ICD-10 Diagnosis Code M21.40

Flat foot [pes planus] (acquired), unspecified foot

Diagnosis Code M21.40

ICD-10: M21.40
Short Description: Flat foot [pes planus] (acquired), unspecified foot
Long Description: Flat foot [pes planus] (acquired), unspecified foot
This is the 2017 version of the ICD-10-CM diagnosis code M21.40

Valid for Submission
The code M21.40 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 M21.40 is grouped in the following Diagnostic Related Group(s) (MS-DRG v33.0)

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

Convert to ICD-9 Additional informationCallout TooltipGeneral Equivalence Map
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.

Synonyms
  • Acquired flexible flat foot
  • Acquired pes
  • Acquired spastic flat foot
  • Hypermobile flat foot
  • Peroneal spastic flat foot
  • Pes planus
  • Rigid flat foot

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


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