ICD-10-CM Code M21.61

Bunion

Version 2020 Non-Billable Code

Not Valid for Submission

M21.61 is a "header" nonspecific and non-billable code code, consider using a code with a higher level of specificity for a diagnosis of bunion. The code is NOT valid for the year 2020 for the submission of HIPAA-covered transactions.

ICD-10:M21.61
Short Description:Bunion
Long Description:Bunion

Consider the following ICD-10 codes with a higher level of specificity:

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 M21.61 are found in the index:


Clinical Information

  • BUNION-. abnormal swelling of the inner aspect of the first metatarsal head affecting the first metatarsophalangeal joint.
  • BUNION TAILOR'S-. abnormal swelling of the outer aspect of the fifth metatarsal head affecting the fifth metatarsophalangeal joint.

Code Classification

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

Code History

  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020

Information for Patients


Bunion A bunion, known technically as hallux valgus, is a bony bump on the side of the foot at the base of the big toe. Bunions develop slowly as pressure on the joint at the base of the big toe causes the toe to move out of place, leaning inward toward the second toe. Because this joint carries a lot of weight during activities like standing and walking, bunions can cause foot pain, stiffness, redness, and swelling. Calluses may form where the big toe and second toe rub together or on the ball of the foot. Unless they are treated, bunions get worse over time, and it may become difficult to wear regular shoes or walk without pain. Bunions can occur in one or both feet.In most cases, bunions develop in adulthood. Rarely, children may be born with bunions (known as congenital hallux valgus) or develop them later in childhood (juvenile or adolescent hallux valgus).
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