ICD-10-CM Codes
M00-M99
M20-M25
Other acquired deformities of limbs M21

Other acquired deformities of limbs M21-

Type 1 Excludes

Type 1 Excludes Help

A type 1 excludes note is a pure excludes. It means "not coded here". A type 1 excludes note indicates that the code excluded should never be used at the same time as M21. A type 1 excludes note is for used for when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.

acquired absence of limb (
ICD-10-CM Diagnosis Code Z89
- Z89 Acquired absence of limb
  - Z89.0 Acquired absence of thumb and other finger(s)...
    - Z89.01 Acquired absence of thumb
      Z89.011 Acquired absence of right thumb
      Z89.012 Acquired absence of left thumb
      Z89.019 Acquired absence of unspecified thumb
    - Z89.02 Acquired absence of other finger(s)
      Z89.021 Acquired absence of right finger(s)
      Z89.022 Acquired absence of left finger(s)
      Z89.029 Acquired absence of unspecified finger(s)
  - Z89.1 Acquired absence of hand and wrist
    - Z89.11 Acquired absence of hand
      Z89.111 Acquired absence of right hand
      Z89.112 Acquired absence of left hand
      Z89.119 Acquired absence of unspecified hand
    - Z89.12 Acquired absence of wrist
      Z89.121 Acquired absence of right wrist
      Z89.122 Acquired absence of left wrist
      Z89.129 Acquired absence of unspecified wrist
  - Z89.2 Acquired absence of upper limb above wrist
    - Z89.20 Acquired absence of upper limb, unspecified l...
      Z89.201 Acquired absence of right upper limb, unspeci...
      Z89.202 Acquired absence of left upper limb, unspecif...
      Z89.209 Acquired absence of unspecified upper limb, u...
    - Z89.21 Acquired absence of upper limb below elbow
      Z89.211 Acquired absence of right upper limb below el...
      Z89.212 Acquired absence of left upper limb below elb...
      Z89.219 Acquired absence of unspecified upper limb be...
    - Z89.22 Acquired absence of upper limb above elbow
      Z89.221 Acquired absence of right upper limb above el...
      Z89.222 Acquired absence of left upper limb above elb...
      Z89.229 Acquired absence of unspecified upper limb ab...
    - Z89.23 Acquired absence of shoulder
      Z89.231 Acquired absence of right shoulder
      Z89.232 Acquired absence of left shoulder
      Z89.239 Acquired absence of unspecified shoulder
  - Z89.4 Acquired absence of toe(s), foot, and ankle
    - Z89.41 Acquired absence of great toe
      Z89.411 Acquired absence of right great toe
      Z89.412 Acquired absence of left great toe
      Z89.419 Acquired absence of unspecified great toe
    - Z89.42 Acquired absence of other toe(s)
      Z89.421 Acquired absence of other right toe(s)
      Z89.422 Acquired absence of other left toe(s)
      Z89.429 Acquired absence of other toe(s), unspecified...
    - Z89.43 Acquired absence of foot
      Z89.431 Acquired absence of right foot
      Z89.432 Acquired absence of left foot
      Z89.439 Acquired absence of unspecified foot
    - Z89.44 Acquired absence of ankle
      Z89.441 Acquired absence of right ankle
      Z89.442 Acquired absence of left ankle
      Z89.449 Acquired absence of unspecified ankle
  - Z89.5 Acquired absence of leg below knee
    - Z89.51 Acquired absence of leg below knee
      Z89.511 Acquired absence of right leg below knee
      Z89.512 Acquired absence of left leg below knee
      Z89.519 Acquired absence of unspecified leg below kne...
    - Z89.52 Acquired absence of knee
      Z89.521 Acquired absence of right knee
      Z89.522 Acquired absence of left knee
      Z89.529 Acquired absence of unspecified knee
  - Z89.6 Acquired absence of leg above knee
    - Z89.61 Acquired absence of leg above knee
      Z89.611 Acquired absence of right leg above knee
      Z89.612 Acquired absence of left leg above knee
      Z89.619 Acquired absence of unspecified leg above kne...
    - Z89.62 Acquired absence of hip
      Z89.621 Acquired absence of right hip joint
      Z89.622 Acquired absence of left hip joint
      Z89.629 Acquired absence of unspecified hip joint
  - Z89.9 Acquired absence of limb, unspecified
Z89.-
)
congenital absence of limbs (
ICD-10-CM Diagnosis Code Q71
Reduction defects of upper limb
Q71
-
ICD-10-CM Diagnosis Code Q73
Reduction defects of unspecified limb
Q73
)
congenital deformities and malformations of limbs (
ICD-10-CM Diagnosis Code Q65
Congenital deformities of hip
Type 1 Excludes
- clicking hip (R29.4)
Q65
-
ICD-10-CM Diagnosis Code Q66
Congenital deformities of feet
Type 1 Excludes
- reduction defects of feet (Q72.-)
- valgus deformities (acquired) (M21.0-)
- varus deformities (acquired) (M21.1-)
Q66
,
ICD-10-CM Diagnosis Code Q68
Other congenital musculoskeletal deformities
Type 1 Excludes
- reduction defects of limb(s) (Q71-Q73)
Type 2 Excludes
- congenital myotonic chondrodystrophy (G71.13)
Q68
-
ICD-10-CM Diagnosis Code Q74
Other congenital malformations of limb(s)
Type 1 Excludes
- polydactyly (Q69.-)
- reduction defect of limb (Q71-Q73)
- syndactyly (Q70.-)
Q74
)

