2021 ICD-10-CM Code M21.37
Foot drop (acquired)
Not Valid for Submission
M21.37 is a "header" nonspecific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of foot drop (acquired). The code is NOT valid for the year 2021 for the submission of HIPAA-covered transactions. Category or Header define the heading of a category of codes that may be further subdivided by the use of 4th, 5th, 6th or 7th characters.
Code Classification
Specific Coding for Foot drop (acquired)
Header codes like M21.37 require more digits to indicate the appropriate level of specificity. Consider using any of the following ICD-10 codes with a higher level of specificity when coding for foot drop (acquired):
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 M21.37 are found in the index:
Clinical Information
- PERONEAL NEUROPATHIES-. disease involving the common peroneal nerve or its branches the deep and superficial peroneal nerves. lesions of the deep peroneal nerve are associated with paralysis of dorsiflexion of the ankle and toes and loss of sensation from the web space between the first and second toe. lesions of the superficial peroneal nerve result in weakness or paralysis of the peroneal muscles which evert the foot and loss of sensation over the dorsal and lateral surface of the leg. traumatic injury to the common peroneal nerve near the head of the fibula is a relatively common cause of this condition. from joynt clinical neurology 1995 ch51 p31
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)
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Code History
- FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
- FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
- FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
- FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
- FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
- FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016 (First year ICD-10-CM implemented into the HIPAA code set)