ICD-10 Diagnosis Code M21.379

Foot drop, unspecified foot

Diagnosis Code M21.379

ICD-10: M21.379
Short Description: Foot drop, unspecified foot
Long Description: Foot drop, unspecified foot
This is the 2019 version of the ICD-10-CM diagnosis code M21.379

Valid for Submission
The code M21.379 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 M21.379 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
  • 736.79 - Acq ankle-foot def NEC (Approximate Flag)

Synonyms
  • Foot-drop

Information for Patients


Foot Injuries and Disorders

Each of your feet has 26 bones, 33 joints, and more than 100 tendons, muscles, and ligaments. No wonder a lot of things can go wrong. Here are a few common problems:

  • Bunions - hard, painful bumps on the big toe joint
  • Corns and calluses - thickened skin from friction or pressure
  • Plantar warts - warts on the soles of your feet
  • Fallen arches - also called flat feet

Ill-fitting shoes often cause these problems. Aging and being overweight also increase your chances of having foot problems.

  • Claw foot (Medical Encyclopedia)
  • Clubfoot (Medical Encyclopedia)
  • Common peroneal nerve dysfunction (Medical Encyclopedia)
  • Extremity x-ray (Medical Encyclopedia)
  • Flat feet (Medical Encyclopedia)
  • Foot pain (Medical Encyclopedia)
  • Foot sprain - aftercare (Medical Encyclopedia)
  • Foot, leg, and ankle swelling (Medical Encyclopedia)
  • Hand or foot spasms (Medical Encyclopedia)
  • High arch (Medical Encyclopedia)
  • Metatarsal fracture (acute) - aftercare (Medical Encyclopedia)
  • Metatarsal stress fractures - aftercare (Medical Encyclopedia)
  • Metatarsus adductus (Medical Encyclopedia)
  • Morton neuroma (Medical Encyclopedia)

[Read More]

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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