2021 ICD-10-CM Diagnosis Code M1A.9XX1

Chronic gout, unspecified, with tophus (tophi)

    2016 2017 2018 2019 2020 2021 Billable/Specific Code
  • M1A.9XX1 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 M1A.9XX1 became effective on October 1, 2020.
  • This is the American ICD-10-CM version of M1A.9XX1 - other international versions of ICD-10 M1A.9XX1 may differ.
The following code(s) above M1A.9XX1 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 M1A.9XX1:
  • M00-M99
    2021 ICD-10-CM Range M00-M99

    Diseases of the musculoskeletal system and connective tissue

    • 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)
    Diseases of the musculoskeletal system and connective tissue
  • M1A
    ICD-10-CM Diagnosis Code M1A

    Chronic gout

      2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
    Type 1 Excludes
    Type 2 Excludes
    Use Additional
    • code to identify:
    • Autonomic neuropathy in diseases classified elsewhere (G99.0)
    • Calculus of urinary tract in diseases classified elsewhere (N22)
    • Cardiomyopathy in diseases classified elsewhere (I43)
    • Disorders of external ear in diseases classified elsewhere (H61.1-, H62.8-)
    • Disorders of iris and ciliary body in diseases classified elsewhere (H22)
    • Glomerular disorders in diseases classified elsewhere (N08)
    Chronic gout
Approximate Synonyms
  • Chronic gout with tophi
  • Chronic tophaceous gout
  • Gouty tophi of bilateral ears
  • Gouty tophi of bilateral elbows
  • Gouty tophi of bilateral feet
  • Gouty tophi of bilateral hands
  • Gouty tophi of bilateral olecranon bursa
  • Gouty tophus of bilateral ears
  • Gouty tophus of bilateral elbows
  • Gouty tophus of bilateral feet
  • Gouty tophus of bilateral hands
  • Gouty tophus of bilateral olecranon bursae
ICD-10-CM M1A.9XX1 is grouped within Diagnostic Related Group(s) (MS-DRG v38.0):
  • 553 Bone diseases and arthropathies with mcc
  • 554 Bone diseases and arthropathies without mcc

Convert M1A.9XX1 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 M1A.9XX1
M1A.4790 …… without tophus (tophi)
M1A.4791 …… with tophus (tophi)
M1A.48 Other secondary chronic gout, vertebrae
M1A.48X0 …… without tophus (tophi)
M1A.48X1 …… with tophus (tophi)
M1A.49 Other secondary chronic gout, multiple sites
M1A.49X0 …… without tophus (tophi)
M1A.49X1 …… with tophus (tophi)
M1A.9 Chronic gout, unspecified
M1A.9XX0 …… without tophus (tophi)
M1A.9XX1 …… with tophus (tophi)
M10 Gout
M10.0 Idiopathic gout
M10.00 …… unspecified site
M10.01 Idiopathic gout, shoulder
M10.011 Idiopathic gout, right shoulder
M10.012 Idiopathic gout, left shoulder
M10.019 Idiopathic gout, unspecified shoulder
M10.02 Idiopathic gout, elbow
M10.021 Idiopathic gout, right elbow
M10.022 Idiopathic gout, left elbow

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.