All ICD10 Codes

M23.321

Billable
ChapterM00–M99
Ranksubcategory
Official Description

Other meniscus derangements, posterior horn of medial meniscus, right knee

Metadata & Insights
  • •2026 ICD-10-CM Edition - Effective October 1, 2025.
  • •Billable/specific code (valid for reimbursement).
  • •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 M23 NotesView M23.3 Notes

Clinical Hierarchy

CH13Diseases of the musculoskeletal system and connective tissue (M00-M99)
M20-M25Other joint disorders (M20-M25)
M23Internal derangement of knee
M23.3Other meniscus derangements
M23.32Other meniscus derangements, posterior horn of medial meniscus
M23.321Other meniscus derangements, posterior horn of medial meniscus, right knee

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to M23.321:

subcategoryM23.3
Other meniscus derangements
View context instructions
categoryM23
Internal derangement of knee
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 v43.1

This code is grouped within the following Diagnosis Related Group(s) for clinical reimbursement:

DRG 562
Fracture, Sprain, Strain and Dislocation Except Femur, Hip, Pelvis and Thigh with MCC
DRG 563
Fracture, Sprain, Strain and Dislocation Except Femur, Hip, Pelvis and Thigh without MCC

Cross Reference

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