Q79.9 Congenital malformation of musculoskeletal system, unspecified
The ICD-10-CM code for Congenital malformation of musculoskeletal system, unspecified is Q79.9 (FY2026). It is a billable, claim-ready diagnosis code.
Classification
- Section
- Q65-Q79: Congenital malformations and deformations of the musculoskeletal system (Q65-Q79)
- Category Q79
- 17 codes (14 billable)
- FY2026 Status
- Stable since FY2024
Also Known As
ICD-10-CM Alphabetic Index entries that lead to Q79.9:
- Anomaly, anomalous (congenital) (unspecified type) › bursa
- Anomaly, anomalous (congenital) (unspecified type) › fascia
- Anomaly, anomalous (congenital) (unspecified type) › musculoskeletal system, except limbs
- Agenesis › cartilage
- Agenesis › bone
- Anomaly, anomalous (congenital) (unspecified type) › muscle
- Anomaly, anomalous (congenital) (unspecified type) › bone
- Anomaly, anomalous (congenital) (unspecified type) › ligament
Inclusion Terms
- Congenital anomaly of musculoskeletal system NOS
- Congenital deformity of musculoskeletal system NOS
U.S. Hospital Utilization
- An estimated 445 U.S. inpatient stays in 2023 included Q79.9 among the documented diagnoses.
Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.
Official Coding Guidelines
POA indicator for congenital conditions/anomalies and Q00-Q99 exceptionCongenital conditions and anomalies Assign “Y” for congenital conditions and anomalies except for categories Q00- Q99, Congenital anomalies, which are on the exempt list. Congenital conditions are always considered present on admission.
Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026