Congenital malformations of musculoskeletal system, not elsewhere classified
In Congenital malformations and deformations of the musculoskeletal system (Q65-Q79), chapter 17: Congenital Malformations, Deformations and Chromosomal Abnormalities
14 billable codes under Q79: 7 are an MCC, 5 are a CC; none map to an HCC.A CC or MCC (major CC) is a secondary diagnosis that raises the MS-DRG payment.
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Instructional notes
Excludes2: not included here, code separately if applicable
- congenital (sternomastoid) torticollis (Q68.0)
Official coding guidelines
From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.
Assign Q00-QA1 codes for documented congenital anomalies or genetic disorders at any age, coding non-inherent manifestations separately and sequencing Z38 first on the birth admission.
All codes under Q79
Q79 can't be used on a claim. Pick a billable code below; grey headings group them.
- Q79.0Congenital diaphragmatic hernia
- Q79.1Other congenital malformations of diaphragm
- Q79.2Exomphalos
- Q79.3Gastroschisis
- Q79.4Prune belly syndrome
- Q79.5Other congenital malformations of abdominal wall
- Q79.51Congenital hernia of bladder
- Q79.59Other congenital malformations of abdominal wall
- Q79.6Ehlers-Danlos syndromes
- Q79.60Ehlers-Danlos syndrome, unspecified
- Q79.61Classical Ehlers-Danlos syndrome
- Q79.62Hypermobile Ehlers-Danlos syndrome
- Q79.63Vascular Ehlers-Danlos syndrome
- Q79.69Other Ehlers-Danlos syndromes
- Q79.8Other congenital malformations of musculoskeletal system
- Q79.9Congenital malformation of musculoskeletal system, unspecified
Q79 MS-DRGs
As the principal diagnosis, the billable codes under Q79 group to these 10 MS-DRGs (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.
- DRG 564 Other Musculoskeletal System and Connective Tissue Diagnoses with MCC (7 of 14 codes)
- DRG 565 Other Musculoskeletal System and Connective Tissue Diagnoses with CC (7 of 14 codes)
- DRG 566 Other Musculoskeletal System and Connective Tissue Diagnoses without CC/MCC (7 of 14 codes)
- DRG 393 Other Digestive System Diagnoses with MCC (5 of 14 codes)
- DRG 394 Other Digestive System Diagnoses with CC (5 of 14 codes)
- DRG 395 Other Digestive System Diagnoses without CC/MCC (5 of 14 codes)
- DRG 205 Other Respiratory System Diagnoses with MCC (2 of 14 codes)
- DRG 206 Other Respiratory System Diagnoses without MCC (2 of 14 codes)
- DRG 791 Prematurity with Major Problems (2 of 14 codes)
- DRG 793 Full Term Neonate with Major Problems (2 of 14 codes)
Other codes that refer to Q79
Notes on these codes point to Q79.
About the condition
Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.
Birth Defects
A birth defect is a problem that happens while a baby is developing in the mother's body. Most birth defects happen during the first 3 months of pregnancy. One out of every 33 babies in the United States is born with a birth defect.
Read more about birth defects on MedlinePlusCode history
Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.