2021 ICD-10-CM Code M21.4
Flat foot [pes planus] (acquired)
Not Valid for Submission
M21.4 is a "header" nonspecific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of flat foot [pes planus] (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.
| ICD-10: | M21.4 |
| Short Description: | Flat foot [pes planus] (acquired) |
| Long Description: | Flat foot [pes planus] (acquired) |
Code Classification
Specific Coding for Flat foot [pes planus] (acquired)
Header codes like M21.4 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 flat foot [pes planus] (acquired):
Tabular List of Diseases and Injuries
The Tabular List of Diseases and Injuries is a list of ICD-10 codes, organized "head to toe" into chapters and sections with guidance for inclusions, exclusions, descriptions and more. The following references are applicable to the code M21.4:
Type 1 Excludes
Type 1 ExcludesA type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
- congenital pes planus Q66.5
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 M21.4 are found in the index:
- - Deformity - Q89.9
- - limb (acquired) - M21.90
- - flat foot - M21.4
- - limb (acquired) - M21.90
Clinical Information
- FLATFOOT-. anomaly in which one or more of the arches of the feet are flat.
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)
[Learn More]
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)