ICD-10-CM 2027
ICD-10 code for Sesamoid bones accessory
From the official ICD-10-CM alphabetic index entry “Accessory (congenital) › sesamoid bones”. Page updated September 29, 2026.
About coding Sesamoid bones accessory
The ICD-10-CM code for Sesamoid bones accessory is Q74.8 (Other specified congenital malformations of limb(s)). The official index lists 2 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on Q74.8.
Within Q74, choose Q74.8 (Other specified congenital malformations of limb(s)) only when documentation doesn't support a more specific option: other congenital malformations of upper limb(s), including shoulder girdle (Q74.0), congenital malformation of knee (Q74.1), other congenital malformations of lower limb(s), including pelvic girdle (Q74.2), Arthrogryposis multiplex congenita (Q74.3) and unspecified congenital malformation of limb(s) (Q74.9).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 564 (Other Musculoskeletal System and Connective Tissue Diagnoses with MCC, relative weight 1.4908), DRG 565 (Other Musculoskeletal System and Connective Tissue Diagnoses with CC, relative weight 0.9783) and DRG 566 (Other Musculoskeletal System and Connective Tissue Diagnoses without CC/MCC, relative weight 0.7378), in MDC 08 (Diseases and Disorders of the Musculoskeletal System and Connective Tissue), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific Sesamoid bones accessory codes (official index)
Common questions about Sesamoid bones accessory ICD-10 codes
What is the ICD-10 code for Sesamoid bones accessory?
- Q74.8 — Other specified congenital malformations of limb(s). More specific codes apply when the documentation supports them: Q74.2, Q74.0.
What is the ICD-10 code for foot sesamoid bones accessory?
- Q74.2 — Other congenital malformations of lower limb(s), including pelvic girdle.
What is the ICD-10 code for hand sesamoid bones accessory?
- Q74.0 — Other congenital malformations of upper limb(s), including shoulder girdle.
Is Q74.8 billable?
- Yes. Q74.8 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can Q74.8 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict Q74.8 as a principal diagnosis.
Is Q74.8 a CC or MCC?
- No. Q74.8 is neither a CC nor an MCC under MS-DRG v44.0.