Type 2 Excludes

Type 2 Excludes Help

A type 2 excludes note represents "not included here". A type 2 excludes note indicates that the condition excluded is not part of the condition it is excluded from but a patient may have both conditions at the same time. When a type 2 excludes note appears under a code it is acceptable to use both the code (M21) and the excluded code together.

acquired deformities of fingers or toes (
ICD-10-CM Diagnosis Code 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 …… of right finger(s)
      M20.012 …… of left finger(s)
      M20.019 …… of unspecified finger(s)
    - M20.02 Boutonnière deformity
      M20.021 …… of right finger(s)
      M20.022 …… of left finger(s)
      M20.029 Boutonnière deformity of unspecified finger(s...
    - M20.03 Swan-neck deformity
      M20.031 …… of right finger(s)
      M20.032 …… of left finger(s)
      M20.039 …… 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 fin...
  - M20.1 Hallux valgus (acquired)
    - M20.10 …… unspecified foot
    - M20.11 …… right foot
    - M20.12 …… left foot
  - M20.2 Hallux rigidus
    - M20.20 …… unspecified foot
    - M20.21 …… right foot
    - M20.22 …… left foot
  - M20.3 Hallux varus (acquired)
    - M20.30 …… unspecified foot
    - M20.31 …… right foot
    - M20.32 …… left foot
  - M20.4 Other hammer toe(s) (acquired)
    - M20.40 Other hammer toe(s) (acquired), unspecified f...
    - M20.41 …… right foot
    - M20.42 …… 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...
      M20.5X2 Other deformities of toe(s) (acquired), left ...
      M20.5X9 Other deformities of toe(s) (acquired), unspe...
  - M20.6 Acquired deformities of toe(s), unspecified
    - M20.60 Acquired deformities of toe(s), unspecified, ...
    - M20.61 Acquired deformities of toe(s), unspecified, ...
    - M20.62 Acquired deformities of toe(s), unspecified, ...
M20.-
)
coxa plana (
ICD-10-CM Diagnosis Code M91.2
Coxa plana
Applicable To
- Hip deformity due to previous juvenile osteochondrosis
M91.2
)

