Osteochondrodysplasia with defects of growth of tubular bones and spine (Q77) ICD-10-CM
The Q77 code range covers osteochondrodysplasia with defects of growth of tubular bones and spine with 11 ICD-10-CM diagnosis codes. 10 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
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
Codes in the Q77 Range 11 codes · 10 billable
- Q77 Osteochondrodysplasia with defects of growth of tubular bones and spineNon-billable
- Q77.0 Achondrogenesis
- Q77.1 Thanatophoric short stature
- Q77.2 Short rib syndrome
- Q77.3 Chondrodysplasia punctata
- Q77.4 Achondroplasia
- Q77.5 Diastrophic dysplasia
- Q77.6 Chondroectodermal dysplasia
- Q77.7 Spondyloepiphyseal dysplasia
- Q77.8 Other osteochondrodysplasia with defects of growth of tubular bones and spine
- Q77.9 Osteochondrodysplasia with defects of growth of tubular bones and spine, unspecified
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the Q77 range.
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.
About the Q77 Code Range
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.
Questions About This Page
How many billable codes are in the Q77 range?
Of the 11 codes in this range, 10 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.
What does the Q77 range classify?
The range classifies osteochondrodysplasia with defects of growth of tubular bones and spine. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
