All ICD10 Codes
M1ANot billable, use a more specific code below

Chronic gout

In Inflammatory polyarthropathies (M05-M14), chapter 13: Diseases of the Musculoskeletal System and Connective Tissue

242 billable codes under M1A: none are a CC or MCC; none map to an HCC.

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Instructional notes

Excludes1: not coded here, use a different code

  • gout NOS (M10.-)

Excludes2: not included here, code separately if applicable

  • acute gout (M10.-)

Use additional code: add a second code for this, listed after this one

  • 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)

Official coding guidelines

From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.

Covers site and laterality, acute injury versus chronic musculoskeletal conditions, 7th characters for pathologic fractures, osteoporosis with or without current fracture, and multisystem inflammatory syndrome.

Read Section I.C.13 (page 60)

All codes under M1A

M1A can't be used on a claim. Pick a billable code below; grey headings group them.

M1A MS-DRGs

As the principal diagnosis, the billable codes under M1A group to MS-DRG 553, 554, 917, or 918 (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.

Other codes that refer to M1A

Notes on these codes point to M1A.

  • E72 Excludes1: gout (M1A.-, M10.-)
  • E79 Excludes1: gout (M1A.-, M10.-)
  • G99.0 Code First: gout (M1A.-, M10.-)
  • H22 Code First: gout (M1A.-, M10.-)
  • H61.1 Excludes2: gouty tophi of ear (M1A.-)
  • H62.8 Code First: gout (M1A.-, M10.-)
  • M10 Excludes2: chronic gout (M1A.-)
  • N08 Code First: gout (M1A.-, M10.-)
  • N22 Code First: gout (M1A.-, M10.-)

About the condition

Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.

Gout

Gout is a common type of inflammatory arthritis. It causes pain, swelling, and redness in one or more joints. It usually happens as a flare, which can last for a week or two and then gets better. The flares often begin in your big toe or a lower limb.

Read more about gout on MedlinePlus

Code history

Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.