Codes

M21 Other acquired deformities of limbs
- M21.0 Valgus deformity, not elsewhere classified
  - M21.00 …… unspecified site
  - M21.02 Valgus deformity, not elsewhere classified, elbow
    - M21.021 Valgus deformity, not elsewhere classified, right elbow
    - M21.022 Valgus deformity, not elsewhere classified, left elbow
    - M21.029 Valgus deformity, not elsewhere classified, unspecified elbow
  - M21.05 Valgus deformity, not elsewhere classified, hip
    - M21.051 Valgus deformity, not elsewhere classified, right hip
    - M21.052 Valgus deformity, not elsewhere classified, left hip
    - M21.059 Valgus deformity, not elsewhere classified, unspecified hip
  - M21.06 Valgus deformity, not elsewhere classified, knee
    - M21.061 Valgus deformity, not elsewhere classified, right knee
    - M21.062 Valgus deformity, not elsewhere classified, left knee
    - M21.069 Valgus deformity, not elsewhere classified, unspecified knee
  - M21.07 Valgus deformity, not elsewhere classified, ankle
    - M21.071 Valgus deformity, not elsewhere classified, right ankle
    - M21.072 Valgus deformity, not elsewhere classified, left ankle
    - M21.079 Valgus deformity, not elsewhere classified, unspecified ankle
- M21.1 Varus deformity, not elsewhere classified
  - M21.10 …… unspecified site
  - M21.12 Varus deformity, not elsewhere classified, elbow
    - M21.121 Varus deformity, not elsewhere classified, right elbow
    - M21.122 Varus deformity, not elsewhere classified, left elbow
    - M21.129 Varus deformity, not elsewhere classified, unspecified elbow
  - M21.15 Varus deformity, not elsewhere classified, hip
    - M21.151 Varus deformity, not elsewhere classified, right hip
    - M21.152 Varus deformity, not elsewhere classified, left hip
    - M21.159 Varus deformity, not elsewhere classified, unspecified
  - M21.16 Varus deformity, not elsewhere classified, knee
    - M21.161 Varus deformity, not elsewhere classified, right knee
    - M21.162 Varus deformity, not elsewhere classified, left knee
    - M21.169 Varus deformity, not elsewhere classified, unspecified knee
  - M21.17 Varus deformity, not elsewhere classified, ankle
    - M21.171 Varus deformity, not elsewhere classified, right ankle
    - M21.172 Varus deformity, not elsewhere classified, left ankle
    - M21.179 Varus deformity, not elsewhere classified, unspecified ankle
- M21.2 Flexion deformity
  - M21.20 …… unspecified site
  - M21.21 Flexion deformity, shoulder
    - M21.211 Flexion deformity, right shoulder
    - M21.212 Flexion deformity, left shoulder
    - M21.219 Flexion deformity, unspecified shoulder
  - M21.22 Flexion deformity, elbow
    - M21.221 Flexion deformity, right elbow
    - M21.222 Flexion deformity, left elbow
    - M21.229 Flexion deformity, unspecified elbow
  - M21.23 Flexion deformity, wrist
    - M21.231 Flexion deformity, right wrist
    - M21.232 Flexion deformity, left wrist
    - M21.239 Flexion deformity, unspecified wrist
  - M21.24 Flexion deformity, finger joints
    - M21.241 Flexion deformity, right finger joints
    - M21.242 Flexion deformity, left finger joints
    - M21.249 Flexion deformity, unspecified finger joints
  - M21.25 Flexion deformity, hip
    - M21.251 Flexion deformity, right hip
    - M21.252 Flexion deformity, left hip
    - M21.259 Flexion deformity, unspecified hip
  - M21.26 Flexion deformity, knee
    - M21.261 Flexion deformity, right knee
    - M21.262 Flexion deformity, left knee
    - M21.269 Flexion deformity, unspecified knee
  - M21.27 Flexion deformity, ankle and toes
    - M21.271 Flexion deformity, right ankle and toes
    - M21.272 Flexion deformity, left ankle and toes
    - M21.279 Flexion deformity, unspecified ankle and toes
- M21.3 Wrist or foot drop (acquired)
  - M21.33 Wrist drop (acquired)
    - M21.331 Wrist drop, right wrist
    - M21.332 Wrist drop, left wrist
    - M21.339 Wrist drop, unspecified wrist
  - M21.37 Foot drop (acquired)
    - M21.371 Foot drop, right foot
    - M21.372 Foot drop, left foot
    - M21.379 Foot drop, unspecified foot
- M21.4 Flat foot [pes planus] (acquired)
  - M21.40 …… unspecified foot
  - M21.41 …… right foot
  - M21.42 …… left foot
- M21.5 Acquired clawhand, clubhand, clawfoot and clubfoot
  - M21.51 Acquired clawhand
    - M21.511 …… right hand
    - M21.512 …… left hand
    - M21.519 …… unspecified hand
  - M21.52 Acquired clubhand
    - M21.521 …… right hand
    - M21.522 …… left hand
    - M21.529 …… unspecified hand
  - M21.53 Acquired clawfoot
    - M21.531 …… right foot
    - M21.532 …… left foot
    - M21.539 …… unspecified foot
