All ICD10 Codes

M21.27

Non-Billable
ChapterM00–M99
Ranksubcategory
Official Description

Flexion deformity, ankle and toes

Use a more specific code (3 billable)
M21.271Flexion deformity, right ankle and toesM21.272Flexion deformity, left ankle and toesM21.279Flexion deformity, unspecified ankle and toes
Metadata & Insights
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 13: Diseases of the Musculoskeletal System and Connective Tissue (M00-M99).
General instructions are available for the parent sections:
View CH13 NotesView M20-M25 NotesView M21 Notes

Clinical Hierarchy

BillableHas subcodes
CH13Diseases of the musculoskeletal system and connective tissue (M00-M99)
M20-M25Other joint disorders (M20-M25)
M21Other acquired deformities of limbs
M21.2Flexion deformity
M21.27Flexion deformity, ankle and toesNot billable
M21.271Flexion deformity, right ankle and toesBillable
M21.272Flexion deformity, left ankle and toesBillable
M21.279Flexion deformity, unspecified ankle and toesBillable

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to M21.27:

categoryM21
Other acquired deformities of limbs
View context instructions
blockM20-M25
Other joint disorders (M20-M25)
View context instructions
chapterCH13
Diseases of the musculoskeletal system and connective tissue (M00-M99)
View context instructions

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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