ICD-10-CM Code M21.90

Valid for Submission

M21.90 is a billable code used to specify a medical diagnosis of unspecified acquired deformity of unspecified limb. The code is valid for the year 2020 for the submission of HIPAA-covered transactions. The ICD-10-CM code M21.90 might also be used to specify conditions or terms like acquired deformity of joint of upper limb, acquired deformity of limb, acquired deformity of the wrist / hand, angulation deformity of lower limb, deformity of limb, form of joint - finding, etc

Index to Diseases and Injuries

The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for the code M21.90 are found in the index:

• - Deformity - Q89.9
  • - joint (acquired) NEC - M21.90
  • - limb (acquired) - M21.90

Synonyms

The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

• Acquired deformity of joint of upper limb
• Acquired deformity of limb
• Acquired deformity of the wrist / hand
• Angulation deformity of lower limb
• Deformity of limb
• Form of joint - finding
• Form of joint - finding
• Joint deformity
• Joint deviation
• Multiple joint deformity

Diagnostic Related Groups

The ICD-10 code M21.90 is grouped in the following groups for version MS-DRG V37.0 What are Diagnostic Related Groups?
The Diagnostic Related Groups (DRGs) are a patient classification scheme which provides a means of relating the type of patients a hospital treats. The DRGs divides all possible principal diagnoses into mutually exclusive principal diagnosis areas referred to as Major Diagnostic Categories (MDC). applicable from 10/01/2019 through 09/30/2020.

• 564 - OTHER MUSCULOSKELETAL SYSTEM AND CONNECTIVE TISSUE DIAGNOSES WITH MCC
• 565 - OTHER MUSCULOSKELETAL SYSTEM AND CONNECTIVE TISSUE DIAGNOSES WITH CC
• 566 - OTHER MUSCULOSKELETAL SYSTEM AND CONNECTIVE TISSUE DIAGNOSES WITHOUT CC/MCC

Convert M21.90 to ICD-9

• 736.9 - Acq limb deformity NOS (Approximate Flag)

Code Classification

• Diseases of the musculoskeletal system and connective tissue (M00–M99)
  • Other joint disorders (M20-M25)
    • Other acquired deformities of limbs (M21)

Code History

• FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016
  (First year ICD-10-CM implemented into the HIPAA code set)
• FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
• FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
• FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
• FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020

Tools

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• Convert M21.90 to ICD-9