ICD10BillableValid for clinical use

ICD-10 Code M21.769: Unequal limb length (acquired), unspecified tibia and fibula

M21.769 is a billable ICD-10 diagnosis code used to classify Unequal limb length (acquired), unspecified tibia and fibula in medical records and claims. You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records. ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Diseases of the musculoskeletal system and connective tissue (M00-M99).

Reviewed by HealthAssure Clinical TeamUpdated 21 May 2026

What is this code?

ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Diseases of the musculoskeletal system and connective tissue (M00-M99).

When is it used?

  • May be used when a clinician documents unequal limb length (acquired), unspecified tibia and fibula in a patient's medical record.
  • May appear in hospital records, claims, referrals, and clinical documentation.
  • This code can be used as a clinically usable diagnosis entry in standardized coding workflows.

What it does not mean

  • A code alone does not explain severity, treatment plan, or outcome.
  • A medical code should not be treated as a substitute for a doctor's diagnosis or advice.

Code hierarchy

chapter
13Diseases of the musculoskeletal system and connective tissue (M00-M99)
block
M00-M25Arthropathies
block
M20-M25Other joint disorders
category
M21Other acquired deformities of limbs
category
M21.7Unequal limb length (acquired)
category
M21.76Unequal limb length (acquired), tibia and fibula
currentM21.76

Where you may see this code

You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records.

Related specialists

Orthopedic SpecialistRheumatologist

Coding guidelines

Common synonyms

Unequal limb length (acquired), unspecified tibia and fibulaUnequal limb length (acquired)Unequal limb lengthUnequal limb length acquired, unspecified tibia and fibula

Frequently asked questions

Code details

CodeM21.769
SystemICD10
Display nameUnequal limb length (acquired), unspecified tibia and fibula
ChapterDiseases of the musculoskeletal system and connective tissue (M00-M99)
BlockOther joint disorders

Flags

BillableYes
Valid clinical useYes

Source

SourceICD-10
Version2026-annual
Releaseannual
Year2026

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.

ICD-10 Code M21.769 for Unequal limb length (acquired), unspecified tibia and fibula | HealthAssure