Q79.9 – Congenital malformation of musculoskeletal system, unspecified
ICD-10-CM 2027 diagnosis code · Congenital malformations and deformations of the musculoskeletal system
- Code
Q79.9(claims format:Q799)- Description
- Congenital malformation of musculoskeletal system, unspecified
- Short description
- Congenital malformation of musculoskeletal system, unsp
- Billable
- Yes – valid for HIPAA-covered transactions
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 17. Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders (Q00-QA1)
- Block
- Q65-Q79 Congenital malformations and deformations of the musculoskeletal system
- Parent codes
- Q79
Notes for Q79.9
- Congenital anomaly of musculoskeletal system NOS
- Congenital deformity of musculoskeletal system NOS
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
Q79 – Congenital malformations of musculoskeletal system, not elsewhere classified
- congenital (sternomastoid) torticollis (Q68.0)
Index terms for Q79.9
Entries in the ICD-10-CM alphabetic index that lead to this code:
- Agenesis, bone
- Rudimentary, bone
- Malformation, bone
- Agenesis, cartilage
- Malformation, bursa
- Malformation, tendon
- Fusion, fused, ossicles
- Anomaly, anomalous, bone
- Anomaly, anomalous, bursa
- Anomaly, anomalous, muscle
- Anomaly, anomalous, fascia
- Anomaly, anomalous, tendon
- Development, abnormal, bone
- Elongated, elongation, bone
- Deformity, bone, congenital
- Deformity, bursa, congenital
- Anomaly, anomalous, ligament
- Deformity, muscle, congenital
- Deformity, ligament, congenital
- Hypoplasia, hypoplastic, bone NOS
- Malformation, musculoskeletal system
- Deformity, musculoskeletal system, congenital
- Anomaly, anomalous, musculoskeletal system, except limbs
Related codes in Q79
- Q79.0 – Congenital diaphragmatic herniaBillable
- Q79.1 – Other congenital malformations of diaphragmBillable
- Q79.2 – ExomphalosBillable
- Q79.3 – GastroschisisBillable
- Q79.4 – Prune belly syndromeBillable
- Q79.5 – Other congenital malformations of abdominal wallHeader
- Q79.6 – Ehlers-Danlos syndromesHeader
- Q79.8 – Other congenital malformations of musculoskeletal systemBillable
Frequently asked questions
What is ICD-10 code Q79.9?
Q79.9 is the ICD-10-CM code for congenital malformation of musculoskeletal system, unspecified, in the block Q65-Q79 (Congenital malformations and deformations of the musculoskeletal system).
Is Q79.9 a billable code?
Yes. Q79.9 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does Q79.9 belong to?
It belongs to category Q79 – Congenital malformations of musculoskeletal system, not elsewhere classified.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.