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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 M21.821
2021 ICD-10-CM Diagnosis Code M21.821
Other specified acquired deformities of right upper arm
2016 2017 2018 2019 2020 2021 Billable/Specific Code
- M21.821 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 M21.821 became effective on October 1, 2020.
- This is the American ICD-10-CM version of M21.821 - other international versions of ICD-10 M21.821 may differ.
The following code(s) above
M21.821 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
M21.821:
- 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
- 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 M21.821 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 M21.821
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
Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.
