ICD-10-CM 2027
ICD-10 code for Equinus talipes
From the official ICD-10-CM alphabetic index entry “Talipes (congenital) › equinus”. Page updated September 29, 2026.
About coding Equinus talipes
The ICD-10-CM code for Equinus talipes is Q66.89 (Other specified congenital deformities of feet).
Within Q66.8, choose Q66.89 (Other specified congenital deformities of feet) only when documentation doesn't support a more specific option: congenital vertical talus deformity, unspecified foot (Q66.80), congenital vertical talus deformity, right foot (Q66.81) and congenital vertical talus deformity, left foot (Q66.82).
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 Equinus talipes ICD-10 codes
What is the ICD-10 code for Equinus talipes?
- Q66.89 — Other specified congenital deformities of feet.
Is Q66.89 billable?
- Yes. Q66.89 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can Q66.89 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict Q66.89 as a principal diagnosis.
Is Q66.89 a CC or MCC?
- No. Q66.89 is neither a CC nor an MCC under MS-DRG v44.0.