2026 ICD-10-CM Diagnosis Code M1AChronic gout

ICD-10-CM Codes›M00–M99›M05-M14›M1A

ICD-10-CM M1A
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

M1A is a non-billable ICD-10-CM category code for chronic gout, so it cannot be submitted on claims. Use a more specific code from this category instead, such as M1A.00X0, M1A.00X1, M1A.0110, and M1A.0111.

Code Identity

ICD-10-CM Code
M1A
Billable Status
No — Non-Billable Category
Code Describes
Chronic gout
Chapter
M05-M14
Inflammatory polyarthropathies

Code Classification

ChapterM00–M99Diseases of the musculoskeletal system and connective tissue
SectionM05-M14Inflammatory polyarthropathies
CategoryM1AChronic gout
This CodeM1AChronic gout

Specific Coding for Chronic goutOverview

Non-specific codes like M1A require more characters. Use one of these billable codes instead:

  • M1A.0 for Idiopathic chronic gout

  • M1A.00 for Idiopathic chronic gout, unspecified site

  • M1A.01 for Idiopathic chronic gout, shoulder

  • M1A.02 for Idiopathic chronic gout, elbow

  • M1A.03 for Idiopathic chronic gout, wrist

  • M1A.04 for Idiopathic chronic gout, hand

  • M1A.05 for Idiopathic chronic gout, hip

  • M1A.06 for Idiopathic chronic gout, knee

  • M1A.07 for Idiopathic chronic gout, ankle and foot

  • M1A.08 for Idiopathic chronic gout, vertebrae

  • M1A.09 for Idiopathic chronic gout, multiple sites

  • M1A.1 for Lead-induced chronic gout

  • M1A.10 for Lead-induced chronic gout, unspecified site

  • M1A.11 for Lead-induced chronic gout, shoulder

  • M1A.12 for Lead-induced chronic gout, elbow

  • M1A.13 for Lead-induced chronic gout, wrist

  • M1A.14 for Lead-induced chronic gout, hand

  • M1A.15 for Lead-induced chronic gout, hip

  • M1A.16 for Lead-induced chronic gout, knee

  • M1A.17 for Lead-induced chronic gout, ankle and foot

  • M1A.18 for Lead-induced chronic gout, vertebrae

  • M1A.19 for Lead-induced chronic gout, multiple sites

  • M1A.2 for Drug-induced chronic gout

  • M1A.20 for Drug-induced chronic gout, unspecified site

  • M1A.21 for Drug-induced chronic gout, shoulder

  • M1A.22 for Drug-induced chronic gout, elbow

  • M1A.23 for Drug-induced chronic gout, wrist

  • M1A.24 for Drug-induced chronic gout, hand

  • M1A.25 for Drug-induced chronic gout, hip

  • M1A.26 for Drug-induced chronic gout, knee

  • M1A.27 for Drug-induced chronic gout, ankle and foot

  • M1A.28 for Drug-induced chronic gout, vertebrae

  • M1A.29 for Drug-induced chronic gout, multiple sites

  • M1A.3 for Chronic gout due to renal impairment

  • M1A.30 for Chronic gout due to renal impairment, unspecified site

  • M1A.31 for Chronic gout due to renal impairment, shoulder

  • M1A.32 for Chronic gout due to renal impairment, elbow

  • M1A.33 for Chronic gout due to renal impairment, wrist

  • M1A.34 for Chronic gout due to renal impairment, hand

  • M1A.35 for Chronic gout due to renal impairment, hip

  • M1A.36 for Chronic gout due to renal impairment, knee

  • M1A.37 for Chronic gout due to renal impairment, ankle and foot

  • M1A.38 for Chronic gout due to renal impairment, vertebrae

  • M1A.39 for Chronic gout due to renal impairment, multiple sites

  • M1A.4 for Other secondary chronic gout

  • M1A.40 for Other secondary chronic gout, unspecified site

  • M1A.41 for Other secondary chronic gout, shoulder

  • M1A.42 for Other secondary chronic gout, elbow

  • M1A.43 for Other secondary chronic gout, wrist

  • M1A.44 for Other secondary chronic gout, hand

  • M1A.45 for Other secondary chronic gout, hip

  • M1A.46 for Other secondary chronic gout, knee

  • M1A.47 for Other secondary chronic gout, ankle and foot

  • M1A.48 for Other secondary chronic gout, vertebrae

  • M1A.49 for Other secondary chronic gout, multiple sites

  • M1A.9 for Chronic gout, unspecified

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Use Additional Code

  • 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

Type 1 Excludes

Type 2 Excludes

  • acute gout M10

7th Character Note

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

7th Character

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

Patient EducationClinical

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.

The full article covers:

  • What is gout?
  • What causes gout?
  • Who is more likely to develop gout?
  • What are the symptoms of gout?
  • How is gout diagnosed?
  • What are the treatments for gout?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About M1AOverview

Is M1A (Chronic gout) a billable code?

No. This is a category header that groups the codes for chronic gout, and headers cannot be submitted on claims. Claims for chronic gout need a more specific code from this category, such as M1A.00X0, M1A.00X1, and M1A.0110.