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ICD-10-CM Codes
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M00-M99
Diseases of the musculoskeletal system and connective tissue
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M20-M25
Other joint disorders
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M21-
Other acquired deformities of limbs
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2021 ICD-10-CM Diagnosis Code M21.831
2021 ICD-10-CM Diagnosis Code M21.831
Other specified acquired deformities of right forearm
2016 2017 2018 2019 2020 2021 Billable/Specific Code
- M21.831 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
- The 2021 edition of ICD-10-CM M21.831 became effective on October 1, 2020.
- This is the American ICD-10-CM version of M21.831 - other international versions of ICD-10 M21.831 may differ.
The following code(s) above
M21.831 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
- Applicable To annotations, or
- Code Also annotations, or
- Code First annotations, or
- Excludes1 annotations, or
- Excludes2 annotations, or
- Includes annotations, or
- Note annotations, or
- Use Additional annotations
that may be applicable to
M21.831:
- M00-M99
2021 ICD-10-CM Range M00-M99
Diseases of the musculoskeletal system and connective tissueNote- Use an external cause code following the code for the musculoskeletal condition, if applicable, to identify the cause of the musculoskeletal condition
Type 2 Excludes- arthropathic psoriasis (L40.5-)
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- compartment syndrome (traumatic) (T79.A-)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
- M20-M25
2021 ICD-10-CM Range M20-M25
Other joint disorders - M21
ICD-10-CM Diagnosis Code M21
Other acquired deformities of limbs
2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
Type 1 Excludes- acquired absence of limb (Z89.-)
- congenital absence of limbs (Q71-Q73)
- congenital deformities and malformations of limbs (Q65-Q66, Q68-Q74)
Type 2 Excludes- acquired deformities of fingers or toes (M20.-)
- coxa plana (M91.2)
- M21.8
ICD-10-CM Diagnosis Code M21.8
Other specified acquired deformities of limbs
2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
- Acquired bilateral varus deformity of wrists
- Acquired valgus deformity of bilateral wrists
- Acquired varus deformity of bilat wrists
ICD-10-CM M21.831 is grouped within Diagnostic Related Group(s) (MS-DRG v38.0):
- 564 Other musculoskeletal system and connective tissue diagnoses with mcc
- 565 Other musculoskeletal system and connective tissue diagnoses with cc
- 566 Other musculoskeletal system and connective tissue diagnoses without cc/mcc
Convert M21.831 to ICD-9-CM
Code History
- 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
- 2017 (effective 10/1/2016): No change
- 2018 (effective 10/1/2017): No change
- 2019 (effective 10/1/2018): No change
- 2020 (effective 10/1/2019): No change
- 2021 (effective 10/1/2020): No change
ICD-10-CM Codes Adjacent To M21.831
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
Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.
