Q79.8
Other congenital malformations of musculoskeletal system
Q79.8 (also written Q798) is a billable ICD-10-CM diagnosis code for other congenital malformations of musculoskeletal system. 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 28 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)
Care settings
How CMS programs treat this code. These are CMS claim edits and list entries, not coverage or eligibility rules.
Home Health Primary
Accepted as the primary (principal) diagnosis on a home health claim. The Home Health Grouper assigns it to the MMTA - Other clinical group.
Source: CMS Home Health Grouper Software v07.2.26, effective October 1, 2026Inclusion terms
Conditions classified to this code.
- Absence of muscle
- Absence of tendon
- Accessory muscle
- Amyotrophia congenita
- Congenital constricting bands
- Congenital shortening of tendon
- Poland syndrome
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. 28 entries
- Absence (of) (organ or part) (complete or partial), muscle (congenital) (pectoral)
- Absence (of) (organ or part) (complete or partial), tendon (congenital)
- Accessory (congenital), bone NEC
- Accessory (congenital), muscle
- Accessory (congenital), tendon
- Acromicria, acromikria
- Agenesis, muscle
- Agenesis, musculoskeletal system NEC
- Agenesis, tendon
- Amyoplasia congenita
- Amyotrophia, amyotrophy, amyotrophic, congenita
- Band (s), constricting, congenital
Show 16 more
- Contraction (s), contracture, contracted, ligament, congenital
- Contraction (s), contracture, contracted, muscle (postinfective) (postural) NEC, congenital
- Diastasis, muscle, congenital
- Dysplasia, muscle
- Fusion, fused (congenital), bone
- Hypoplasia, hypoplastic, muscle
- Krabbe's, syndrome, congenital muscle hypoplasia
- Myelo-osteo-musculodysplasia hereditaria
- Poland syndrome
- Short, shortening, shortness, tendon, congenital
- Supernumerary (congenital), bone
- Supernumerary (congenital), muscle
- Syndrome, Krabbe's congenital muscle hypoplasia
- Syndrome, Touraine's
- Thoracogastroschisis (congenital)
- Touraine's syndrome