Congenital malformations of musculoskeletal system, not elsewhere classified (Q79) ICD-10-CM
The Q79 code range covers congenital malformations of musculoskeletal system, not elsewhere classified with 17 ICD-10-CM diagnosis codes. 14 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 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 sternomastoid torticollis Q68.0
Codes in the Q79 Range 17 codes · 14 billable
- Q79 Congenital malformations of musculoskeletal system, not elsewhere classifiedNon-billable
- Q79.0 Congenital diaphragmatic hernia
- Q79.1 Other congenital malformations of diaphragm
- Q79.2 Exomphalos
- Q79.3 Gastroschisis
- Q79.4 Prune belly syndrome
- Q79.5 Other congenital malformations of abdominal wallNon-billable
- Q79.51 Congenital hernia of bladder
- Q79.59 Other congenital malformations of abdominal wall
- Q79.6 Ehlers-Danlos syndromesNon-billable
- Q79.60 Ehlers-Danlos syndrome, unspecified
- Q79.61 Classical Ehlers-Danlos syndrome
- Q79.62 Hypermobile Ehlers-Danlos syndrome
- Q79.63 Vascular Ehlers-Danlos syndrome
- Q79.69 Other Ehlers-Danlos syndromes
- Q79.8 Other congenital malformations of musculoskeletal system
- Q79.9 Congenital malformation of musculoskeletal system, unspecified
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the Q79 range.
Diaphragmatic Eventration
A congenital abnormality characterized by the elevation of the DIAPHRAGM dome. It is the result of a thinned diaphragmatic muscle and injured PHRENIC NERVE, allowing the intra-abdominal viscera to push the diaphragm upward against the LUNG.
Gastroschisis
A congenital defect with major fissure in the ABDOMINAL WALL lateral to, but not at, the UMBILICUS. This results in the extrusion of VISCERA. Unlike OMPHALOCELE, herniated structures in gastroschisis are not covered by a sac or PERITONEUM.
Hydranencephaly
A congenital condition where the greater portions of the cerebral hemispheres and CORPUS STRIATUM are replaced by CSF and glial tissue. The meninges and the skull are well formed, which is consistent with earlier normal embryogenesis of the telencephalon. Bilateral occlusions of the internal carotid arteries in utero is a potential mechanism. Clinical features include intact brainstem reflexes without evidence of higher cortical activity. (Menkes, Textbook of Child Neurology, 5th ed, p307)
Prune Belly Syndrome
A syndrome characterized by abdominal wall musculature deficiency, cryptorchism, and urinary tract abnormalities. The syndrome derives its name from its characteristic distended abdomen with wrinkled skin.
Short Bowel Syndrome
A malabsorption syndrome resulting from extensive operative resection of the SMALL INTESTINE, the absorptive region of the GASTROINTESTINAL TRACT.
About the Q79 Code Range
ICD-10 code Q79 covers a range of congenital malformations of the musculoskeletal system that are not classified elsewhere. These codes are used specifically to identify and document rare or complex birth defects affecting muscles, bones, and related structures, including particular conditions like congenital diaphragmatic hernia, exomphalos, and various types of Ehlers-Danlos syndromes.
The section includes codes for conditions such as Q79.0 (Congenital diaphragmatic hernia), which is also known by synonyms like diaphragmatic hernia syndrome and Fryns syndrome, helping coders connect clinical terms with the exact ICD-10 code. It also addresses other abnormalities like exomphalos (Q79.2), covering congenital omphalocele, and gastroschisis (Q79.3). The section further specifies rare connective tissue disorders under Ehlers-Danlos syndromes (Q79.6), including classic, hypermobile, and vascular types, which are crucial for accurate diagnosis and treatment planning. Additional codes cover other congenital abnormalities of the abdominal wall and musculoskeletal system, with specific examples like congenital hernia of the bladder (Q79.51) and various other syndromes with detailed synonyms. This precise classification aids healthcare professionals and medical coders in correctly identifying and coding rare musculoskeletal congenital anomalies for patient care and health records.
Questions About This Page
How many billable codes are in the Q79 range?
Of the 17 codes in this range, 14 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 Q79 range classify?
The range classifies congenital malformations of musculoskeletal system, not elsewhere classified. 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.
