Q79.9
Congenital malformation of musculoskeletal system, unspecified
Q79.9 (also written Q799) is a billable ICD-10-CM diagnosis code for congenital malformation of musculoskeletal system, unspecified. It is part of the FY2027 code set, effective October 1, 2026. It is one of the 14 codes in category Q79 (Congenital malformations of musculoskeletal system, not elsewhere classified). The Alphabetic Index lists it under 23 entries. Its coding notes include 2 Excludes2 entries.
Guidelines tip
From the FY2027 Official Guidelines. ICD10Ref adds no rules of its own.
Chapter 17 codes can be used for life. Manifestations that are an inherent part of a specifically coded anomaly are not coded separately. A corrected malformation is reported with a personal history code.
Excludes2
Not included here. Both codes may be reported if the patient has both conditions.
- congenital (sternomastoid) torticollis (Q68.0)
Also from chapter/block level (1 note)
- inborn errors of metabolism (E70-E88)
Inclusion terms
Conditions classified to this code.
- Congenital anomaly of musculoskeletal system NOS
- Congenital deformity of musculoskeletal system NOS
Notes
Also from chapter/block level (1 note)
- Codes from this chapter are not for use on maternal records
Alphabetic Index terms
Terms the official Alphabetic Index lists for this code. 23 entries
- Agenesis, bone
- Agenesis, cartilage
- Anomaly, anomalous (congenital) (unspecified type), bone
- Anomaly, anomalous (congenital) (unspecified type), bursa
- Anomaly, anomalous (congenital) (unspecified type), fascia
- Anomaly, anomalous (congenital) (unspecified type), ligament
- Anomaly, anomalous (congenital) (unspecified type), muscle
- Anomaly, anomalous (congenital) (unspecified type), musculoskeletal system, except limbs
- Anomaly, anomalous (congenital) (unspecified type), tendon
- Deformity, bone (acquired) NOS, congenital
- Deformity, bursa, congenital
- Deformity, ligament (acquired), congenital
Show 11 more
- Deformity, muscle (acquired), congenital
- Deformity, musculoskeletal system (acquired), congenital
- Development, abnormal, bone
- Elongated, elongation (congenital), bone
- Fusion, fused (congenital), ossicles
- Hypoplasia, hypoplastic, bone NOS
- Malformation (congenital), bone
- Malformation (congenital), bursa
- Malformation (congenital), musculoskeletal system
- Malformation (congenital), tendon
- Rudimentary (congenital), bone