  - M21.54 Acquired clubfoot
    - M21.541 …… right foot
    - M21.542 …… left foot
    - M21.549 …… unspecified foot
- M21.6 Other acquired deformities of foot
  - M21.61 Bunion
    - M21.611 …… of right foot
    - M21.612 …… of left foot
    - M21.619 …… of unspecified foot
  - M21.62 Bunionette
    - M21.621 …… of right foot
    - M21.622 …… of left foot
    - M21.629 …… of unspecified foot
  - M21.6X Other acquired deformities of foot
    - M21.6X1 Other acquired deformities of right foot
    - M21.6X2 Other acquired deformities of left foot
    - M21.6X9 Other acquired deformities of unspecified foot
- M21.7 Unequal limb length (acquired)
  - M21.70 …… unspecified site
  - M21.72 Unequal limb length (acquired), humerus
    - M21.721 Unequal limb length (acquired), right humerus
    - M21.722 Unequal limb length (acquired), left humerus
    - M21.729 Unequal limb length (acquired), unspecified humerus
  - M21.73 Unequal limb length (acquired), ulna and radius
    - M21.731 Unequal limb length (acquired), right ulna
    - M21.732 Unequal limb length (acquired), left ulna
    - M21.733 Unequal limb length (acquired), right radius
    - M21.734 Unequal limb length (acquired), left radius
    - M21.739 Unequal limb length (acquired), unspecified ulna and radius
  - M21.75 Unequal limb length (acquired), femur
    - M21.751 Unequal limb length (acquired), right femur
    - M21.752 Unequal limb length (acquired), left femur
    - M21.759 Unequal limb length (acquired), unspecified femur
  - M21.76 Unequal limb length (acquired), tibia and fibula
    - M21.761 Unequal limb length (acquired), right tibia
    - M21.762 Unequal limb length (acquired), left tibia
    - M21.763 Unequal limb length (acquired), right fibula
    - M21.764 Unequal limb length (acquired), left fibula
    - M21.769 Unequal limb length (acquired), unspecified tibia and fibula
- M21.8 Other specified acquired deformities of limbs
  - M21.80 Other specified acquired deformities of unspecified limb
  - M21.82 Other specified acquired deformities of upper arm
    - M21.821 Other specified acquired deformities of right upper arm
    - M21.822 Other specified acquired deformities of left upper arm
    - M21.829 Other specified acquired deformities of unspecified upper arm
  - M21.83 Other specified acquired deformities of forearm
    - M21.831 Other specified acquired deformities of right forearm
    - M21.832 Other specified acquired deformities of left forearm
    - M21.839 Other specified acquired deformities of unspecified forearm
  - M21.85 Other specified acquired deformities of thigh
    - M21.851 Other specified acquired deformities of right thigh
    - M21.852 Other specified acquired deformities of left thigh
    - M21.859 Other specified acquired deformities of unspecified thigh
  - M21.86 Other specified acquired deformities of lower leg
    - M21.861 Other specified acquired deformities of right lower leg
    - M21.862 Other specified acquired deformities of left lower leg
    - M21.869 Other specified acquired deformities of unspecified lower leg
- M21.9 Unspecified acquired deformity of limb and hand
  - M21.90 Unspecified acquired deformity of unspecified limb
  - M21.92 Unspecified acquired deformity of upper arm
    - M21.921 Unspecified acquired deformity of right upper arm
    - M21.922 Unspecified acquired deformity of left upper arm
    - M21.929 Unspecified acquired deformity of unspecified upper arm
  - M21.93 Unspecified acquired deformity of forearm
    - M21.931 Unspecified acquired deformity of right forearm
    - M21.932 Unspecified acquired deformity of left forearm
    - M21.939 Unspecified acquired deformity of unspecified forearm
  - M21.94 Unspecified acquired deformity of hand
    - M21.941 …… right hand
    - M21.942 …… left hand
    - M21.949 …… unspecified hand
  - M21.95 Unspecified acquired deformity of thigh
    - M21.951 Unspecified acquired deformity of right thigh
    - M21.952 Unspecified acquired deformity of left thigh
    - M21.959 Unspecified acquired deformity of unspecified thigh
  - M21.96 Unspecified acquired deformity of lower leg
    - M21.961 Unspecified acquired deformity of right lower leg
    - M21.962 Unspecified acquired deformity of left lower leg
    - M21.969 Unspecified acquired deformity of unspecified lower leg

Other acquired deformities of limbs M21-

Reduction defects of upper limb

Reduction defects of unspecified limb

Congenital deformities of hip

Congenital deformities of feet

Other congenital musculoskeletal deformities

Other congenital malformations of limb(s)

Coxa plana