M21.16
Non-Billable
ChapterM00–M99
Ranksubcategory
Official Description
Varus deformity, not elsewhere classified, knee
Metadata & Insights
- •2026 ICD-10-CM Edition - Effective October 1, 2025.
- •Non-billable category (requires more specific sub-code).
- •Chapter 13: Diseases of the Musculoskeletal System and Connective Tissue (M00-M99).
Instructional Notes
Includes
- Bow leg
- Genu varum
General instructions are available for the parent sections:
Clinical Hierarchy
CH13Diseases of the musculoskeletal system and connective tissue (M00-M99)
M20-M25Other joint disorders (M20-M25)
M21Other acquired deformities of limbs
M21.1Varus deformity, not elsewhere classified
M21.16Varus deformity, not elsewhere classified, knee
M21.161Varus deformity, not elsewhere classified, right knee
M21.162Varus deformity, not elsewhere classified, left knee
M21.169Varus deformity, not elsewhere classified, unspecified knee
Applicable Ancestor Context
The following parent sections contain instructions or notes that apply to M21.16:
chapterCH13
Diseases of the musculoskeletal system and connective tissue (M00-M99)
View context instructionsAlphabetic Index Mentions
These are Diagnosis Index lookup paths that route to M21.16. Use them as entry terms for search, then confirm final coding instructions in the Tabular List and notes above.
3 raw paths
Bowleg (s) (acquired)1 unique routes
Genu1 unique routes
MS-DRG Classification
No direct MS-DRG triggers identified.
Cross Reference
Find Procedures (ICD-10-PCS)
Find surgical and procedural codes related to Varus deformity, not elsewhere classified, knee.
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