M1A

ICD-10Non-billable category

Chronic gout

Official ICD-10-CM descriptor (FY2026)

Chronic gout

M1A is a category heading, not a billable code. CMS does not accept it on a claim; report one of the more specific codes beneath it.

Excludes1

Not coded here. An Excludes1 code should never be reported at the same time as the code above it.

  • gout NOS (M10.-)

Excludes2

Not included here. The condition is not part of this code, but a patient may have both, and both codes may be reported together.

  • acute gout (M10.-)

Use additional code

Report an additional code to identify the associated condition.

  • 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)

7th character

  • The appropriate 7th character is to be added to each code from category M1A

Permitted 7th characters

0without tophus (tophi)
1with tophus (tophi)

More specific codes under M1A

Where this code sits

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Source

ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.

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