ICD-10 Diagnosis Code M21.90

Unspecified acquired deformity of unspecified limb

Diagnosis Code M21.90

ICD-10: M21.90
Short Description: Unspecified acquired deformity of unspecified limb
Long Description: Unspecified acquired deformity of unspecified limb
This is the 2019 version of the ICD-10-CM diagnosis code M21.90

Valid for Submission
The code M21.90 is valid for submission for HIPAA-covered transactions.

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

Information for Medical Professionals

Diagnostic Related Groups
The diagnosis code M21.90 is grouped in the following Diagnostic Related Group(s) (MS-DRG V35.0)

  • 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 to ICD-9
  • 736.9 - Acq limb deformity NOS (Approximate Flag)

Synonyms
  • 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

ICD-10 Footnotes

General Equivalence Map Definitions
The ICD-10 and ICD-9 GEMs are used to facilitate linking between the diagnosis codes in ICD-9-CM and the new ICD-10-CM code set. The GEMs are the raw material from which providers, health information vendors and payers can derive specific applied mappings to meet their needs.

  • Approximate Flag - The approximate flag is on, indicating that the relationship between the code in the source system and the code in the target system is an approximate equivalent.
  • No Map Flag - The no map flag indicates that a code in the source system is not linked to any code in the target system.
  • Combination Flag - The combination flag indicates that more than one code in the target system is required to satisfy the full equivalent meaning of a code in the source system.

Present on Admission
The Present on Admission (POA) indicator is used for diagnosis codes included in claims involving inpatient admissions to general acute care hospitals. POA indicators must be reported to CMS on each claim to facilitate the grouping of diagnoses codes into the proper Diagnostic Related Groups (DRG). CMS publishes a listing of specific diagnosis codes that are exempt from the POA reporting requirement.

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