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  5. Acquired deformities of fingers and toes (M20)

Acquired deformities of fingers and toes (M20)

Browse all the diagnosis codes used for acquired deformities of fingers and toes (m20). For easy navigation, the diagnosis codes are sorted in alphabetical order and grouped by sections. Each section is clearly marked with its description, and the corresponding three-digit code range. This format makes it simple to browse diagnosis codes in this chapter or section and find what you're looking for. We've also added green checkmark icons to label billable codes, and red warning icons for non-billable ones. This makes it easy to identify which codes can be billed.

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.

Hallux Rigidus - A condition caused by degenerative arthritis (see OSTEOARTHRITIS) of the METATARSOPHALANGEAL JOINT of the great toe and characterized by pain and limited dorsiflexion, but relatively unrestricted plantar flexion.

Hallux Valgus - Lateral displacement of the great toe (HALLUX), producing deformity of the first METATARSOPHALANGEAL JOINT with callous, bursa, or BUNION formation over the bony prominence.

Hallux Varus - Displacement of the great toe (HALLUX) towards the midline or away from the other TOES. It can be congenital or acquired.

Metatarsophalangeal Joint - The articulation between a metatarsal bone (METATARSAL BONES) and a phalanx.

Instructional Notations

Type 1 Excludes

A 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.

  • acquired absence of fingers and toes Z89
  • congenital absence of fingers and toes Q71.3 Q72.3
  • congenital deformities and malformations of fingers and toes Q66 Q68 Q70 Q74

  • Diseases of the musculoskeletal system and connective tissue (M00–M99)

    • Other joint disorders (M20-M25)

        • Acquired deformities of fingers and toes (M20)

        • M20 Acquired deformities of fingers and toes
        • M20.0 Deformity of finger(s)
        • M20.00 Unspecified deformity of finger(s)
        • M20.001 Unspecified deformity of right finger(s)
        • M20.002 Unspecified deformity of left finger(s)
        • M20.009 Unspecified deformity of unspecified finger(s)
        • M20.01 Mallet finger
        • M20.011 Mallet finger of right finger(s)
        • M20.012 Mallet finger of left finger(s)
        • M20.019 Mallet finger of unspecified finger(s)
        • M20.02 Boutonniere deformity
        • M20.021 Boutonniere deformity of right finger(s)
        • M20.022 Boutonniere deformity of left finger(s)
        • M20.029 Boutonniere deformity of unspecified finger(s)
        • M20.03 Swan-neck deformity
        • M20.031 Swan-neck deformity of right finger(s)
        • M20.032 Swan-neck deformity of left finger(s)
        • M20.039 Swan-neck deformity of unspecified finger(s)
        • M20.09 Other deformity of finger(s)
        • M20.091 Other deformity of right finger(s)
        • M20.092 Other deformity of left finger(s)
        • M20.099 Other deformity of finger(s), unspecified finger(s)
        • M20.1 Hallux valgus (acquired)
        • M20.10 Hallux valgus (acquired), unspecified foot
        • M20.11 Hallux valgus (acquired), right foot
        • M20.12 Hallux valgus (acquired), left foot
        • M20.2 Hallux rigidus
        • M20.20 Hallux rigidus, unspecified foot
        • M20.21 Hallux rigidus, right foot
        • M20.22 Hallux rigidus, left foot
        • M20.3 Hallux varus (acquired)
        • M20.30 Hallux varus (acquired), unspecified foot
        • M20.31 Hallux varus (acquired), right foot
        • M20.32 Hallux varus (acquired), left foot
        • M20.4 Other hammer toe(s) (acquired)
        • M20.40 Other hammer toe(s) (acquired), unspecified foot
        • M20.41 Other hammer toe(s) (acquired), right foot
        • M20.42 Other hammer toe(s) (acquired), left foot
        • M20.5 Other deformities of toe(s) (acquired)
        • M20.5X Other deformities of toe(s) (acquired)
        • M20.5X1 Other deformities of toe(s) (acquired), right foot
        • M20.5X2 Other deformities of toe(s) (acquired), left foot
        • M20.5X9 Other deformities of toe(s) (acquired), unspecified foot
        • M20.6 Acquired deformities of toe(s), unspecified
        • M20.60 Acquired deformities of toe(s), unspecified, unspecified foot
        • M20.61 Acquired deformities of toe(s), unspecified, right foot
        • M20.62 Acquired deformities of toe(s), unspecified, left foot