deformities. Additionally, Q77.8 includes other rare osteochondrodysplasias with varied growth defects. Coders and clinicians referencing the ICD-10 code for osteochondrodysplasia can use this section to assign precise diagnoses to complex skeletal growth disorders, aiding in appropriate clinical and administrative documentation.

Instructional Notations

Type 1 Excludes

A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.

Type 2 Excludes

A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.

  • congenital myotonic chondrodystrophy G71.13

Clinical Terms

The following clinical terms provide additional context, helping users better understand the clinical background and common associations for each diagnosis listed in this section. Including related terms alongside ICD-10-CM codes supports coders, billers, and healthcare professionals in improving accuracy, enhancing documentation, and facilitating research or patient education.

Acanthosis Nigricans

A circumscribed melanosis consisting of a brown-pigmented, velvety verrucosity or fine papillomatosis appearing in the axillae and other body folds. It occurs in association with endocrine disorders, underlying malignancy, administration of certain drugs, or as in inherited disorder.

Achondroplasia

An autosomal dominant disorder that is the most frequent form of short-limb dwarfism. Affected individuals exhibit short stature caused by rhizomelic shortening of the limbs, characteristic facies with frontal bossing and mid-face hypoplasia, exaggerated lumbar lordosis, limitation of elbow extension, GENU VARUM, and trident hand. (Online Mendelian Inheritance in Man, http://www.ncbi.nlm.nih.gov/Omim, MIM#100800, April 20, 2001)

Chondrodysplasia Punctata

A heterogeneous group of bone dysplasias, the common character of which is stippling of the epiphyses in infancy. The group includes a severe autosomal recessive form (CHONDRODYSPLASIA PUNCTATA, RHIZOMELIC), an autosomal dominant form (Conradi-Hunermann syndrome), and a milder X-linked form. Metabolic defects associated with impaired peroxisomes are present only in the rhizomelic form.

Chondrodysplasia Punctata, Rhizomelic

An autosomal recessive form of CHONDRODYSPLASIA PUNCTATA characterized by defective plasmalogen biosynthesis and impaired peroxisomes. Patients have shortened proximal limbs and severely disturbed endochondral bone formation. The metabolic defects associated with the impaired peroxisomes are present only in the rhizomelic form of chondrodysplasia punctata. (From Scriver et al, Metabolic Basis of Inherited Disease, 6th ed, p1497)

Night Blindness

Failure or imperfection of vision at night or in dim light, with good vision only on bright days. (Dorland, 27th ed)

Thanatophoric Dysplasia

A severe form of neonatal dwarfism with very short limbs. All cases have died at birth or later in the neonatal period.