Congenital malformations and deformations of the musculoskeletal system (Q65-Q79) ICD-10-CM
The Q65–Q79 section covers congenital malformations and deformations of the musculoskeletal system with 321 ICD-10-CM diagnosis codes, of which 255 are billable in fiscal year 2027. The section is organized into the 15 code ranges listed below.
Code Ranges in This Section 15 ranges · 321 codes
The info icon previews the code ranges inside each row and its instructional notations from the official Tabular List.
About the Q65–Q79 Code Range
These conditions are present at birth and affect the shape or formation of the musculoskeletal system. They include differences in limbs, the skull and spine, and structures such as the diaphragm and abdominal wall.
The categories begin with hip and foot deformities, then cover deformities of the head, face, spine, chest and other sites. Q65 distinguishes hips that are fully or partly out of place, including whether one or both hips are affected. Q69 covers polydactyly, meaning extra fingers or toes. Q70 covers syndactyly, meaning fingers or toes joined by webbing; its titles distinguish fused from webbed digits.
Limb reduction defects are grouped by upper limb, lower limb or unspecified limb, then by the part absent or affected. Other limb malformations follow. Later categories separate skull and face bones from the spine and bony chest. They also distinguish conditions affecting growth of the long bones and spine from other bone and cartilage disorders. Q79 includes malformations of the diaphragm, abdominal wall and other musculoskeletal structures.
Questions About This Page
How many codes are in the Q65-Q79 range?
The Q65-Q79 range contains 321 ICD-10-CM diagnosis codes in FY 2027. 255 of them are billable, and the rest are category headers that organize the section.
What conditions does Q65-Q79 cover?
The range covers congenital malformations and deformations of the musculoskeletal system. The code ranges listed above break it into groups of related conditions, and each one links to its own page with the full code list.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
