ICD-10-CM 2027
ICD-10 code for valgus pes
From the official ICD-10-CM alphabetic index entry “Pes (congenital) › valgus”. Page updated September 29, 2026.
About coding valgus pes
The ICD-10-CM code for valgus pes is Q66.6 (Other congenital valgus deformities of feet).
Within Q66, choose Q66.6 (Other congenital valgus deformities of feet) only when documentation doesn't support a more specific option: congenital talipes equinovarus (Q66.0), congenital talipes calcaneovarus (Q66.1), congenital metatarsus (primus) varus (Q66.2), other congenital varus deformities of feet (Q66.3), congenital talipes calcaneovalgus (Q66.4), congenital pes planus (Q66.5), congenital pes cavus (Q66.7), other congenital deformities of feet (Q66.8) and 1 more.
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.
Common questions about valgus pes ICD-10 codes
What is the ICD-10 code for valgus pes?
- Q66.6 — Other congenital valgus deformities of feet.
Is Q66.6 billable?
- Yes. Q66.6 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can Q66.6 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict Q66.6 as a principal diagnosis.
Is Q66.6 a CC or MCC?
- No. Q66.6 is neither a CC nor an MCC under MS-DRG v44.0.